INFLUENCE OF PIT WALL ANCHORAGE ONTO ADDITIONAL DEFORMATIONS OF EXISTING BUILDINGS

Vestnik MGSU 4/2012
  • Kubetskiy Valeriy Leonidovich - Scientific Research Institute of Moscow Construction (NII Mosstroi) Professor, Doctor of Technical Sciences, +7 (499) 739-30-43, Scientific Research Institute of Moscow Construction (NII Mosstroi), 8 Vinnitskaya St., Moscow, 119192, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Kaleev Denis Ivanovich - Scientific Research Institute of Moscow Construction (NII Mosstroi) engineer, Scientific Research Institute of Moscow Construction (NII Mosstroi), 8 Vinnitskaya St., Moscow, 119192, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 246 - 251

Anchored pit walls contribute to substantial improvement of the technological effectiveness of subterranean sections of buildings and to considerable reduction of their cost.
The issue of influence of anchorages onto supplementary deformations of adjacent buildings is to be resolved in the course of designing of deep anchored pits. In some cases, anchors can be installed immediately underneath the existing buildings.
Assessment of additional projected deformations of buildings located in close proximity to pits is exemplified by the specific structure of the pit support system that has active PIT [1] anchors. The authors also consider the influence produced by the structure of anchors onto the two buildings located within the area of influence of the excavation works and protected by the anchors installed underneath the foundations of the two adjacent buildings.

DOI: 10.22227/1997-0935.2012.4.246 - 251

References
  1. TR 50-180—06. Tekhnicheskie rekomendatsii po proektirovaniyu i ustroystvu svaynykh fundamentov, vypolnyaemykh s ispol'zovaniem razryadno-impul'snoy tekhnologii dlya zdaniy povyshennoy etazhnosti (svai-RIT) [TR 50-18-06. Technical Recommendations Regarding Design Development and Construction of Pile Foundations Made through the Application of the Electric Discharge Technology to High-Rise Buildings (RIT Piles)]. Moscow, VEK Publ., 2006, 68 p.
  2. Plaxis Software Version 8. Spravochnoe rukovodstvo [Reference Manual]. Moscow, 2006.
  3. GUP «NIIMosstroy». Zaklyuchenie po rezul'tatam geotekhnicheskoy ekspertizy proektnykh resheniy po ustroystvu ograzhdeniya kotlovana stroyashchegosya zhilogo doma s podzemnoy avtostoyankoy po adresu: g. Moskva, VAO, Izmaylovo, kvartal 26, 10-ya Parkovaya ul., vl. 20. [State Unitary Enterprise Scientific Research Institute of Moscow Construction “Opinion Based on Geotechnical Examination of Design Solutions for the Shoring of the Pit of the Future Residential House and the Subterranean Parking Lot at: Block 26, Izmaylovo, 20 10th Parkovaya St., Moscow, Eastern Administrative District”. Moscow, 2006.
  4. NIIOSP im. N.M. Gersevanova. Filial FGUP NITs «Stroitel'stvo». Nauchno-tekhnicheskiy otchet. Dopolnitel'noe obsledovanie tekhnicheskogo sostoyaniya zhilogo doma № 44 po ul. Verkhnyaya Pervomayskaya v g. Moskve, popadayushchego v zonu vliyaniya stroitel'stva zhilogo doma s podzemnoy avtostoyankoy po adresu: 10-ya Parkovaya ul., vl. 20 [Scientific and Research Institute of Beddings and Subterranean Structures named after N.M. Gersevanov. Branch of Federal State Unitary Enterprise “Construction Research Center”. Technological Research Report. Supplementary examination of the technical condition of Residential House № 4, Verkhnyaya Pervomayskaya st., Moscow, located within the area of influence of a new construction site of a residential house and a subterranean parking lot]. Moscow, 2007.

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Field tests and numerical experiments of composite reinforced concrete floor

Vestnik MGSU 11/2015
  • Zamaliev Farit Sakhapovich - Department of Metal Structures and Testing of Structures, Kazan State University of Architecture and Engineering (KSUAE) Candidate of Technical Sciences, Professor, Associate Professor, Department of Metal Structures and Testing of Structures, Kazan State University of Architecture and Engineering (KSUAE), 1 Zelenaya st., Kazan, 420043, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Morozov Vadim Andreevich - Kazan State University of Architecture and Engineering (KSUAE) Master, Department of Metal Constructions and Test of Structures, Kazan State University of Architecture and Engineering (KSUAE), 1 Zelenaya str., Kazan, 420043, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 58-67

In the recent years there appeared a tendency of widening the use of composite reinforced concrete structures in Russian construction practice, which keeps current the further investigations of their stress-strain state. In order to estimate the stress-strain state of composite reinforced concrete structures different methods are used: both analytical and experimental. In spite of material and labour costs field tests give the most correct indexes of the behavior of structures in actual operating conditions. The experimental investigations of composite reinforced concrete floors of civil buildings having considerable slenderness allow exploring new qualitative data of their stress-strain state. The authors offer the analysis of experimental investigations of composite reinforced concrete structures, in particular, composite reinforced concrete floor. They described geometrical and physical parameters of a test piece, the methods of measurements and tests, the experiment’s results are analyzed. The charts of flexure, stress blocks and distribution of moments are offered. The authors also give the results of numerical experiments and comparisons of stress-strain state of composite reinforced concrete floor with the results of field tests and their analysis.

DOI: 10.22227/1997-0935.2015.11.58-67

References
  1. Almazov V.O. Problemy ispol’zovaniya Evrokodov v Rossii [Problems of Using Eurocodes in Russia]. Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2012, no. 7, pp. 36—38. (In Russian)
  2. Eurocode 2: Design of Concrete Structures — Part 1: General Rules for Buildings. European Committee for Standardization, 2002, 226 p.
  3. Mirsayapov I.T., Zamaliev F.S., Shaymardanov R.I. Otsenka prochnosti normal’nykh secheniy stalezhelezobetonnykh izgibaemykh elementov pri odnokratnom kratkovremennom staticheskom nagruzhenii [Estimating the Stability of Normal Sections of Composite Reinforced Concrete Bending Elements at Single Short-Term Static Loading]. Vestnik Volzhskogo regional’nogo otdeleniya RAASN [Proceedings of Volga Regional Department of Russian Academy of Architecture and Construction Sciences]. 2002, no. 5, pp. 247—250. (In Russian)
  4. Salmon Ch.G. Handbook of Composite Construction Engineering. Part 2: Composite Steel-concrete Construction. New York, 1982, pp. 41—79.
  5. Mirsayapov I.T., Zamaliev F.S. Stalezhelezobetonnye izgibaemye konstruktsii dlya usloviy rekonstruktsii i otsenka ikh prochnosti [Composite Reinforced Concrete Bending Structures for the Conditions of Reconstruction and Estimation of their Stability]. Materialy II mezhregional’nogo nauchno-prakticheskogo seminara [Materials of the 2nd Interregional Science and Practice Seminar]. Cheboksary, 2001, pp. 67—70. (In Russian)
  6. Hendy C.R., Johnson R. Designers’ Guide to EN 1994-2 Eurocode 4: Design of Composite Steel and Concrete Structures. Part 2, General Rules and Rules for Bridges. Thomas Telford Ltd., 2006, 208 p.
  7. Almazov V.O. Garmonizatsiya stroitel’nykh norm: neobkhodimost’ i vozmozhnosti [Harmonization of Construction Norms: Necessity and Possibilities]. Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2007, no. 1, pp. 51—54. (In Russian)
  8. Pekin D.A. Plitnaya stalezhelezobetonnaya konstruktsiya [Slabby Composite Reinforced Concrete Structure]. Moscow, ASV Publ., 2010, 440 p. (In Russian)
  9. Naeda Y., Abe H. State of the Art on Steel-Concrete Composite Construction in Japan. Civil Engineering in Japan. Tokyo, 1983, vol. 22, pp. 29—45.
  10. Salmon Ch.G. Handbook of Composite Construction Engineering. Part 2: Composite Steel-Concrete Construction. New York, 1982, pp. 41—79.
  11. Bresler B. Reinforced Concrete Engineering. Vol. 1. Materials, Structural Elements, Safety. Copyright 1974, pr. 236—241.
  12. Pilkey W.D. Peterson’s Stress Construction Factors. 2nd ed. John Wileys and sons Inc, 2000, 508 p.
  13. Corley W.G., Hawkins N.M. Shearhead Reinforcement for Slabs. J. of the American Concrete Institute. 1968, vol. 65, no. 10, pp. 811—824. DOI: http://dx.doi.org/10/1/1968.
  14. Belkin A.E., Gavryushin S.S. Raschet plastin metodom konechnykh elementov [Calculation of Slabs Using Finite Element Method]. Moscow, MGTU im. N.E. Baumana Publ., 2008, 232 p. (In Russian)
  15. Zamaliev F.S., Shaymardanov R.I. Eksperimental’nye issledovaniya stalezhelezobetonnykh konstruktsii na krupnomasshtabnykh modelyakh [Experimental Investigations of Composite Reinforced Concrete Structures Using Large-Scale Models]. Izvestiya Kazanskogo gosudarstvennogo arkhitekturno-stroitel’nogo universiteta [Kazan State University of Architecture and Engineering News]. 2008, no. 2 (10), pp. 47—52. (In Russian)
  16. Zamaliev F.S. Eksperimental’nye issledovaniya prostranstvennoy raboty stalezhelezobetonnykh konstruktsiy [Experimental Research of Three-dimensional Performance of Composite Steel and Concrete Structures]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2012, no. 12, pp. 53—60. (In Russian)
  17. Zamaliev F.S. Chislennye eksperimenty v issledovaniyakh prostranstvennoy raboty stalezhelezobetonnykh perekrytiy [Numerical Experiments in Investigations of Space Operation of Composite Reinforced Concrete Slabs]. Izvestiya Kazanskogo gosudarstvennogo arkhitekturno-stroitel’nogo universiteta [Kazan State University of Architecture and Engineering News]. 2012, no. 4 (22), pp. 102—107. (In Russian)
  18. Gibshman E.E. Proektirovanie stal’nykh konstruktsiy, ob”edinennykh s zhelezobetonom, v avtodorozhnykh mostakh [Design of Steel Structures Combined with Reinforced Concrete in Railway Bridges]. Moscow, Avtotransizdat Publ., 1956, 231 p. (In Russian)
  19. Gibshman M.E. Raschet kombinirovannykh konstruktsiy mostov s uchetom usadki i sil iskusstvennogo regulirovaniya [Calculation of Combined Structures of Bridges with Account for Shrinkage and Forces of Artificial Control]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 1963, no. 2, pp. 31—34. (In Russian)
  20. Streletskiy N.N. Stalezhelezobetonnye proletnye stroeniya mostov [Composite Reinforced Concrete Bridge Frameworks]. 2-nd edition, enlarged. Moscow, Transport Publ., 1981, 360 p. (In Russian)

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The influence of the scale effect and high temperatures on the strength and strains of high performance concrete

Vestnik MGSU 3/2014
  • Korsun Vladimyr Ivanovych - Donbas National Academy of Civil Engineering and Architecture (DonNASA) Doctor of Technical Sciences, Professor, Head, Department of Reinforced Concrete Structures, Donbas National Academy of Civil Engineering and Architecture (DonNASA), 2 Derzhavin str., Makeyevka, Donetsk region, Ukraine, 86123; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Korsun Artem Vladimirovych - Donbas National Academy of Civil Engineering and Architecture (DonNASA) Candidate of Technical Sciences, Associate Professor, Department of Reinforced Concrete Structures, Donbas National Academy of Civil Engineering and Architecture (DonNASA), 2 Derzhavin str., Makeyevka, Donetsk region, Ukraine, 86123; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 179-188

The most effective way to reduce the structure mass, labor input and expenses for its construction is to use modern high-performance concrete of the classes С50/60… С90/105, which possess high physical and mathematic characteristics. One of the constraints for their implementation in mass construction in Ukraine is that in design standards there are no experimental data on the physical and mathematic properties of concrete of the classes more than С50/60. Also there are no exact statements on calculating reinforced concrete structures made of high-performance concretes.The authors present the results of experimental research of the scale effect and short-term and long-term heating up to +200 ° C influence on temperature and shrinkage strain, on strength and strain characteristics under compression and tensioning of high-strength modified concrete of class C70/85. The application of high performance concretes is challenging in the process of constructing buildings aimed at operating in high technological temperatures: smoke pipes, coolers, basins, nuclear power plants' protective shells, etc. Reducing cross-sections can lead to reducing temperature drops and thermal stresses in the structures.

DOI: 10.22227/1997-0935.2014.3.179-188

References
  1. Korsun A.V. Osobennosti deformirovaniya i razrusheniya vysokoprochnykh modifitsirovannykh betonov v usloviyakh nagreva do +200 ?Ñ [Features of Deformation and Destruction of High Performance Modifi ed Concretes in Case of Heating up to +200 °Ñ]. Vestnik DonNASA [Proceedings of Donbas National Academy of Civil Engineering and Architecture]. 2007, no. 1(63), pp. 116—121.
  2. Korsun V.I. Napryazhenno-deformirovannoe sostoyanie zhelezobetonnykh konstruktsiy v usloviyakh temperaturnykh vozdeystviy [Stress and Strain State of Reinforced Concrete Structures under Thermal Impacts]. Makeevka, DonGASA Publ., 2003, 153 p.
  3. GOST 24452—80. Betony. Metody opredeleniya prizmennoy prochnosti, modulya uprugosti i koeffitsienta Puassona [Russian State Standard 24452—80. Concretes. Methods of Defining Prism Strength, Elastic Module and Poisson's ratio]. Moscow, Izdatel'stvo standartov Publ., 1980.
  4. CEN: Eurocode 2 (2004). Design of Concrete Structures: Part 1-1 General Rules and Rules for Buildings, EN 1992-1-1: 2004.
  5. Korsun V.I., Kalmykov Yu.Yu. Neodnorodnost' prochnostnykh i deformatsionnykh svoystv betona po ob"emu massivnykh elementov konstruktsiy [Heterogeneity of Strength and Strain Properties of Concrete According to the Size of Massive Construction Elements]. Sovremennye problemy stroitel'stva [Current Problems in Construction]. Donetsk, Donetskiy PromstroyNIIproekt, OOO «Lebed'» Publ. 2002, vol. 2, pp. 95—102.

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CONSTRUCTION OF A DIAGRAM DESCRIBING DEFORMATION OF THE CONCRETE EXPOSED TO A SINGLE DYNAMIC FORCE WITH ACCOUNT OF PRESTRESSES PRODUCED BY THE STATIC LOAD

Vestnik MGSU 7/2012
  • Tsvetkov Konstantin Aleksandrovich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Associate Professor, Department of Strength of Materials; +7 (499) 183-43-29, 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 .
  • Bazhenova Aleksandra Vladimirovna - Moscow State University of Civil Engineering (MSUCE) master student, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • 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.

Pages 152 - 158

The authors describe methods of composing a concrete dynamic deformation diagramme, if the pre-stress produced by the static load is taken into account. It is noteworthy that the available data concerning the influence of the load preceding any dynamic load and produced on the mechanical properties of the concrete are limited and discrepant. The authors propose their methodology of an experiment and describe items of specialized equipment employed to hold the experiment in question. The authors have held an experimental study to reproduce the conditions of a real structure exposed to an emergency dynamic load. Samples to be tested are exposed to the static load of varied intensity without any relief. Duration of the load application will be six months. The diagram should be recommended for reference in the course of design of concrete and reinforced concrete structures exposed to dynamic loads applied in emergency situations.

DOI: 10.22227/1997-0935.2012.7.152 - 158

References
  1. Bazhenov Yu.M. Beton pri dinamicheskom nagruzhenii [Concrete Exposed to Dynamic Loading]. Moscow, Stroyizdat Publ., 1970, 272 p.
  2. Prokopovich I.E., Kobrinets V.M., Polovets V.I., Tvardovskiy I.A. Vliyanie rezhima prilozheniya szhimayushchey nagruzki na dlitel’noe soprotivlenie betona [Influence of the Compression Load Pattern on the Long-term Concrete Strength]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 1991, no. 6, pp. 6—8.
  3. Brodskiy V.V. Soprotivlenie dinamicheskim impul’snym vozdeystviyam predvaritel’no napryazhennykh betonnykh elementov i zhelezobetonnykh kolonn [Resistance of Pre-stressed Concrete Elements and Reinforced Concrete Columns to Dynamic Pulse Forces]. Rostov-Don, 2001, 23 p.
  4. Kirillov A.P. Prochnost’ betona pri dinamicheskikh nagruzkakh [Concrete Strength If Exposed to Dynamic Loads]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 1987, no. 2, pp. 38—39.
  5. Tsvetkov K.A. Vliyanie dinamicheskogo nagruzheniya na prochnostnye i deformativnye svoystva betona pri odnoosnykh i dvuosnykh napryazhennykh sostoyaniyakh [Dynamic Loading Influence on Concrete Strength and Deformation-related Properties in the Event of Mono-axial and Bi-axial Stress States]. Moscow, MSUCE, 2007.
  6. Tsvetkov K.A. Osnovnye rezul’taty eksperimental’no-teoreticheskikh issledovaniy prochnostnykh i deformativnykh svoystv betona pri dinamicheskom nagruzhenii v usloviyakh odnoosnogo i dvukhosnogo szhatiya [Key Results of Experimental and Theoretical Researches of the Concrete Strength and Deformation-related Properties under Dynamic Loading in the Event of Mono-axial and Biaxial Compression]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2007, no. 3, pp. 109—120.
  7. Malashkin Yu.N., Bezgodov I.M., Tsvetkov K.A. Metodicheskie osobennosti issledovaniya deformativno-prochnostnykh kharakteristik betona pri dinamicheskom nagruzhenii v usloviyakh slozhnykh napryazhennykh sostoyaniy [Methodological Features of Research of Concrete Deformation and Strength-related Properties under Dynamic Loading in Complex Stress States]. Estestvennye i tekhnicheskie nauki [Natural and Technical Sciences], 2007, no. 1, pp. 182—190.
  8. Tsvetkov K.A. Vliyanie dinamicheskogo nagruzheniya na prochnost’ i deformativnye kharakteristiki betona pri odnoosnom rastyazhenii i napryazhennom sostoyanii “szhatie-rastyazhenie” [Dynamic Loading Influence on Concrete Durability and Deformation-related Properties under Mono-axial Strain and in the “Stress-Strain” State]. Estestvennye i tekhnicheskie nauki [Natural and Technical Sciences]. 2007, no. 4, pp. 294—298.

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EXPERIMENTAL FIELD investigations OF DEFORMABILITY of claystones and sandstones

Vestnik MGSU 6/2018 Volume 13
  • Ponomarev Andrey Budimirovicn - Perm National Research Polytechnic University (PNRPU) Doctor of Technical Sciences, Professor, Head of the Department of Construction Technology and Geotechnics, Perm National Research Polytechnic University (PNRPU), 29 Komsomolsky prospekt, Perm, 614990, Russian Federation.
  • Sychkina Evgeniya Nikolaevna - Perm National Research Polytechnic University (PNRPU) Candidate of Technical Sciences, Associate Professor, Department of the Construction Technology and Geotechnics, Perm National Research Polytechnic University (PNRPU), 29 Komsomolsky prospekt, Perm, 614990, Russian Federation.

Pages 756-767

Subject: the “load”-“deformation” dependence and phases of the stress-strain state of claystones and sandstones. Research objectives: perform stamp and pressuremeter tests, analyze results of field tests and create recommendations for the design and calculation of foundations on claystones and sandstones. Materials and methods: in this article the field methods of testing of claystones and sandstones are considered. Stamp and pressuremeter tests were performed, the “load - settlement” dependence was obtained and phases of the stress-state for claystone and sandstone were identified. The design strength of the soil for the drill pile buried in claystones and sandstones by more than 0.5 m was determined. Results of field tests are processed by mathematical statistics methods in accordance with GOST 20522-2012. The obtained results are analyzed and compared with the previous results of tests on foundations. Results: the scientific novelty of this work consists in revealing the regularities in the formation of the stress-strain state in claystones and sandstones under the action of the load in various directions. The deformation mode and development of phases of the stress-strain state in claystones and sandstones differ significantly from modern clays and sands. In 58 % of the stamp tests, the loss of the bearing capacity of the base, composed of claystones and sandstones, was observed only after reaching the load of 3.0 MPa. In 19 % of the stamp tests, the deformations sharply increased already at the load level of 0.6…2.2 MPa, which is characteristic of less stable varieties of claystones and sandstones. In 23 % of the experiments, the vertical deformations of sandstones and claystones had a linear character for the entire “load”-“settlement” graph and the phase of soil bearing capacity loss was not achieved. A similar picture was observed when performing pressuremeter tests: the phase of bearing capacity loss was not achieved for claystones at a maximum horizontal pressure of 0.85 MPa and for sandstones - at a maximum horizontal pressure of 1.0 MPa, and the deformations of the soil were predominantly linear, which is typical for compaction phase and phase of local shears. Conclusions: claystones and sandstones have high values of design strength and can be a reliable low-compressible base for buildings and constructions with loads from 0.2 to 0.3 MPa. Calculations can be made using the theory of a linearly deformed soil when designing the foundations of buildings and constructions on claystones and sandstones. However, it should be taken into account that this observation is valid for one-time loading, since claystones and sandstones have residual deformations associated with the destruction of cementation bonds between soil particles. It is rational to use in calculations of foundations on claystones and sandstones the values of the strength parameters of the soil obtained in laboratory or field tests with soaking, taking into account the possible deterioration of the properties of these soils.

DOI: 10.22227/1997-0935.2018.6.756-767

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