Numerical investigations of work of driven pile on claystones

Vestnik MGSU 2/2019 Volume 14
  • Sychkina Evgeniya N. - Perm National Research Polytechnic University (PNRPU) Candidate of Technical Sciences, Associate Professor of the Department of Construction Technology and Geotechnics, Perm National Research Polytechnic University (PNRPU), 29 Komsomolsky prospekt, Perm, 614990, Russian Federation.
  • Antipov Vadim V. - Perm National Research Polytechnic University (PNRPU) postgraduate student of Department of Construction Technology and Geotechnics, Perm National Research Polytechnic University (PNRPU), 29 Komsomolsky prospekt, Perm, 614990, Russian Federation.
  • Ofrikhter Yan V. - Perm National Research Polytechnic University (PNRPU) postgraduate student of Department of Construction Technology and Geotechnics, Perm National Research Polytechnic University (PNRPU), 29 Komsomolsky prospekt, Perm, 614990, Russian Federation.

Pages 188-198

Introduction. Reviewed the features of the work of the pile on Permian claystones with the help of numerical and field experiments, analytical calculations. Materials and methods. Numerical modeling was performed in the Plaxis 3D and Midas GTS NX software packages. Full-scale tests of driven piles are made in accordance with the requirements of GOST 20276-2012. The obtained results are compared with the results of analytical calculations according to SP 24.13330.2011. Results. The scientific novelty of the investigation consists in a comparative analysis of the results of numerical modeling of the interaction of a driving pile with claystones with the results of field tests and analytical calculations. Finite element analysis in software package Plaxis 3D using Hardening Soil model shows higher values of settlement (up to 6 times) in relation to stabilized settlement of full-scale pile tests. Calculations in the software package Midas GTS NX showed overestimated values of pile settlements in relation to full-scale pile tests (13-24 times). Analytical calculations in accordance with SP 24.13330.2011 also showed overestimated (up to 3 times) values of the maximum pile settlement in relation to the stabilized settlement during full-scale pile tests. Conclusions. The calculations by the finite element method in the package Plaxis 3D and Midas GTS NX, by the analytical method according to SP 24.13330.2011, show overestimated values of settlement in relation to the stabilized settlement of piles on claystones. Using the Linear-Elastic model for claystones in numerical calculations in Plaxis 3D provides a value close to the settlement of full-scale pile. However, the use of this model is not fully justified for claystones due to the presence of residual deformations and the nonlinear character of pile settlement during loading. Necessary to correct the existing numerical and analytical methods for calculating pile foundations on claystones. It is necessary to continue the work on the further generalization of the experience of arranging piles on weathered claystones in order to evaluate the long-term work of not only a single pile, but also a pile foundation.

DOI: 10.22227/1997-0935.2019.2.188-198

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Peculiarities of stress distribution in beamless floor plate as a result of prestressing forces

Vestnik MGSU 9/2014
  • Kremnev Vasiliy Anatol'evich - LLC "InformAviaKoM" Director General, LLC "InformAviaKoM", 2 Pionerskaya str., Korolev, Moscow Region, 141074, Russian Federation; +7 (495) 645-20-62; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Kuznetsov Vitaliy Sergeevich - Mytishchi Branch, Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Professor, Department of Architectural and Construction Design, Mytishchi Branch, Moscow State University of Civil Engineering (MGSU), 50 Olimpiyskiy prospect, Mytishchi, Moscow Region, 141006, Russian Federation; +7 (495) 583-07-65; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Talyzova Yulia Aleksandrovna - Mytishchi Branch, Moscow State University of Civil Engineering (MGSU) Assistant Lecturer, Department of Architectural and Construction Design, Mytishchi Branch, Moscow State University of Civil Engineering (MGSU), 50 Olimpiyskiy prospect, Mytishchi, Moscow Region, 141006, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 48-53

The article discusses the features of the stress state of the plate of capitalless girderless overlapping as a result of force of prestressed reinforcement, where the reinforcement used is high-strength reinforcement in flexible shell of "Monostrend" type. The peculiarity of specific design solution is a diagonal arrangement of prestressed reinforcement with heads fixed at the outer edges of the columns. The purpose of this arrangement of the prestressed reinforcement is deflection reduction of the central area of a plate and reduction of the width of cracks on the lower surface in the bay and on the upper surface of the support areas. The article shows the distribution of normal stresses of existing loads in the plane plate. The stress distribution over the thickness of the plate was assumed uniform. In order to establish design size of a section in diagonal direction it is possible to set the variables x and y and then calculate the coordinates of stress distribution curves in the concrete as a result of compression by prestress force. The authors offer diameter values of equal stresses in case of 4 and 8 K7O ropes. The method of calculating prestressing losses of concrete creep are offered.

DOI: 10.22227/1997-0935.2014.9.48-53

References
  1. Rukovodstvo po proektirovaniyu zhelezobetonnykh konstruktsiy s bezbalochnymi perekrytiyami [Design Guidelines for Reinforced Concrete Structures with Beamless Floor]. Moscow, Stroyizdat Publ., 1979, 63 p.
  2. Pogrebnoy I.O., Kuznetsov V.D. Bezrigel'nyy predvaritel'no napryazhennyy karkas s ploskim perekrytiem [Beamless Prestressed Frame with Flat Roof]. Inzhenerno-stroitel'nyy zhurnal [Engineering and Construction Journal]. 2010, no. 3, pp. 52—55.
  3. Karpenko N.I. Obshchie modeli mekhaniki zhelezobetona [General Models of Reinforced Concrete Mechanics]. Moscow, Stroyizdat Publ., 1996, 416 p.
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  5. Vol'mir A.S. Gibkie plastinki i obolochki [Flexible Plates and Shells]. Moscow, Gosudarstvennoe izdatel’stvo tekhniko-teoreticheskoy literatury Publ., 1956, 419 p.
  6. Muttoni A. Conception et dimensionnement de la precontrainte. Ecole Polytechnique federale de Lausanne, Ann?e acad?mique 2011—2012, 35 p. Available at: http://i-concrete.epfl.ch/cours/epfl/pb/2012/Pr%C3%A9sentations/ponts-1-P-2012-05-08.pdf/. Date of access: 22.01.2014.
  7. Sitnikov S.L., Miryushenko E.F.; patent holder S.L. Sitnikov. Pat. 2427686 RF, MPK E04C 5/10. Sposob izgotovleniya predvaritel'no napryazhennykh zhelezobetonnykh konstruktsiy i monostrend. ¹ 2009132979/03 ; zayavl. 02.09.2009 ; opubl. 27.08.2011. Byul. ¹ 24 [Russian Patent 2427686 RF, MPK E04C 5/10. Method of Manufacturing Prestressed Reinforced Concrete Structures and Monostrends. No. 2009132979/03 ; notice 02.09.2009 ; publ. 27.08.2011. Bulletin no. 24.]. 8 p.
  8. Spasojevic A., Burdet O., Muttoni A. Applications structurales du beton fiber ultra-hautes performances aux ponts. EPFL, Laboratoire de Construction en beton, 2008, 60 p. Available at: http://ibeton.epfl.ch/Publications/2008/Spasojevic08b.pdf/. Date of access: 22.01.2014.
  9. Tikhonov I.N. Armirovanie elementov monolitnykh zhelezobetonnykh zdaniy : Posobie po proektirovaniyu [Reinforcement of the Elements of Monolithic Reinforced Concrete Buildings]. Moscow, NITs Stroitel'stvo Publ., 2007, 168 p.
  10. Wieczorek M. Influence of Amount and Arrangement of Reinforcement on the Mechanism of Destruction of the Corner Part of a Slab-Column Structure. Prosedia Engineering. 2013, vol. 57, pp. 1260—1268. Available at: http://www.sciencedirect.com/science/article/pii/S1877705813008928. Date of access: 22.02.2014. DOI: http://dx.doi.org/10.1016/j.proeng.2013.04.159.
  11. Vatin N.I., Ivanov A.D. Sopryazhenie kolonny i bezrebristoy beskapitel'noy plity perekrytiya monolitnogo zhelezobetonnogo karkasnogo zdaniya [Connection of a Column and Non-ribbed Capitalless Slab of Monolithic Reinforced Concrete Frame Building]. Saint Petersburg, SPbODZPP Publ., 2006, 82 p. Available at: http://www.engstroy.spb.ru/library/ivanov_kolonna_i_perekrytie.pdf. Date of access: 22.01.2014.
  12. Samokhvalova E.O., Ivanov A.D. Styk kolonny s bezbalochnym beskapitel'nym perekrytiem v monolitnom zdanii [The Joint of a Column and Beamless Capitalless Floor in Monolithic Building]. Inzhenerno-stroitel'nyy zhurnal [Engineering and Construction Journal]. 2009, no. 3. Available at: http://engstroy.spb.ru/index_2009_03/samohvalova_styk.pdf. Date of access: 22.01.2014.
  13. Bezukhov N.I. Osnovy teorii uprugosti, plastichnosti i polzuchesti [Fundamentals of Elasticity and Creep Theory]. 2nd edition, Moscow, Vysshaya shkola Publ., 1968, 512 p.
  14. Altenbach H., Huang C., Naumenko K. Creep-damage Predictions in Thinwalled Structures by Use of Isotropic and Anisotropic Damage Models. The Journal of Strain Analisys for Engineering Design. 2002, vol. 37, no. 3, pp. 265—275. http://dx.doi.org/10.1243/0309324021515023.
  15. Altenbach H., Morachkovsky O., Naumenko K., Sychov A. Geometrically Nonlinear Bending of Thin-walled Shells and Plates under Creep-damage Conditions. Archive of Applied Mechanics. 1997, vol. 67, no. 5, pp. 339—352. DOI: http://dx.doi.org/10.1007/s004190050122.

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Calculation of the three-layer shallow shell taking into account the creep of the middle layer

Vestnik MGSU 7/2015
  • Andreev Vladimir Igorevich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, corresponding member of Russian Academy of Architecture and Construction Sciences, chair, Department of Strength of Materials, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Yazyev Batyr Meretovich - Rostov State University of Civil Engineering (RSUCE) Doctor of Technical Sciences, Professor, Chair, Depart- ment of Strength of Materials; +7 (863) 201-91-09, Rostov State University of Civil Engineering (RSUCE), 162 Sotsialisticheskaya St., Rostov-on-Don, 344022, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Chepurnenko Anton Sergeevich - Don State Technical University (DGTU) Candidate of Engineering Science, teaching assistant of the strength of materials department, Don State Technical University (DGTU), 162 Sotsialisticheskaya str., Rostov-on-Don, 344022; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Litvinov Stepan Viktorovch - Rostov State University of Civil Engineering (RSUCE) , Rostov State University of Civil Engineering (RSUCE), 162 Sotsialisticheskaya str., Rostov-on-Don, 344022, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 17-24

The equations of the finite element method for calculation of sandwich shells taking into account creep were obtained. The shell is represented as a set of flat triangular elements. The thickness of the carrier layers is supposed to be small compared to the total thickness of the shell. It is assumed that the outer layers perceive normal stresses, and the average layer perceives the shear forces. In the derivation of governing equations we used variational Lagrange principle. According to this principle, the true moves of all the possible ones satisfying the boundary conditions, are the ones that give a minimum of the total energy. Total energy is the sum of the strain energy and the work of external forces. The problem is reduced to a system of linear algebraic equations. On the right side of this system there is the vector of the sum of the external nodal forces and the contribution of creep strains to the load vector. The calculations were performed in mathematical package Matlab. As the law for description of the relationship between stress and creep strain, we used linear creep theory of heredity. If the core of creep is exponential, the creep law can be written in differential form. This allows the calculation by step method using a linear approximation of the time derivative. The model problem has been solved for a spherical shell hinged along the contour. The relationship between the curvature of shell and the growth of deflections was analyzed. It was found out that for the shells of large curvature the creep has no appreciable effect on the deflections.

DOI: 10.22227/1997-0935.2015.7.17-24

References
  1. Kovalenko V.A., Kondrat’ev A.V. Primenenie polimernykh kompozitsionnykh materialov v izdeliyakh raketno-kosmicheskoy tekhniki kak rezerv povysheniya ee massovoy i funktsional’noy effektivnosti [The Use of Polymeric Composite Materials in Rocket and Space Technology as a Reserve to Increase Its Mass and Functional Efficiency]. Aviatsionno-kosmicheskaya tekhnika i tekhnologiya [Aerospace Technics and Technology]. 2011, no. 5, pp. 14—20. (In Russian)
  2. Leonenko D.V. Radial’nye sobstvennye kolebaniya uprugikh trekhsloynykh tsilindricheskikh obolochek [Radial Natural Vibrations of Elastic Three-Layer Cylindrical Shells]. Mekhanika mashin, mekhanizmov i materialov [Mechanics of Machines, Tools and Materials]. 2010, no. 3 (12), pp. 53—56. (In Russian)
  3. Bakulin V.N. Neklassicheskie utochnennye modeli v mekhanike trekhsloynykh obolochek [Non-classical Refined Models in the Mechanics of Sandwich Shells]. Vestnik Nizhegorodskogo universiteta im. N.I. Lobachevskogo [Vestnik of Lobachevsky State University of Nizhni Novgorod]. 2011, no. 4-5, pp. 1989—1991. (In Russian)
  4. Zemskov A.V., Pukhliy V.A., Pomeranskaya A.K., Tarlakovskiy D.V. K raschetu napryazhenno-deformirovannogo sostoyaniya trekhsloynykh obolochek peremennoy zhestkosti [Calculation of the stress-Strain State of Sandwich Shells with Variable Rigidity]. Vestnik Moskovskogo aviatsionnogo institute [Bulletin of Moscow Aviation Institute]. 2011, vol. 18, no. 1, p. 26. (In Russian)
  5. Kirichenko V.F. O sushchestvovanii resheniy v svyazannoy zadache termouprugosti dlya trekhsloynykh obolochek [Existence of the Solutions to a Connected Problem of Thermoelasticity of Sandwich Shells]. Izvestiya vysshikh uchebnykh zavedeniy. Matematika [Russian Mathematics]. 2012, no. 9, pp. 66—71. (In Russian)
  6. Sukhinin S.N. Matematicheskoe i fizicheskoe modelirovanie v zadachakh ustoychivosti trekhsloynykh kompozitnykh obolochek [Mathematical and physical Modeling in Problems оf Stability оf Three-Layer Composite Shells]. Vestnik Nizhegorodskogo universiteta im. N.I. Lobachevskogo [Vestnik of Lobachevsky State University of Nizhni Novgorod]. 2011, no. 4-5, pp. 2521—2522. (In Russian)
  7. Grigorenko Ya.M., Vasilenko A.T. O nekotorykh podkhodakh k postroeniyu utochnennykh modeley teorii anizotropnykh obolochek peremennoy tolshchiny [On Some Approaches to the Construction of the Specified Models of the Theory of Anisotropic Shells of Variable Thickness]. Matematichnі metodi ta fіziko-mekhanіchnі polya [Mathematical Methods and Physical-Mechanical Fields]. 2014, vol. 7, pp. 21—25. (In Russian)
  8. Bakulin V.N. Effektivnye modeli dlya utochnennogo analiza deformirovannogo sostoyaniya trekhsloynykh neosesimmetrichnykh tsilindricheskikh obolochek [Effective Models for Proximate Analysis of the Deformed State of Three-Layered Non-Axisymmetric Cylindrical Shells]. Doklady Akademii nauk [Reports of the Russian Academy of Sciences]. 2007, vol. 414, no. 5, pp. 613—617. (In Russian)
  9. Smerdov A.A., Fan Tkhe Shon. Raschetnyy analiz i optimizatsiya mnogostenochnykh kompozitnykh nesushchikh obolochek [Design Analysis and Optimization of Composite Bearing Shells]. Izvestiya vysshikh uchebnykh zavedeniy. Mashinostroenie [Proceedings of Higher Educational Institutions. Маchine Building]. 2014, no. 11 (656), pp. 90—98. (In Russian)
  10. Bakulin V.N. Postroenie approksimatsiy i modeley dlya issledovaniya napryazhenno-deformirovannogo sostoyaniya sloistykh neosesimmetrichnykh obolochek [Construction of Approximations and Models for Investigation of Stressed-Stained State of Layered Not- Axisymmetric Shells]. Matematicheskoe modelirovanie [Mathematical Modeling]. 2007, vol. 19, no. 12, pp. 118—128. (In Russian)
  11. Garrido M., Correia J., Branco F. Creep Behavior of Sandwich Panels with Rigid Polyurethane Foam Core and Glass-Fibre Reinforced Polymer Faces: Experimental Tests and Analytical Modeling. Journal of Composite Materials. 2013, pp. 21—28. DOI: http://dx.doi.org/10.1177/0021998313496593.
  12. Yazyev B.M., Chepurnenko A.S., Litvinov S.V., Yazyev S.B. Raschet trekhsloynoy plastinki metodom konechnykh elementov s uchetom polzuchesti srednego sloya [Calculation of Three-Layer Plates Using Finite Element Method Taking into Account the Creep of the Middle Layer]. Vestnik Dagestanskogo gosudarstvennogo tekhnicheskogo universiteta. Tekhnicheskie nauki [Herald of Dagestan State Technical University. Technical Sciences]. 2014, no. 33, pp. 47—55. (In Russian)
  13. Rabotnov Yu.N. Polzuchest’ elementov konstruktsiy [Creep of Structural Elements]. Moscow, Nauka Publ., 1966, 752 p. (In Russian)
  14. Kachanov L.M. Teoriya polzuchesti [Creep Theory]. Moscow, Fizmatgiz Publ., 1960, 680 p. (In Russian)
  15. Vol’mir A.S. Gibkie plastinki i obolochki [Flexible Plates and Shells]. Moscow, Izdatel’stvo Tekhniko-teoreticheskoy literatury Publ., 1956, 419 p. (In Russian)
  16. Andreev V.I., Yazyev B.M., Chepurnenko A.S. On the Bending of a Thin Plate at Nonlinear Creep. Advanced Materials Research. Trans Tech Publications, Switzerland. 2014, vol. 900, pp. 707—710. DOI: http://dx.doi.org/10.4028/www.scientific.net/AMR.900.707.
  17. Andreev V.I. Ob ustoychivosti polimernykh sterzhney pri polzuchesti [The Stability of Polymer Rods at Creep]. Mekhanika kompozitnykh materialov [Mechanics of Composite Materials]. 1968, no. 1, pp. 22—28. (In Russian)
  18. Chepurenko A.S., Andreev V.I., Yazyev B.M. Energeticheskiy metod pri raschete na ustoychivost’ szhatykh sterzhney s uchetom polzuchesti [Energy Method of Analysis of Stability of Compressed Rods with Regard for Creeping]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2013, no. 1, pp. 101—108. (In Russian)
  19. Andreev V.I., Yazyev B.M., Chepurnenko A.S. Osesimmetrichnyy izgib krugloy gibkoy plastinki pri polzuchesti [Axisymmetric Bending of a Round Elastic Plate in Case of Creep]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2014, no. 5, pp. 16—24. (In Russian)
  20. Kozel’skaya M.Yu., Chepurnenko A.S., Litvinov S.V. Raschet na ustoychivost’ szhatykh polimernykh sterzhney s uchetom temperaturnykh vozdeystviy i vysokoelasticheskikh deformatsiy [Stability Calculation of Compressed Polymer Rods with Account for Temperature Effects and Vysokoelaplastic Deformations]. Nauchno-tekhnicheskiy vestnik Povolzh’ya [Scientific and Technical Volga region Bulletin]. 2013, no. 4, pp. 190—194. (In Russian)

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PREDICTION OF MAXIMUM CREEP STRAIN OF HIGH PERFORMANCE STEEL FIBER REINFORCED CONCRETE

Vestnik MGSU 12/2012
  • Mishina Alexandra Vasil'evna - Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (NIISF RAACS) postgraduate student, Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (NIISF RAACS), 21 Lokomotivnyy proezd, Moscow, 127238, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Bezgodov Igor' Mikhaylovich - Moscow State University of Civil Engineering (MSUCE) Researcher, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Andrianov Aleksey Aleksandrovich - Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (NIISF RAACS) Candidate of Technical Sciences, Senior Researcher; +7 (495) 482-40-18, Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (NIISF RAACS), 21 Lokomotivnyy proezd, Moscow, 127238, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 66 - 70

The strongest research potential is demonstrated by the areas of application of high performance steel fiber reinforced concrete (HPSFRC). The research of its rheological characteristics is very important for the purposes of understanding its behaviour. This article is an overview of an experimental study of UHSSFRC. The study was carried out in the form of lasting creep tests of HPSFRC prism specimen, loaded by stresses of varied intensity. The loading was performed at different ages: 7, 14, 28 and 90 days after concreting. The stress intensity was 0.3 and 0.6 Rb; it was identified on the basis of short-term crush tests of similar prism-shaped specimen, performed on the same day. As a result, values of ultimate creep strains and ultimate specific creep of HPSFRC were identified. The data was used to construct an experimental diagramme of the ultimate specific creep on the basis of the HPSFRC loading age if exposed to various stresses. The research has resulted in the identification of a theoretical relationship that may serve as the basis for the high-precision projection of the pattern of changes in the ultimate specific creep of HPSFRC, depending on the age of loading and the stress intensity.

DOI: 10.22227/1997-0935.2012.12.66 - 70

References
  1. Beddar M. Fiber Reinforced Concrete: Past, Present and Future. Scientific works of the 2nd International conference on concrete and reinforced concrete. Moscow, 2005, vol. 3. pp. 228—234.
  2. Gorb A.M., Voylokov I.A. Fibrobeton – istoriya voprosa, normativnaya baza, problemy i resheniya [Fibre-reinforced Concrete – Background, Normative Base (Problems and Solutions)] ALITInform mezhdunarodnoe analiticheskoe obozrenie [ALITInform International Analytical Review]. 2009, no. 2, pp. 34—43.
  3. Almansour H., Lounus Z. Structural Performance of Precast Pre-stressed Bridge Girders Built with Ultra High Performance Concrete. Institute for Research in Construction. The Second International Symposium on Ultra High Performance Concrete. March 05-07, 2008. Kassel, Germany, pp. 822—830.
  4. Arafa M., Shihada S., Karmout M. Mechanical Properties of Ultra High Performance Concrete Produced in the Gaza Strip. Asian Journal of Materials Science, 2010, 2(1), pp. 1—12.
  5. Schmidt M., Fehling E. Ultra-high-performance Concrete: Research, Development and Application in Europe. ACI Special Publication, 2005, vol. 228, pp. 51—78.
  6. Mishina A.V., Andrianov A.A. Rabota vysokoprochnogo stalefi brobetona pri kratkovremennom zagruzhenii [Behaviour of High Strength Steel Fiber Concrete Exposed to Short-term Loading]. Fundamental’nye issledovaniya RAASN po nauchnomu obespecheniyu razvitiya arkhitektury, gradostroitel’stva i stroitel’noy otrasli Rossiyskoy Federatsii v 2011 g. [Fundamental Researches of RAACS in Architecture, Town Planning and Construction Industry of the Russian Federation in 2011]. Moscow, MGSU Publ, 2012, vol. 2, pp. 76—78.
  7. Pukharenko Yu.V., Golubev V.Yu. Vysokoprochnyy stalefi brobeton [High Strength Steel Fiber Reinforced Concrete] Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2007, no. 9, pp. 40—41.
  8. Mishina A.V., Chilin I.A., Andrianov A.A. Fiziko-tekhnicheskie svoystva sverkhvysokoprochnogo stalefibrobetona [Physical Technical Properties of High Performance Steel Fiber Reinforced Concrete] Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2011, no. 3, pp. 159—165.
  9. GOST 24544—81. Betony. Metody opredeleniya deformatsiy usadki i polzuchesti [State Standard 24544—81. Concretes. Methods of Identification of Creep and Shrinkage Strain].
  10. Karpenko N.I., Romkin D.S. Sovremennye metody opredeleniya deformatsiy polzuchesti novykh vysokoprochnykh betonov [Advanced Methods of identification of Deformations of Creep of Highperformance Concretes]. Fundamental’nye issledovaniya RAASN po nauchnomu obespecheniyu razvitiya arkhitektury, gradostroitel’stva i stroitel’noy otrasli Rossiyskoy Federatsii v 2011 g. [Fundamental Researches of RAACS in Architecture, Town Planning and Construction Industry of the Russian Federation in 2011]. Moscow, MGSU Publ, 2012, vol. 2, pp. 83—87.
  11. Romkin D.S. Vliyanie vozrasta vysokoprochnogo betona na ego fiziko-mekhanicheskie I reologicheskie svoystva [Infl uence of Age of High-strength Concrete on its Physical, Mechanical and Rheological Properties]. Moscow, 2010, 12 p.

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Axisymmetric bending of a round elastic plate in case of creep

Vestnik MGSU 5/2014
  • Andreev Vladimir Igorevich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, corresponding member of Russian Academy of Architecture and Construction Sciences, chair, Department of Strength of Materials, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Yazyev Batyr Meretovich - Rostov State University of Civil Engineering (RSUCE) Doctor of Technical Sciences, Professor, Chair, Depart- ment of Strength of Materials; +7 (863) 201-91-09, Rostov State University of Civil Engineering (RSUCE), 162 Sotsialisticheskaya St., Rostov-on-Don, 344022, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Chepurnenko Anton Sergeevich - Don State Technical University (DGTU) Candidate of Engineering Science, teaching assistant of the strength of materials department, Don State Technical University (DGTU), 162 Sotsialisticheskaya str., Rostov-on-Don, 344022; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 16-24

In the article the problem of bending of circular axially loaded flexible plate during creep was solved. The solution is reduced to a system of two nonlinear differential equations. These equations are suitable for arbitrary dependencies between tensions and creep deformations. The system was solved by the method of successive approximations in conjunction with the finite difference method. Calculations were performed with the help of software package Matlab. We considered round rigidly clamped along the contour plate, which was loaded by the load uniformly distributed over the area. Polymer EDB-10 was taken as a material, which obeys the Maxwell-Gurevich physical law. Creep strains at each point of time were found using linear approximation. In order to verify the correctness of the program, we compared the elastic solution with the result of Professor A. Volmir. He solved this problem by the method of Bubnov-Galerkin only taking into account the geometric nonlinearity. Our results are in good agreement with the solution of. A. Volmir.It is revealed that the calculation excluding geometric nonlinearity gives high values of deflections. The analysis of the equations for t→∞ showed that in linear geometric theory stresses across the thickness of the plate at the end of the creep change linearly. Also the formula for long cylindrical rigidity was obtained. This formula allows us to find the deflection at the end of the creep process, if we know the elastic solution. It is shown that long cylindrical rigidity depends not only on the long elastic modulus v , but also on short elastic modulus v and Poisson's ratio v . It was also found out that in case of high loads stress distribution across the thickness is nonlinear.

DOI: 10.22227/1997-0935.2014.5.16-24

References
  1. Rabotnov Yu.N. Polzuchest' elementov konstruktsiy [Creep of Structural Elements]. Moscow, Nauka Publ. 1966, 752 p.
  2. Bazhanov V.L., Gol'denblat I.I., Kopnov V.A., Pospelov A.O., Sinyukov A.M. Plastinki i obolochki iz stekloplastikov [Plates and Shells of Fiberglass]. Moscow, Vysshaya shkola Publ., 1970, 408 p.
  3. Teregulov I.G. Izgib i ustoychivost' tonkikh plastin i obolochek pri polzuchesti [Bending and Stability of Thin Plates and Shells under Creep]. Moscow, Nauka Publ., 1969, 206 p.
  4. Kachanov L.M. Teoriya polzuchesti [Creep Theory]. Fizmatgiz, 1960, 680 p.
  5. Nemirovskiy Yu.V., Yankovskiy A.P. Ravnonapryazhennoye armirovaniye metallokompozitnykh plastin pri ustanovivsheysya polzuchesti [Equal-stress Reinforcement of Metal Composite Plates at Steady Creep]. Problemy prochnosti i plastichnosti [Problems of Strength and Plasticity]. 2007, vol. 69, pp. 70—78.
  6. Lellep Ya. Ustanovivshayasya polzuchest' kruglykh i kol'tsevykh plastin, vypolnennykh iz raznomodul'nogo neuprugogo materiala [Steady Creep of Round and Circular Plates Made of Inelastic Multimodulus Material]. Uchenye zapiski Tartuskogo universiteta [Teaching Notes of Tartu University]. 1974, no. 342, pp. 323—333.
  7. Belov A.V., Polivanov A.A., Popov A.G. Otsenka rabotosposobnosti mnogosloynykh plastin i obolochek s uchetom povrezhdayemosti materialov vsledstviye polzuchesti i vysokotemperaturnoy vodorodnoy korrozii [Assessment of Performance of Multi-layer Wafers and Shells Based on Damage of Materials due to Creep and High-temperature Hydrogen Corrosion]. Sovremennyye problemy nauki i obrazovaniya [Contemporary Problems of Science and Education]. 2007, no. 4, pp. 80—85.
  8. Andreev V.I., Yazyev B.M., Chepurnenko A.S. On the Bending of a Thin Plate at Nonlinear Creep. Advanced Materials Research. 2014, vol. 900, pp. 707—710. Trans Tech Publications, Switzerland.
  9. Altenbach H., Morachkovsky O., Naumenko K., Sychov A. Geometrically Nonlinear Bending of Thin-walled Shells and Plates under Creep-damage Conditions. Archive of Applied Mechanics. 1997, vol. 67, no. 5, pp. 339—352. DOI: 10.1007/s004190050122.
  10. Altenbach H., Naumenko K. Creep Bending of Thin-walled Shells and Plates by Consideration of Finite Deflections. Computational Mechanics. 1997, no. 19(6), pp. 490—495. DOI: 10.1007/s004660050197.
  11. Altenbach H., Huang C., Naumenko K. Creep-damage Predictions in Thin-walled Structures by Use of isotropic and Anisotropic Damage Models. The Journal of Strain Analysis for Engineering Design. 2002, vol. 37, no. 3, pp. 265—275. DOI: 10.1243/0309324021515023.
  12. Altenbach H., Altenbach J., Naumenko K. On the Prediction of Creep Damage by Bending of Thin-walled Structures. Mechanics of Time-Dependent Materials. 1997, vol. 1, no. 2, pp. 181—193. DOI: 10.1023/A:1009794001209.
  13. Vol'mir A.S. Gibkiye plastinki i obolochki. [Flexible plates and shells]. Moscow, Publishing House of Technical and theoretical literature, 1956, 419 p.
  14. Rabinovich A.L. Vvedeniye v mekhaniku armirovannykh polimerov [Introduction of Reinforced Polymers into Mechanics]. Moscow, Nauka Publ., 1970, 482 p.
  15. Freydin A.S., Turusov R.A. Adgesionnaya prochnost’ materialov [The Adhesion Strength of Materials]. Мoscow, 1976, 238 p.

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ESTIMATION OF CREEPING RESISTANCE OF AN ADHESIVE LAYER BASED ON DRY MORTAR

Vestnik MGSU 4/2016
  • Loganina Valentina Ivanovna - Penza State University of Architecture and Construction Doctor of Technical Sciences, Professor, Head of the Department of Quality Management and Technology of Construction Production, Penza State University of Architecture and Construction, 28 G. Titova st., Penza, 440028, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Zhegera Kristina Vladimirovna - Penza State University of Architecture and Construction (PGUAS) postgraduate student, Department of Quality Management and Technologies of the Construction, Penza State University of Architecture and Construction (PGUAS), 28 Germana Titova str., Penza, 440028, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 69-75

The development of construction materials with increased operational properties is a priority direction of Russian modern structural material science. Dry mortars are among such materials. Various modifiers are added to the formulae of such mixes in order to control their structure formation and increase the operational properties. Previous investigations proved the efficiency of adding synthetic zeolites to the composition of dry mortars. The authors of the article have developed a formula of a dry mortar to be used as a tile adhesive for facades’ and inner walls’ facing. The authors evaluated the operational properties of tile adhesive layer based on dry cement mortar. The authors calculated the value of adhesive layer creep based on the developed dry cement mortar formula, which was spread over a vertical surface. The experimental data is presented in the article. The calculations and the experimental data proved that the adhesive layer based on dry cement mortar possesses a high creeping resistance.

DOI: 10.22227/1997-0935.2016.4.69-75

References
  1. Strokova V.V., Vezentsev A.I., Kolesnikov D.A., Shimanskaya M.S. Svoystva sinteticheskikh nanotubulyarnykh gidrosilikatov [Properties of Synthetic Nanotubular Hydrosilicates]. Vestnik Belgorodskogo tekhnologicheskogo universiteta im. V.G. Shukhova [Proceedings of Belgorod State Technological University named after V.G. Shoukhov]. 2010, no. 4, pp. 30—34. (In Russian)
  2. Loganina V.I., Davydova O.A., Simonov E.E. Issledovanie zakonomernostey vliyaniya zolya kremnievoy kisloty na strukturu i svoystva diatomita [Investigation of the Regularities of Silica Sol Influence on the Structure and Properties of Diatomite]. Stroitel’nye materialy [Construction Materials]. 2011, no. 12, p. 63. (In Russian)
  3. Aiello R., Collela C., Sersale R. Zeolite Formation from Synthetic and Natural Glasses. Molecular Sieve Zeolites. Advances Chem. Ser. Washington. 1971, no. 101, pp. 51—62. DOI: http://dx.doi.org/1021/ba-1971-0101.ch004.
  4. Zhdanov S.P. Some Problems of Zeolite Crystallization. Molecular Sieve Zeolites. Advances Chem. Ser. Washington,1971, pp. 20—43. DOI: http://dx.doi.org/10.1021/ba-1971-0101.ch002.
  5. Fakhrtdinova O.A., Nazarenko O.B., Martem’yanov D.V., Putenpurakalchira M.V. Issledovanie svoystv modifitsirovannogo shivyrtuyskogo tseolita [Investigation of the Properties of modified Shivyrtuysk Zeolite]. Energetika: effektivnost’, nadezhnost’, bezopasnost’ :materialy XX Vserossiyskoy nauchno-tekhnicheskoy konferentsii (Tomsk, 2—4 dekabrya 2014 g.) [Energy: Efficiency, Stability, Safety: Materials of the 20th All-Russian Science and Technical Conference (Tomsk, 2—4 December 2014)]. Tomsk, TPU Publ., 2014, vol. 2, pp. 114—116. (In Russian)
  6. Hardi G. Kreplenie plitok kleyami, modifitsirovannymi redispergiruemymi poroshkami [Fixing Tiles Using Adhesives Modified by Redispersible Powders]. Sovremennye tekhnologii sukhikh smesey v stroitel’stve : sbornik dokladov 2-y Mezhdunarodnoy nauchno-tekhnicheskoy konferentsii [Modern Dry Mixes Technologies in the Construction : Collection of Reports of the 2nd International Science and Technical Conference]. Saint Petersburg, 2000, pp. 70—77. (In Russian)
  7. Karapuzov E.K., Lutts G., Gerol’d Kh. Sukhie stroitel’nye smesi [Dry Mortars]. Kiev, Tekhnika Publ., 2000, 226 p. (In Russian)
  8. Doroshenko, Yu.M., Shanaev Zh.I. Protsessy strukturoobrazovaniya i svoystva tsementnogo kamnya s polimernymi modifikatorami [The Processes of Structure Formation and Properties of Cement Stone with Polymer Modifiers]. 15 Szilikatip. esszilikattund. konf. (12—16 jun., 1989): SILICONF R.l. Budapest, 1989, pp. 273—276. (In Russian)
  9. Kaeding W.W., Chu C.-C., Young L.B., Butter S.A. Shape-Selective Reactions with Zeolite Catalysts: II. Selective Disproportionation of Toluene to Produce Benzene and P-Xylene. J. Catal. 1981, vol. 69, no. 2, pp. 392—398. DOI: http://dx.doi.org/10.1016/0021-9517(81)90174-3.
  10. Kjellsen K.O., Lagerblad B. The Influence of Natural Minerals in the Filler Fraction on Hydratation and Properties of Cement-Filler Mortars. Swedish Cement and Concrete Research Institut. Stockholm, 1995, p. 41.
  11. Loganina V.I., Zhernovskiy V.I., Sadovnikova M.A., Zhegera K.V. Dobavka na osnove alyumosilikatov dlya tsementnykh sistem [Additive Based on Aluminum Silicates for Cement Systems]. Vostochno-Evropeyskiy zhurnal peredovykh tekhnologiy [East-European Journal of High Technologies]. 2013, vol. 5, no. 6, pp. 8—11. (In Russian)
  12. Zhegera K.V. Svoystva tsementnykh sukhikh stroitel’nykh smesey pri vvedenii v ikh retsepturu sintezirovannykh alyumosilikatov [The Properties of Dry Cement Mixes with the Introduction of Synthesized Aluminum Silicates to their Composition]. Molodoy uchenyy [Young Scientist]. 2014, no. 3 (62), pp. 278—280. (In Russian)
  13. Loganina V.I., Zhegera K.V. Formirovanie prochnosti tsementnoy kompozitsii v prisutstvii sintezirovannykh alyumosilikatov [Strength Formation of a Cement Composition with Synthesized Aluminum Silicates]. Vestnik Yuzhno-Ural’skogo gosudarstvennogo universiteta. Seriya: Stroitel’stvo i arkhitektura [Proceedings of South Ural State University. Series: Construction and Architecture]. 2015, vol. 15, no. 2, pp. 43—46. (In Russian)
  14. Loganina V.I., Ariskin M.V., Karpova O.V., Zhegera K.V. Otsenka napryazhennogo sostoyaniya kleevogo sloya na osnove sukhikh stroitel’nykh smesey s primeneniem sintezirovannykh alyumosilikatov [Evaluation of the Stress State of the Adhesive Layer on the Basis of Dry Mixes Using Synthesized Aluminum Silicates]. Vestnik grazhdanskikh inzhenerov [Bulletin of Civil Engineers]. 2015, no. 3 (50), pp. 163—166. (In Russian)
  15. Kozlov V.V. Sukhie stroitel’nye smesi [Dry Mortars]. Moscow, ASV Publ., 2000, 96 p. (In Russian)
  16. Gorchakov, G.I., Orentlikher L.P., Muradov E.G. Treshchinostoykost’ i vodostoykost’ legkikh betonov [Crack Resistance and Water Resistance of Lightweight Concretes]. Moscow, Stroyizdat Publ., 1971, 80 p. (In Russian)
  17. Druzhinkin S.V. Sukhie stroitel’nye smesi na osnove tseolitsoderzhashchikh porod: dissertatsiya kanddata tekhnicheskikh nauk: 05.23.05 [Dry Construction Mixtures Based on Zeolite-Containing Rocks : Dissertation of the Candidate of Technical Sciences: 05.23.05]. Krasnoyarsk, 2010, 169 p. (In Russian)
  18. Sommer H., Katayama T. Screening Carbonate Aggregates for Alkali-Reactivity. IBAUSIL 13. Weimar, BRD, 2000, Bd. 2, pp. 2-0461— 2-0468.
  19. Ogawa K., Uchikawa H., Takemoto K. and Yasui I. The Mechanism of the Hydration in the System C3S-Pozzolana. Cem. Concr. Res. 1980, 10 (5), pp. 683—696. DOI: http://dx.doi.org/10.1016/0008-8846(80)90032-0.
  20. Rajgelj S. Cohesion Aspects in Rheological Behaviour of Fresh Cement Mortars. Materials and Structures. 1985, 18 (2), pp. 109—114. DOI: http://dx.doi.org/10.1007/BF02473377.

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Prediction of stress-strain state of municipal solid waste with application of soft soil creep model

Vestnik MGSU 9/2014
  • Ofrikhter Vadim Grigor'evich - Perm National Research Polytechnical University (PNRPU) Candidate of Technical Sciences, Associate Professor, Department of Construction Operations and Geotechnics, Perm National Research Polytechnical University (PNRPU), 29 Komsomol'skiy prospekt, Perm, 614990, Russian Federation; +7 (342) 219-83-74; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Ofrikhter Yan Vadimovich - Perm National Research Polytechnical University (PNRPU) student, Construction Department, Perm National Research Polytechnical University (PNRPU), 29 Komsomol'skiy prospekt, Perm, 614990, Russian Federation; +7 (342) 219-83-74; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 82-92

The deformation of municipal solid waste is a complex process caused by the nature of MSW, the properties of which differ from the properties of common soils. The mass of municipal solid waste shows the mixed behaviour partially similar to granular soils, and partially - to cohesive. So, one of mechanical characteristics of MSW is the cohesion typical to cohesive soils, but at the same time the filtration coefficient of MSW has an order of 1 m/day that is characteristic for granular soils. It has been established that MSW massif can be simulated like the soil reinforced by randomly oriented fibers. Today a significant amount of the verified and well proved software products are available for numerical modelling of soils. The majority of them use finite element method (FEM). The soft soil creep model (SSC-model) seems to be the most suitable for modelling of municipal solid waste, as it allows estimating the development of settlements in time with separation of primary and secondary consolidation. Unlike the soft soil, one of the factors of secondary consolidation of MSW is biological degradation, the influence of which is possible to consider at the definition of the modified parameters essential for soft soil model. Application of soft soil creep model allows carrying out the calculation of stress-strain state of waste from the beginning of landfill filling up to any moment of time both during the period of operation and in postclosure period. The comparative calculation presented in the paper is executed in Plaxis software using the soft-soil creep model in contrast to the calculation using the composite model of MSW. All the characteristics for SSC-model were derived from the composite model. The comparative results demonstrate the advantage of SSC-model for prediction of the development of MSW stress-strain state. As far as after the completion of the biodegradation processes MSW behaviour is similar to cohesion-like soils, the demonstrated approach seems to be useful for the design of waste piles as the basement for different constructions considering it as one of remediation techniques for the territories occupied by the old waste.

DOI: 10.22227/1997-0935.2014.9.82-92

References
  1. Kockel R., Jessberger H.L. Stability Evaluation of Municipal Solid Waste Slopes. Proceedings of 11th European Conference for Soil Mechanics and Foundation Engineering. Copenhagen, Denmark, Danish Geotechnical Society, 1995, vol. 2, pp. 73—78.
  2. Manassero M., Van Impe W.F, Bouazza A. Waste Disposal and Containment. Proceedings of 2nd International Congress on Environmental Geotechnics. Rotterdam, A.A. Balkema, 1996, vol. 3, pp. 1425—1474.
  3. Sivakumar Babu G.L., Reddy K.R., Chouskey S.K., Kulkarni H.S. Prediction of Longterm Municipal Solid Waste Landfill Settlement Using Constitutive Model. Practice Periodical of Hazardous, Toxic and Radioactive Waste Management. New York, ASCE, 2010, vol. 14, no. 2, pp. 139—150. DOI: http://dx.doi.org/10.1061/(ASCE)HZ.1944-8376.0000024.
  4. Sivakumar Babu G.L., Reddy K.R., Chouskey S.K. Constitutive Model for Municipal Solid Waste Incorporating Mechanical Creep and Biodegradation-induced Compression. Waste Management. Amsterdam, Elsevier, 2010, vol. 30, no. 1, pp. 11—22. DOI: http://dx.doi.org/10.1016/j.wasman.2009.09.005.
  5. Sivakumar Babu G.L., Reddy K.R., Chouskey S.K. Parametric Study of MSW Landfill Settlement Model. Waste Management. Amsterdam, Elsevier, 2011, vol. 31, no. 6, pp. 1222—1231. DOI: http://dx.doi.org/10.1016/j.wasman.2011.01.007.
  6. Sivakumar Babu G.L. Evaluation of Municipal Solid Waste Characteristics of a Typical Landfill in Bangalore. Bangalore, India, India Institute of Science, 2012. Available at: http://cistup.iisc.ernet.in/presentations/Research%20project/CIST038.pdf/. Date of access: 02.04.2014.
  7. Brinkgreve R.B.J., Vermeer P. On the Use of Cam-Clay Models. Proceedings of the IV International Symposium on Numerical Models in Geomechanics. Rotterdam, Balkema, 1992, vol. 2, pp. 557—565.
  8. Burland J.B. The Yielding and Dilation of Clay. Geotechnique, London, Thomas Telford Limited, 1965, vol. 15, no. 3, pp. 211—214.
  9. Burland J.B. Deformation of Soft Clay. PhD thes. Cambridge, UK, Cambridge University, 1967, 500 p.
  10. Brinkgreve R.B.J. Material Models. Plaxis 2D — Version 8. Rotterdam, A.A. Balkema, 2002, pp. 6-1—6-20.
  11. Brinkgreve R.B.J. Geomaterial Models and Numerical Analysis of Softening, Dissertation. Delft, Delft University of Technology, 1994. Available at: http://adsabs.harvard.edu/abs/1994PhDT........15B/. Date of access: 02.04.2014.
  12. Stolle D.F.E., Bonnier P.G., Vermeer P.A. A Soft Soil Model and Experiences with Two Integration Schemes. Numerical Models in Geomechanics. Leiden, Netherlands, CRC Press, 1997, pp. 123—128.
  13. Gibson R.E., Lo K.Y. A Theory of Soils Exhibiting Secondary Compression. Acta Polytechnica Scandinavica, Civil Engineering and Building Construction Series. Stockholm, Scandinavian Council for Applied Research, 1961, C 10, 196, pp. 225—239.
  14. Park H.I., Lee S.R. Long-term Settlement Behavior of Landfills with Refuse Decomposition. Journal of Solid Waste Technology and Management. Chester, USA, Widener University, 1997, vol. 24, no. 4, pp. 159—165.
  15. Murthy V.N.S. Geotechnical Engineering: Principles and Practices of Soil Mechanics and Foundation Engineering. New York, Marcel Dekker, Inc., 2003, 1056 p.

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Interaction between anchors and surrounding soil with account for creep and structural shear strength

Vestnik MGSU 10/2014
  • Ter-Martirosyan Zaven Grigor’evich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Science, Professor of the Department of Soil Mechanics and Geotechnics, Main Researcher at the Research and Education Center “Geotechnics”, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Avanesov Vadim Sergeevich - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Soil Mechanics and Geotechnics, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; +7 (495) 287-49-14 (ext. 14-25); This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 75-86

Interaction between grouted prestressed anchor and surrounding soil body with account for creep and structural shear strength is investigated in this paper. The behavior of the system is described by the modified rheological Bingham-Shvedov equation. It is shown that fixation of initial tension or its periodical variation causes problem of anchor creep and stability, and fixation of initial displacement causes initial stress relaxation of the system “surrounding soil body - anchor - tendon”. The relaxation time significantly depends on elastic-viscoplastic properties of surrounding soil, diameter and length of anchor and tendon, and its elasticity. Account for viscoplastic properties of soil with the structural shear strength leads to residual stresses in the system. The solutions of these problems can be used for quantitative estimation for stress-strain state of the system. This estimation makes it possible to calculate long-term deformation and bearing capacity of anchors, stress relaxation and residual stresses. The problem of interaction between anchor and the surrounding soil is solved in this paper. It is shown that displacement of anchor and stresses in the soil depends on different parameters, such as soil properties, geometrical properties of the anchor, selection of design model and account for ultimate stiffness of the anchor. Also this solution is basic for problems of creep and stress relaxation in the system. The process of formation of the stress-strain state around the anchor could demonstrate decaying, constant or progressive velocity highly depending on rheological processes in the soil body that may at the same time be accompanied by hardening and softening processes.

DOI: 10.22227/1997-0935.2014.10.75-86

References
  1. Levachev S.N., Haletskiy V.S. Ankernye i yakornye ustroystva v gidrotekhnicheskom stroitel’stve [Tie and Anchor Devices in Hydraulic Engineering]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2011, no. 5, pp. 58—68. (in Russian)
  2. Sabatini P.J., Pass D.G., Bachus R.C. Ground Anchors and Anchored Systems. Geotechnical Engineering Circular. 1999, no. 4, 281 p.
  3. Barley A.D., Windsor C.R. Recent Advances in Ground Anchor and Ground Reinforcement Technology with Reference to the Development of the Art. GeoEng. 2000, vol. 1: Invited papers, pp. 1048—1095.
  4. Copstead R.L., Studier D.D. An Earth Anchor System: Installation and Design Guide. United States Department of Agriculture. 1990, 35 p.
  5. Chim-oye W., Marumdee N. Estimation of Uplift Pile Capacity in the Sand Layers. International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies. 2013, vol. 4, no. 1, pp. 57—65.
  6. Yimsiri S., Soga K., Yoshizaki K., Dasari G.R., O’Rourke T.D. Lateral and Upward Soil-Pipeline Interactions in Sand for Deep Embedment Conditions. Journal of Geotechnical and Geoenvironmental Engineering. 2004, vol. 130, issue 8, pp. 830—842. DOI: http://dx.doi.org/10.1061/(ASCE)1090-0241(2004)130:8(830).
  7. Zhang B., Benmokrane B., Chennouf A., Mukhopadhyaya P., El-Safty P. Tensile Behavior of FRP Tendons for Prestressed Ground Anchors. Journal Of Composites For Construction. 2001, vol. 5, no. 2, pp. 85—93. DOI: http://dx.doi.org/10.1061/(ASCE)1090-0268(2001)5:2(85).
  8. Hoyt R.M., Clemence S.P. Uplift Capacity of Helical Anchors in Soil. 12th International Conference on Soil Mechanics and Foundation Engineering. 1989, 12 p.
  9. Hanna A., Sabry M. Trends in Pullout Behavior of Batter Piles in Sand. Proceeding of the 82 Annual Meeting of the Transportation Research Board. 2003, 13 p.
  10. Thorne C.P., Wang C.X., Carter J.P. Uplift Capacity of Rapidly Loaded Strip Anchors in Uniform Strength Clay. Geotechnique. 2004, vol. 54, no. 8, pp. 507—517.
  11. Young J. Uplift Capacity and Displacement of Helical Anchors in Cohesive Soil. A Thesis Submitted to Oregon State University, 2012. Available at: http://hdl.handle.net/1957/29487. Date of access: 25.06.2014.
  12. Briaud J.L., Powers W.F., Weatherby D.E. Dolzhny li in”ektsionnye gruntovye ankery imet’ nebol’shuyu dlinu zadelki i tyagi? [Should Grouted Anchors Have Short Tendon Bond and Rod Length?]. Geotekhnika [Geotechnics]. 2012, no. 5, pp. 34—55. (in Russian)
  13. Ter-Martirosyan Z.G., Ter-Martirosyan A.Z. Reologicheskie svoystva gruntov pri sdvige [Rheological Properties of Soils while Shearing]. OFMG [Bases, Foundations and Soil Mechanics]. 2012, no. 6, pp. 9—13. (in Russian)
  14. Ter-Martirosyan Z.G., Nguyen Giang Nam. Vzaimodeystvie svay bol’shoy dliny s neodnorodnym massivom s uchetom nelineynykh i reologicheskikh svoystv gruntov [Interaction between Long Piles and a Heterogeneous Massif with Account for Non-linear and Rheological Properties of Soils]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2008, no. 2, pp. 3—14. (in Russian)
  15. Ter-Martirosyan Z.G. Mekhanika gruntov [Soil Mechanics]. Moscow, ASV Publ., 2009, 550 p. (in Russian)

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Сalculation theory for shrinkage stresses in cellular concrete wall panels in carbonation processes with account of creep

Vestnik MGSU 12/2016
  • Bataev Dena Kerim-Sultanovich - Complex Institute named after Kh.I. Ibragimov of the Russian Academy of Sciences (CI RAS) Doctor of Engineering, professor, academician of the Academy of Sciences of the Chechen Republic, director, Complex Institute named after Kh.I. Ibragimov of the Russian Academy of Sciences (CI RAS), 21a Staropromyslovsky shosse, Grozny, 364051, Chechen Republic.
  • Gaziev Minkail Akhmetovich - Grozny State Technological Oil University named after Academician M.D. Millionshchikov (GSTOU named after Academician M.D. Millionshchikov) Candidate of Engineering, associate professor of the building structures department, Grozny State Technological Oil University named after Academician M.D. Millionshchikov (GSTOU named after Academician M.D. Millionshchikov), 100 Ordzhonikidze square, Grozny, 364051, Chechen Republic.
  • Pinsker Vadim Aronovich - Centre for cellular concretes at NP “North-West Construction Chamber” Candidate of Engineering, scientific adviser, Centre for cellular concretes at NP “North-West Construction Chamber”, off. 308, 1/3 Zodchego Rossi str., Saint-Petersburg, 191023; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Chepurnenko Anton Sergeevich - Don State Technical University (DGTU) Candidate of Engineering Science, teaching assistant of the strength of materials department, Don State Technical University (DGTU), 162 Sotsialisticheskaya str., Rostov-on-Don, 344022; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 11-22

The task of comprehensive analysis presented in this article is a development of theory of calculation of shrinkage stresses in cellular concrete wall panels; such stresses occur due to carbonation of concrete because of the creep of material. Analytical dependences characterizing the influence of carbonation on the modulus of elasticity, shrinkage and creep of autoclaved cellular concrete, as well as the regularity of variation of carbonation degree as per thickness of the wall panels depending on time, were obtained. The proposed theory of calculation of shrinkage stresses in cellular concrete wall panels, with account of concrete creep, makes it possible to predict the influence of carbonation processes on crack resistance thereof, and thus to develop measures of technological and structural nature, in order to improve their operational reliability and durability.

DOI: 10.22227/1997-0935.2016.12.11-22

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CREEP AND LONG-TERM BEARING CAPACITY OF LONG PILES SUBMERGED INTO THE CLAY SOIL MASSIF

Vestnik MGSU 1/2013
  • Ter-Martirosyan Zaven Grigor’evich - Moscow State University of Civil Engineering (MGSU) +7 (499) 261-59-88, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Sidorov Vitaliy Valentinovich - National Research Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, Assistant Professor of the Department Soil Mechanics and Geotechnics, Researcher at the Research and Education Center «Geotechnics», National Research Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Ter-Martirosyan Karen Zavenovich - Moscow State University of Civil Engineering (MGSU) postgraduate student, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 109-115

Interaction between long piles and the adjacent soil has a spatial and temporal nature. This phenomenon is based on a set of non-linear and rheological properties of soils. Distribution of lateral forces between the surface and the pile toe is heavily dependent on the above properties. The process of formation of the stress-strain state around the pile can demonstrate decaying, constant or progressive velocity depending on the rheological processes in the soil that may be accompanied by hardening and softening processes at one and the same time. These processes may be caused by destruction and restoration of ties between clay soil particles, soil compaction and de-compaction. Predominance of the process of hardening leads to damping, while predominance of the process of softening causes progressive destruction. Description of this multi-component process depends on the rheological model of the soil. This research is based on the modified rheological model originally designed by Maxwell. The authors consider solutions to the problem of quantification of the stressstrain state of soil around the pile and their interaction. This research makes it possible to project motion patterns of long piles over the time and evaluate the limit of their long-term bearing capacity.

DOI: 10.22227/1997-0935.2013.1.109-115

References
  1. Vyalov S.S. Reologicheskie osnovy mekhaniki gruntov [Rheological Fundamentals of Soil Mechanics]. Moscow, Vyssh. shk. publ.,1978, 442 p.
  2. Meschyan S.R. Eksperimental’nye osnovy reologii glinistykh gruntov [Experimental Fundamentals of Rheology of Clay Soils]. Moscow, 2008, 805 p.
  3. Ter-Martirosyan Z.G. Mekhanika gruntov [Soil Mechanics]. Moscow, ASV Publ., 2009, 550 p.
  4. Ter-Martirosyan Z.G., Nguen Zang Nam. Vzaimodeystvie svay bol’shoy dliny s neodnorodnym massivom s uchetom nelineynykh i reologicheskikh svoystv gruntov [Interaction between Long Piles and a Heterogeneous Massif with Account for Non-linear and Rheological Properties of Soils]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2008, no. 2, pp. 3—14.

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СONSOLIDATION AND CREEPOF SUBFOUNDATIONS HAVING FINITE WIDTHS

Vestnik MGSU 4/2013
  • Ter-Martirosyan Zaven Grigor’evich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Science, Professor of the Department of Soil Mechanics and Geotechnics, Main Researcher at the Research and Education Center “Geotechnics”, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Ter-Martirosyan Armen Zavenovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor of the Department of Soil Mechanics and Geotechnics, Head of Research and Education Center “Geotechnics”, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Nguyen Huy Hiep - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Soil Mechanics, Subfoundations and Foundations, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 38-52

The authors formulate and solve the problem of consolidation and creep of saturated clay subfoundations exposed to localized loads (the two-dimensional problem formulation). The findings have proven that, if the two-dimensional problem is considered, any excessive pore pressure is concentrated immediately under the area exposed to the localized loading, and it penetrates into the depth equal to 1/2 of the strength of the compressed width. Subfoundation subsidence is caused by both shear and 3D deformations of soil. Besides, the ratio of shear-to-3D deformations reaches 10. Therefore, the authors propose to represent the subfoundation subsidence as the sum of shear and 3D deformations.The differential equation of the filter consolidation, if considered as the 2D problem, is solved using the Mathcad software. The software is used to analyze the isolines of excessive pore pressure at any moment following the loading application. New depen- dence representing the ratio of the changing area of the diagram of the average effective tension to the area of the diagram of the average tension in the stabilized condition is proposed by the authors.In the final section of the article, the authors solve the problem of prognostication of the subsidence pattern for the water saturated subfoundation with account for the shear creep of the soil skeleton. The authors employ the visco-elastic Bingham model characterized by time-dependent viscosity ratios. The authors have proven that in this case the subsidence following the shear load will develop as of the moment of application of the external load pro rata the logarithm of time irrespectively of the process of filtration consolidation.

DOI: 10.22227/1997-0935.2013.4.38-52

References
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  2. Florin V.A. Osnovy mekhaniki gruntov [Fundamentals of Soil Mechanics]. Moscow, Stroyizdat Publ., 1959, vol. 1.
  3. Tsytovich N.A. Mekhanika gruntov [Soil Mechanics]. Moscow, Stroyzdat Publ., 1963, 636 p.
  4. Zaretskiy Yu.K. Vyazko-plastichnost’ gruntov i raschety sooruzheniy [Visco-plasticity of Soils and Analysis of Structures]. Moscow, Stroyizdat Publ., 1988, 350 p.
  5. SP 22.13330.2011. Osnovaniya zdaniy i sooruzheniy. [Construction Regulations 22.13330.2011. Subfoundations of Buildings and Structures]. Moscow, 2011, 85 p.
  6. Tikhonov A.N., Samarskiy A.A. Uravneniya matematicheskoy fiziki [Equations of Mathematical Physics]. Moscow, Nauka Publ., 1996, 724 p.
  7. Ter-Martirosyan Z.G. Mekhanika gruntov [Soil Mechanics]. Moscow, ASV Publ., 2009, 550 p.
  8. Ter-Martirosyan A.Z. Vzaimodeystvie fundamentov s osnovaniem pri tsiklicheskikh i vibratsionnykh vozdeystviyakh s uchetom reologicheskikh svoystv gruntov [Interaction between Foundations and Subfoundations in Case of Cyclical and Vibration Exposures with Account for Rheological Properties of Soils]. Moscow, MGSU Publ., 2010.
  9. Vyalov S.S. Reologicheskie osnovy mekhaniki gruntov [Rheological Fundamentals of Soil Mechanics]. Moscow, Vysshaya shkola publ., 1978, 447 p.
  10. Galin L.A. Kontaktnye zadachi teorii uprugosti i vyazko-uprugosti [Contact Problems of Theory of Elasticity and Visco-elasticity]. Moscow, Nauka Publ., 1980, 296 p.
  11. Spravochnik Plaxis V. 8.2 [Plaxis V. 8.2 Reference Book]. Translated by Astaf’ev M.F. 2006, 182 p.
  12. Florin V.A. Osnovy mekhaniki gruntov [Fundamentals of Soil Mechanics]. Moscow, Stroyizdat Publ., 1959, vol. 2.
  13. Arutyunyan N.Kh., Kolmanovskiy V.B. Teoriya polzuchesti neodnorodnykh tel [Theory of Creep of Heterogeneous Bodies]. Moscow, Nauka Publ., 1983, 307 p.

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