MODELING OF LOCAL BUCKLING OF PERFORATED BEAMS WITH CIRCULAR OPENINGS: COMPUTATION BY FEM AND EXPERIMENTS ON TIN-PLATE STRUCTURES

Vestnik MGSU 10/2017 Volume 12
  • Lavrova Anna Sergeevna - Kaliningrad Marine Design Institute - branch of AO "31st State Design Institute of Special Construction" engineer, Kaliningrad Marine Design Institute - branch of AO "31st State Design Institute of Special Construction", 15 Artilleriyskaya str., Kaliningrad, 236015, Russian Federation.
  • Pritykin Aleksey Igorevich - Kaliningrad State Technical University (KGTU) Doctor of Technical Sciences, Professor, Department of Shipbuilding, Kaliningrad State Technical University (KGTU), 1 Sovetskiy prospect, Kaliningrad, 236040, Russian Federation.

Pages 1115-1124

Subject: investigation of local stability of cellular beams with circular openings, which are widely used in civil engineering. The main problem in this field is the absence of analytical relations for evaluation of critical load of perforated beams. Research objectives: show effectiveness of studying the local stability of perforated beams on small-scale models made of tin; obtain a relationship for recalculating the results of the model tests onto the full-scale structure; check the reliability of numerical calculations of the critical load by the finite element method (FEM). Materials and methods: tests were performed on the tin models of small beams of 32 cm length and on the full-scale steel structure of 4 m length. As for research methods, we used similarity theory, experiments and numerical modeling of stability by the finite element method with help of the software package ANSYS. Results: it was shown that the tests of small-scale models give reliable results for estimation of critical load for full-scale structures that experience local buckling in elastic stage of loading. Obtained relationship for recalculation of critical load of the model onto the full-scale structure does not require strict observance of similarity with respect to Poisson’s ratio and size of flanges because their influence on the critical load is small. Comparison of data obtained from the model tests with the results of structure analysis by the finite element method showed that FEM calculations give reliable results for prediction of stability, and the testing of models is needed only for examining the effect of initial imperfections in the form of small buckles, inaccuracy of manufacture or variation in thicknesses, or the influence of residual stresses due to welding. Discrepancy between the results of tests of the models and numerical calculations of the critical load by FEM does not exceed 6 %. Conclusions: the relationship obtained on the basis of similarity theory allows us to efficiently recalculate the critical load of the model onto the full-scale structure, for which only similarity of geometry of the perforated web from the side view, identity of boundary conditions and the loading type should be respected. Critical load of the cellular beam is proportional to the cube of the web thickness.

DOI: 10.22227/1997-0935.2017.10.1115-1124

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Experimental and theoretical studies into the stress-strain state of the purlin supported by sandwich panels

Vestnik MGSU 11/2014
  • Danilov Aleksandr Ivanovich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Associate Professor, Department of Metal Structures, 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 .
  • Tusnina Ol’ga Aleksandrovna - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Metal Structures, 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 26-36

In the article, the co-authors analyze the findings of the experimental and theoretical studies into the real behaviour of a thin-walled cold-formed purlin as part of the roof structure made of sandwich panels. The roof structure fragment was tested; displacements and stresses, that the purlin was exposed to, were identified in respect of each loading increment. NASTRAN software was employed to perform the numerical analysis of the roof structure, pre-exposed to experimental tests, in the geometrically and physically non-linear setting. The finite element model, generated as a result (the numerical analysis pattern), is sufficiently well-set, given the proposed grid of elements, and it ensures reasonably trustworthy results. The diagrams describing the stress/displacement to the load ratio and obtained numerically are consistent with those generated experimentally. The gap between the critical loading values reaches 4%. Analytical and experimental findings demonstrate their close conformity, and this fact may justify the application of the numerical model, generated within the framework of this research project, in the course of any further research actions. The co-authors have identified that the exhaustion of the bearing capacity occurs due to the loss of the buckling resistance as a result of the lateral torsional buckling.

DOI: 10.22227/1997-0935.2014.11.26-36

References
  1. Georgescu M. Distortional Behavior of Z Purlins Continuously Connected to Sandwich Panel Roofs. Proceedings of International Conference “Steel — a New and Traditional Material For Building”. Brasov, 2006, 143—148 p.
  2. Joo A.L. Analysis and Design of Cold-Formed Thin-Walled Roof Systems. PhD Dissertation, Budapest, 2009, 107 p.
  3. Ayrumyan E.L. Osobennosti rascheta stal’nykh konstruktsiy iz tonkostennykh gnutykh profiley [Features of Calculating Steel Structures of Thin-Walled Formed Sections]. Montazhnye i spetsial’nye raboty v stroitel’stve [Erection and Special Works in Construction]. 2008, no. 3, pp. 2—7. (In Russian).
  4. Ayrumyan E.L. Rekomendatsii po raschetu stal’nykh konstruktsiy iz tonkostennykh gnutykh profiley [Recommendations on Calculating Steel Structures of Thin-Walled Formed Sections]. StroyPROFIl’ [Construction Profile]. 2009, no. 8 (78), pp. 12—14. (In Russian).
  5. Ayrumyan E.L., Galstyan V.G. Issledovanie deystvitel’noy raboty tonkostennykh kholodnognutykh progonov iz otsinkovannoy stali [Investigation of the Actual Work of Thin-Walled Cold-Formed Beams of Galvanised Steel]. Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2002, no. 6, pp. 31—34. (In Russian).
  6. Luza G., Robra J. Design of Z-purlins: Part 1. Basics and Cross-section Values According to EN 1993-1-3. Proceedings of the 5th European Conference on Steel and Composite Structures EUROSTEEL. Graz, Austria, 2008, vol. A, pp. 129—134.
  7. Luza G., Robra J. Design of Z-purlins: Part 2. Design Methods Given in Eurocode EN 1993-1-3. Proceedings of the 5th European Conference on Steel and Composite Structures EUROSTEEL. Graz, Austria, 2008, vol. A, pp. 135—140.
  8. EN 1993-1-1:2009 Eurocode 3: Design of Steel Structures — Part 1-1: General Rules and Rules for Buildings. Available at: http://www.eurocodes.fi/1993/1993-1-1/SFS-EN1993-1-1-AC.pdf/. Date of access: 27.07.2014.
  9. Gardner L., Neterkot D.A. Rukovodstvo dlya proektirovshchikov k evrokodu 3: proektirovanie stal’nykh konstruktsiy EN 1993-1-1,1993-1-3, 1993-1-8 [Guidance for Designers to Eurocode 3: Design of Steel Structures EN 1993-1-1,1993-1-3, 1993-1-8]. Moscow, MISIMGSU Publ., 2013, 224 p. (In Russian).
  10. Young-Lin P., Put B.M., Trahair N.S. Lateral Buckling Strength of Cold-Formed Steel Z-Section Beams. Thin-Walled Structures. 1999, vol. 34, no. 1, pp. 65—93.
  11. Chu X., Rickard J., Li L. Influence of Lateral Restraint on Lateral-torsional Buckling of Cold-formed Steel Purlins. Thin-Walled Structures. 2005, vol. 43, no. 5, pp. 800—810. DOI: http://dx.doi.org/10.1016/j.tws.2004.10.012.
  12. Chu X., Ye Z., Kettle R., Li L. Buckling Behavior of Cold-formed Channel Sections under Uniformly Distributed Loads. Thin-Walled Structures. 2005, vol. 43, no. 4, pp. 531—542. DOI: http://dx.doi.org/10.1016/j.tws.2004.10.002.
  13. Duerr M., Misiek T., Saal H. The Torsional Restraint of Sandwich-panels to Resist the Lateral Torsional Buckling of Beams. Steel Construction. 2011, vol. 4, no. 4, pp. 251—258. DOI: http://dx.doi.org/10.1002/stco.201110033.
  14. Li L.Y. Lateral-torsional Buckling of Cold-formed Zed-purlins Partial-laterally Restrained by Metal Sheeting. Thin-Walled Structures. 2004, vol. 42, no. 7, pp. 995—1011.
  15. Seek M.W., Murray T.M. Mechanics of Lateral Brace Forces in Z-purlin Roof Systems. Conference Proceedings, Structural Stability Research Council Annual Stability Research Council. Rolla, Missouri, 2005, pp. 56—76.
  16. Albermani F.G.A., Kitipornchai S. Cold-formed purlin-sheeting systems. Proceedings of the Third International Conference on Advances in Steel Structures. Hong Kong, China, 2002, pp. 429—435.
  17. Lucas R.M., Albermani F.G.A., Kitiporchai S. Modelling of Cold-Formed Purlin-Sheeting Systems — Part 1: Full Model. Thin-Walled Structures. 1997, vol. 27, no. 4, pp. 223—243. DOI: http://dx.doi.org/10.1016/S0263-8231(96)00038-9.
  18. Rzeszut K., Czajkowski A. Laterally Braced Thin-walled Purlins in Stability Problems. Proceedings of the Conference Computer Methods in Mechanics. 2011. Available at: http://www.cmm.il.pw.edu.pl/cd/pdf/202.pdf/. Date of access: 27.07.2014.
  19. Vrany T., Braham M., Belica A. Restraint of Purlins for Various Roof Systems. 11th Nordic Steel Construction Conference NSCC. 2009, pp. 422—429.
  20. Kujawa M., Werochowski W., Urba?ska-Galewska E. Restraining of the Cold-formed Z-purlins with Sandwich Panels. Final Report. Gdansk, Poland, 2008, 126 p.
  21. Shimkovich D.G. Raschet konstruktsiy v MSC/NASTRAN for Windows [Calculation of Structures in MSC/NASTRAN for Windows]. Moscow, DMK Press, 2001, 448 p. (In Russian).

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Influence of location and parameters of stiffeners on the stability of a square plate under shear

Vestnik MGSU 12/2014
  • Pritykin Aleksey Igorevich - Immanuel Kant Baltic Federal University (IKBFU) Doctor of Technical Sciences, Associate Professor, Department of Urban Development, Land Planning and Design, Immanuel Kant Baltic Federal University (IKBFU), 14 Aleksandra Nevskogo str., Kaliningrad, 236041; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Kirillov Il’ya Evgen’evich - Kaliningrad State Technical University (KSTU) postgraduate student, Department of Industrial and Civil Engineering, Kaliningrad State Technical University (KSTU), 1 Sovetskiy Prospect, Kaliningrad, 236022, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 77-87

Application of flexible-walled beams is rather effective because the reducing of wall thickness compared to ordinary welded beams leads to substantial reduction of metal expenditure for the walls and its more rational use. The operation experience of such beams shows that the loss of local stability of a wall takes place near bearing cross section with characteristic diagonal type of half waves, indicating, that the reason for the stability loss is in shear deformation. In plate girder with slender web big transverse forces appear, which leads to its buckling as a result of shear. One of the ways to increase stability of the parts of web near supports is to install stiffeners. In the given work the task of finding critical stresses of fixed square plate with installed inclined stiffener is considered. Investigations were performed with the help of finite element method and were experimentally checked. Recommendations were given on the choice of optimal size of the stiffener.

DOI: 10.22227/1997-0935.2014.12.77-87

References
  1. Chen W.F., Lui E.M. Handbook of Structural Engineering, 2nd ed. CRC Press, 2005, 1768 p.
  2. Duggal S.K. Design of Steel Structures. Tata McGraw-Hill Education, 2000, 663 p.
  3. Darko Beg. Plate and Box Girder Stiffener Design in View of Eurocode 3: Part 1.5. 6th National Conference on Metal Structures. 2008, vol. 1, pp. 286—303.
  4. Hendy C.R., Presta F. Transverse Web Stiffeners and Shear Moment Interaction for Steel Plate Girder Bridges. Proceedings of the 7th International Symposium on Steel Bridges. Guimaracs. Portugal. 2008. ECCS, p. 8.
  5. Evans H.R. Longitudinally and Transversely Reinforced Plate Girders. Chapter 1. Plated Structures, Stability&Strength. Ed R. Narayanan. Elsevier Applied Science Publishers, London, 1983, pp. 1—73.
  6. Ravi S. Bellur. Optimal Design of Stiffened Plates. M. Sc. Thesis, University of Toronto, Graduate Department of Aerospace Science and Engineering, 1999, 100 p.
  7. Mohammed M. Hasan. Optimum Design of Stiffened Square Plates for Longitudinal and Square Ribs. Al-khwarizmi Engineering Journal. 2007, vol. 3, no. 3, pp. 13—30.
  8. Leitch S.D. Steel Plate Girder Webs with Slender Intermediate Transverse Stiffeners. Ottawa: National Library of Canada. Biblioth? que national edu Canada, 1999.
  9. Virag Z. Optimum Design of Stiffened Plates for Different Load and Shapes of Ribs. Journal of Computational and Applied Mechanics. 2004, vol. 5, no. 1, pp. 165—179.
  10. Kubiak T. Static and Dynamic Buckling of Thin-Walled Plate Structures. Cham, Springer, 2013, 250 p. DOI: http://dx.doi.org/10.1007/978-3-319-00654-3.
  11. ?kesson B. Plate Buckling in Bridges and Other Structures. London, Taylor & Francis, 2007, 282 p.
  12. Gaby Issa-El-Khoury, Daniel G Linzell, Louis F. Geschwindner. Computational Studies of Horizontally Curved, Longitudinally Stiffened, Plate Girder Webs in Flexure. Journal of Constructional Steel Research. February 2014, vol. 93, pp. 97—106. DOI: http://dx.doi.org/10.1016/j.jcsr.2013.10.018.
  13. Aleksi? S., Roga? M., Lu?i? D. Analysis of Locally Loaded Steel Plate Girders: Model for Patch Load Resistance. Journal of Constructional Steel Research. October 2013, vol. 89, pp. 153—164. DOI: http://dx.doi.org/10.1016/j.jcsr.2013.07.005.
  14. Saliba N., Real E., Gardner L. Shear Design Recommendations for Stainless Steel Plate Girders. Engineering Structures. February 2014, vol. 59, pp. 220—228. DOI: http://dx.doi.org/10.1016/j.engstruct.2013.10.016.
  15. Real E., Mirambell E., Estrada I. Shear Response of Stainless Steel Plate Girders. Engineering Structures. July 2007, vol. 29, no. 7, pp. 1626—1640. DOI: http://dx.doi.org/10.1016/j.engstruct.2006.08.023.
  16. Chac?n R., Mirambell E., Real E. Transversally stiffened plate girders subjected to patch loading. Part 1. Preliminary study. Journal of Constructional Steel Research. January 2013, vol. 80, pp. 483—491. : http://dx.doi.org/10.1016/j.jcsr.2012.06.008.
  17. Tang K.H., Evans H.R. Transverse Stiffeners for Plate Girder Webs—an Experimental Study. Journal of Constructional Steel Research. 1984, vol. 4, no. 4, pp. 253—280. DOI: http://dx.doi.org/10.1016/0143-974X(84)90002-6.
  18. Birger I.A., Panovko Ya.G., editors. Prochnost’, ustoychivost’, kolebaniya. Spravochnik v trekh tomakh [Strength, Stability, Fluctuations. Reference Book]. Vol. 3, Moscow, Mashinostroenie Publ., 1968, 567 p. (In Russian)
  19. SP 16.13330.2011. Stal’nye konstruktsii. Aktualizirovannaya redaktsiya SNiP II-23—81* [Construction Requirements SP 16.13330.2011. Steel Structures. Revised edition of SN&R II-23—81*]. Minregion Rossii [Ministry of Regional Development of Russia]. Moscow, OAO «TsPP» Publ., 2011, 172 p. (In Russian)
  20. Pritykin A.I. Mestnaya ustoychivost’ balok-stenok s shestiugol’nymi vyrezami [Local Stability of Wall Beams with Hexagonal Gains]. Stroitel’naya mekhanika i raschet sooruzheniy [Structural Mechanics and Calculation of Structures]. 2011, no. 1, pp. 2—6. (In Russian)

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INFLUENCE OF STRUCTURAL PECULIARITIES OF INTEGRATED RIBBED WOODEN SLABS ON THEIR STRESS-STRAIN BEHAVIOUR

Vestnik MGSU 5/2013
  • Zhadanov Viktor Ivanovich - Orenburg State University (OGU) Doctor of Technical Sciences, Associate Professor, Department of Structural Units; +7 (83532) 91- 21-23, +7 (83532) 27-11-42, Orenburg State University (OGU), 13 Pobedy pr., Orenburg, 460018, Russian Federation.
  • Tisevich Evgeniy Valer’evich - Orenburg State University (OGU) Candidate of Technical Sciences, Lecturer, Department of Structural Units; +7 (83532) 91-21-23, Orenburg State University (OGU), 13 Pobedy pr., Orenburg, 460018, Russian Federation.
  • Ukrainchenko Dmitriy Aleksandrovich - Orenburg State University (OGU) Candidate of Technical Sciences, Senior Lecturer, Department of Structural Units; +7 (83532) 27-93-72, Orenburg State University (OGU), 13 Pobedy pr., Orenburg, 460018, Russian Federation.

Pages 35-42

In the article the authors provide their assessments and recommendations concerning the influence produced by the structural parameters onto the stress-strain behaviour of slabs having a wooden frame, if the veneering is integrated into the structural behaviour. The authors have completed a research into the pattern of distribution of regular compressive stresses over the width of the veneering surface. The authors have identified the values of reduction factors to be used to analyze integrated structures on the basis of simplified slab design and analysis patterns.The degree of heterogeneity of distribution of regular stresses over the width of the veneering is mainly driven by the rib-to-rib distance and the thickness of the veneering.Any unbiased assessment of the operational reliability of integrated wooden slabs requires development of specialized recommendations concerning their strength and rigidity analysis with account for the real parameters of structures adopted at the stage of their design.The research project was implemented by the authors with the support of the RF Ministry of Education and Science pursuant to Agreement 14.U02.21.0129.

DOI: 10.22227/1997-0935.2013.5.35-42

References
  1. Dmitriev P.A., Zhadanov V.I. Bol’sherazmernye sovmeshchennye plity iz kleenoy drevesiny [Big-sized Integrated Slabs Made of Laminated Wood]. Orenburg, IPK GOU OGU Publ., 2007, 209 p.
  2. Endzhievsky L.V., Inzhutov I.S., Dmitriev P.P. Wooden Spatial Structures in Suberia. Spatial Structures in New and Renovation Projects of Buildings and Constructions: Theory, Investigations, Design, Erection. Proceedings of International Congress ICSS-98. June 22—26, 1998, Moscow, pp. 581—588.
  3. Dutko R. V?skum stanovenia spolup?sobiacej ?irky preglejkov?ch dosov?ch p?sov rebrov?ch panelov. Zbornik II. Celopolskeho symposia «V?skum uplatnenia dreva a materialov na b?ze dreva v stavebn?ch kon?trukci?ch». Politechnika ?tetinska, ?tetin, 1983, pp. 21—28.
  4. Grebenyuk G.I., Yan’kov E.V. Optimizatsiya parametrov bol’sherazmernykh rebristykh plit na osnove drevesiny [Optimization of Parameters of Big-sized Ribbed Slabs Made of Wood]. Problemy optimal’nogo proektirovaniya sooruzheniy [Problems of Optimal Design of Structures]. Sb. dokl. V-go Vseross. Seminara [Collected Reports of the 5th All-Russian Seminar]. Novosibirsk, NGASU (Sibstrin) Publ., 2005, pp. 110—119.
  5. Zhadanov V.I., Ukrainchenko D.A. Derevyannye panel’nye konstruktsii dlya seysmostoykogo maloetazhnogo stroitel’stva [Wood Panel Structures for Seismic Low-rise Construction]. Sovremennye stroitel’nye konstruktsii iz metalla i drevesiny [Modern Metal and Wooden Structures]. Odessa, OOO «Vneshreklamservis» Publ., 2011, No. 15, pp. 97—101.
  6. Zhadanov V.I., Tisevich E.V., Ukrainchenko D.A. Proektirovanie i raschet novykh konstruktivnykh form panel’nykh konstruktsiy na derevyannom karkase [Design and Analysis of New Constructions of Panel Structures Having Wooden Frames]. Orenburg, IPK GOU OGU Publ., 2011, 218 p.
  7. SP 64.13330.2011. Derevyannye konstruktsii [Construction Regulations 64.13330.2011. Wooden Structures]. Moscow, OAO «TsPP» Publ., 2011, 141 p.
  8. Inzhutov I.S., Deordiev S.V. Konstruktsiya i rezul’taty ispytaniy trekhugol’noy derevometallicheskoy blok-fermy [Structure and Testing Results Demonstrated by Three-angled Wood and Metal Frames]. Izvestiya vuzov. Stroitel’stvo. [News of Higher Education Institutions. Construction.] 1998, no. 10, pp. 129—134.
  9. Endzhievskiy L.V., Inzhutov I.S., Dmitriev P.A. Kombinirovannye iz stali, betona, dereva prostranstvennye konstruktsii blochnogo tipa [Composite Modular Spatial Structures Made of Steel, Concrete, Wood]. Krasnoyarsk, SFU Publ., IPK OGU Publ., 2008, 331 p.
  10. Kirilenko V.F., Lin’kov I.M. K voprosu eksperimental’nogo opredeleniya koeffitsienta privedennoy shiriny obshivki trekhsloynykh rebristykh paneley [Experimental Identification of Coefficient of Adjusted Width of Veneering for Three-layered Ribbed Panels]. Izvestiya vuzov. Stroitel’stvo i arkhitektura. [News of Higher Education Institutions. Construction and Architecture.] 1982, no. 6, pp. 127—129.

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MODELLING OF A METAL RIBBED CYLINDRICAL PANEL

Vestnik MGSU 2/2012
  • Raschepkina Svetlana Alekseevna - Balakovo Institute of Technique, Technology and Management, Affiliate of Saratov State Technical University Candidate of Technical Sciences, Senior Lecturer, Deputy Head of Department of Industrial and Civil Engineering 8 (453) 44-47-90, Balakovo Institute of Technique, Technology and Management, Affiliate of Saratov State Technical University, 140 Chapaeva St., Saratov Region, Balakovo; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Bojchuk Sergej Vasil'evich - Balakovo Institute of Technique, Technology and Management, Affiliate of Saratov State Technical University Assistant Lecturer 8 (453) 44-47-90, Balakovo Institute of Technique, Technology and Management, Affiliate of Saratov State Technical University, 140 Chapaeva St., Saratov Region, Balakovo.

Pages 84 - 90

The results of research of a newly developed metal cylindrical panel in the course of its shaping, and procedure of verification of the computer model are presented in the paper. The computer model of the panel under consideration, developed through selection of the finite element as a result of reshaping designated to ensure the formation of a plastic hinge in the points of junction between the principal element (the plate) and the stripes, makes it possible to perform a sufficiently accurate analysis of experimental and theoretical data of structures of ribbed panels under consideration.
Application of the finite elements method in the course of development of computer models for the purpose of research of the process of shaping of ribbed panels at each stage of pumping of compressed air into the panel, makes it possible to assess the alteration of the stress-strained state of the structure and to identify the parameters of the new cylindrical ribbed panel with a high degree of accuracy, including such parameters as the radius of curvature , swell ratio , and compression ratio .

DOI: 10.22227/1997-0935.2012.2.84 - 90

References
  1. Raschepkina S.A. Metallicheskie emkosti iz legkih konstrukcij povyshennoj transportabel'nosti [Metal Tanks Made of Lightweight Structures of Enhanced Transportability]. Saratov, SGTU, 2007, 288 p.
  2. Raschepkina S.A., Bojchuk S.V. Jeksperimental'nye issledovanija metallicheskih panelej s polymi rebrami [Experimental Research of Metal Panels with Hollow Ribs]. International Scientific and Technical Conference “Jeffektivnye Stroitel'nye Konstrukcii: Teorija i Praktika” [Effective Building Structures: Theory and Practice], collection of papers, Penza University of Architecture and Civil Engineering, 2008. pp. 49—52.
  3. Gorodeckij A.S., Evzerov I.D. Komp'juternye modeli konstrukcij [Computer Models of Structures], Moscow, ASV, 2009. 360 p.
  4. Raschepkina S.A. Novye prostranstvennye rebristye metallicheskie konstrukcii zdanij i sooruzhenij [New Three-dimensional Metal Ribbed Structures of Buildings and Facilities], Promyshlennoe i grazhdanskoe stroitel'stvo [Industrial and Civil Engineering], 2009, Issue # 7, pp. 48—50.

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THE STRENGTH OF REINFORCED CONCRETE BEAM ELEMENTS UNDER CYCLIC ALTERNATING LOADING AND LOW CYCLE LOAD OF CONSTANT SIGN

Vestnik MGSU 9/2015
  • Semina Yuliya Anatol'evna - Odessa State Academy of Civil Engineering and Architecture (OGASA) postgraduate student, Department of Strength of Materials, Odessa State Academy of Civil Engineering and Architecture (OGASA), 4 Didrikhsona Str., Odessa, 65045, Ukraine; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 36-50

The behavior of reinforced concrete elements under some types of cyclic loads is described in the paper. The main aim of the investigations is research of the stress-strain state and strength of the inclined sections of reinforced concrete beam elements in conditions of systemic impact of constructive factors and the factor of external influence. To spotlight the problem of cyclic loadings three series of tests were conducted by the author. Firstly, the analysis of the tests showed that especially cyclic alternating loading reduces the bearing capacity of reinforced concrete beams and their crack resistance by 20 % due to the fatigue of concrete and reinforcement. Thus the change of load sign creates serious changes of stress-strain state of reinforced concrete beam elements. Low cycle loads of constant sign effect the behavior of the constructions not so adversely. Secondly, based on the experimental data mathematical models of elements’ strength were obtained. These models allow evaluating the impact of each factor on the output parameter not only separately, but also in interaction with each other. Furthermore, the material spotlighted by the author describes stress-strain state of the investigated elements, cracking mechanism, changes of deflection values, the influence of mode cyclic loading during the tests. Since the data on the subject are useful and important to building practice, the ultimate aim of the tests will be working out for improvement of nonlinear calculation models of span reinforced concrete constructions taking into account the impact of these loads, and also there will be the development of engineering calculation techniques of their strength, crack resistance and deformability.

DOI: 10.22227/1997-0935.2015.9.36-50

References
  1. Babich E.M. Vliyanie dlitel'nykh i malotsiklovykh nagruzok na mekhanicheskie svoystva betonov i rabotu zhelezobetonnykh elementov [Influence of Long-Term and Low-Cycle Loads on the Mechanical Properties of Concrete and on the Work of Reinforced Concrete Elements]. Rovno, 1995, 386 p. (In Ukrainian)
  2. Albu E.I., Kitsak A.K., Semina Yu.A., Gaydarzhi A.P., Grebenyuk A.V., Sashin V.O., Karpyuk V.M. Metodika eksperimental'nykh issledovaniy napryazhenno-deformirovannogo sostoyaniya priopornykh uchastkov zhelezobetonnykh balok pri malotsiklovom nagruzhenii [Technique of Experimental Studies of Stress-Strain State of Reinforced Concrete Beams under Low-Cycle Loading in the Supporting Areas]. Stroitel'stvo — kak faktor formirovaniya komfortnoy sredy zhiznedeyatel'nosti: sbornik materialov V Respublikanskoy nauchno-tekhnicheskoy konferentsii (28 noyabrya 2013 g.) [Construction as a Factor of Comfortable Living Environment Formation: Collection of the Materials of the 5th Republican Scientific and Technical Conference]. Bendery, 2014. Рр. 3—10. (In Russian)
  3. Zalesov A.S., Klimov Yu.A. Prochnost' zhelezobetonnykh konstruktsiy pri deystvii poperechnykh sil [The Strength of Reinforced Concrete Structures under the Action of Shear Forces]. Kiev, Budіvel'nik Publ., 1989, 104 p. (In Russian)
  4. Korneychuk A.I., Masyuk G.Kh. Eksperimental'nye issledovaniya nesushchey sposobnosti naklonnykh secheniy izgibaemykh zhelezobetonnykh elementov pri deystvii malotsiklovykh znakoperemennykh nagruzok [Experimental Study of the Bearing Capacity of Inclined Cross Sections of Bending Reinforced Concrete Elements under the Action of Low-Cycle Alternating Loads]. Resursoekonomnye materialy, konstruktsii zdaniya i sooruzheniya : sbornik nauchnykh trudov [Resource Saving Materials, Buildings Constructions and Structures: Collection of Scientific Papers]. Rovno, 2008, no. 16, part 2, pp. 217—222. (In Ukrainian)
  5. Dorofeev V.S., Karpyuk V.M., Yaroshevich N.M. Prochnost' i treshchinostoykost' izgibaemykh zhelezobetonnykh elementov [Strength and Crack Resistance of Bending Reinforced Concrete Elements]. Vestnik OGASA [Bulletin of the Odessa State Academy of Building and Architecture]. 2008, no. 28, pp. 149—158. (In Russian)
  6. Karpyuk V.M. Raschetnye modeli silovogo soprotivleniya progonnykh zhelezobetonnykh konstruktsiy v obshchem sluchae napryazhennogo sostoyaniya [Calculation Models of Power Resistance of Girder Reinforced Concrete Constructions in General Case of Stress State]. Odessa, OGASA Publ., 2014, 352 p. (In Ukrainian)
  7. Gomon P.S. Rabota zhelezobetonnykh balok tavrovogo secheniya pri deystvii povtornogo nagruzheniya [Work of T-section Reinforced Concrete Beams under Repeated Loading]. Novye materialy, oborudovanie i tekhnologii v promyshlennosti : materialy Mezhdunarodnoy konferentsii molodykh uchenykh [New Materials, Equipment and Technologies in the Industry: Proceedings of the International Conference of Young Scientists]. Mogilev, 2009, p. 90. (In Ukrainian)
  8. Zarechanskiy O.O. Issledovanie szhato-izognutykh elementov pri povtornom deystvii poperechnoy sily vysokikh urovney [Research of Compressed-Bent Elements by Repeated Transverse Force of High Levels]. Resursoekonomnye materialy, konstruktsii zdaniya i sooruzheniya : sbornik nauchnykh trudov [Resource Saving Materials, Buildings Constructions and Structures: Collection of Scientific Papers]. Rovno, 2005, no. 13, pp. 129—135. (In Ukrainian)
  9. Zinchuk N.S. Eksperimental'nye issledovaniya napryazhenno-deformirovannogo sostoyaniya zhelezobetonnykh izgibaemykh elementov pri odnokratnom i malotsiklovom nagruzheniyakh v usloviyakh povyshennykh temperatur [Experimental Study of Stress-Strain State of Reinforced Concrete Bent Elements under the Single and Low-Cycle Loading at Elevated Temperatures]. Resursoekonomnye materialy, konstruktsii zdaniya i sooruzheniya : sbornik nauchnykh trudov [Resource Saving Materials, Buildings Constructions and Structures: Collection of Scientific Papers]. Rovno, 2004, no. 11, pp. 164—166. (In Ukrainian)
  10. Karavan V.V., Masyuk G.Kh. Rezul'taty eksperimental'nykh issledovaniy treshchinostoykosti i deformativnosti izgibaemykh zhelezobetonnykh elementov pri vozdeystvii malotsiklovykh znakoperemennykh nagruzok [The Experimental Results of Crack Resistance and Deformability Bending Reinforced Concrete Elements When Exposed to Low-Cycle Alternating Loads]. Stalezhelezobetonnye konstruktsii. Issledovanie, proektirovanie, stroitel'stvo, ekspluatatsiya : sbornik nauchnykh statey [Composite Structures. Research, Design, Construction, Operation: Collection of Scientific Papers]. Krivoy Rog, 2002, no. 5, pp. 168—172. (In Ukrainian)
  11. Grigorchuk A.B., Masyuk G.Kh. Prochnost' i deformativnost' zhelezobetonnykh elementov, kotorye podvergayutsya vozdeystviyu znakoperemennogo nagruzheniya [Strength and Deformability of Reinforced Concrete Elements That are Exposed to Action of Alternating Loading]. Sbornik materialov konferentsii Ch. 1. Stroitel'stvo [Collection of Conference Materials. Part 1 Building]. L'vov, 2001, pp. 29—34. (In Ukrainian)
  12. Karpenko N.I., Karpenko S.N. O postroenii bolee sovershennoy modeli deformirovaniya zhelezobetona s treshchinami pri ploskom napryazhennom sostoyanii [On Construction of a More Perfect Model of Deformation of Cracked Reinforced Concrete under Plane Stress State]. Beton i zhelezobeton — puti razvitiya : materialy ІІ Vserossiyskoy Mezhdunarodnoy konferentsii po betonu i zhelezobetonu (05.09—09.09.2002) [Concrete and Reinforced Concrete — Ways of Development: Materials of the 2nd All-Russian International Conference on Concrete and Reinforced Concrete]. Moscow, 2005, pp. 431—444. (In Russian)
  13. Zalesov A.S., Mukhamediev T.A., Chistyakov E.A. Raschet prochnosti zhelezobetonnykh konstruktsiy pri razlichnykh silovykh vozdeystviyakh po novym normativnym dokumentam [Calculation of the Strength of Concrete Structures under Different Force Actions on New Regulations]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 2002, no. 3, pp. 10—13. (In Russian)
  14. Babich E.M., Gomon P.S., Filipchuk S.V. Rabota i raschet nesushchey sposobnosti izgibaemykh zhelezobetonnykh elementov tavrovogo profilya pri vozdeystvii povtornykh nagruzok [Work and Calculation of the Bearing Capacity of Bending T-Sections Reinforced Concrete Elements under the Influence of Repeated Loads]. Rovno, NUVGP Publ., 2012, 108 p. (In Ukrainian)
  15. Masyuk G.Kh., Korneychuk A.I. Napryazhenno-deformirovannoe sostoyanie naklonnykh secheniy izgibaemykh zhelezobetonnykh elementov, kotorye podvergayutsya vozdeystviyu malotsiklovykh znakoperemennykh nagruzok [Stress-strain State of Incline Sections of Bending Concrete Elements That are Exposed to the Action of Low-Cycle Alternating Loads]. Resursoekonomnye materialy, konstruktsii zdaniya i sooruzheniya : sbornik nauchnykh trudov [Resource Saving Materials, Buildings Constructions and Structures: Collection of Scientific Papers]. Rovno, NUVGP Publ., 2008, no. 17, pp. 204—211. (In Ukrainian)
  16. Mel'nik S.V., Borisyuk O.P., Kononchuk O.P., Petrishin V.M. Issledovanie raboty usilennykh zhelezobetonnykh balok pri deystvii malotsiklovykh nagruzheniy [Research of Reinforced Concrete Beams Work under the Action of Low-Cycle Loading]. Resursoekonomnye materialy, konstruktsii zdaniya i sooruzheniya : sbornik nauchnykh trudov [Resource Saving Materials, Buildings Constructions and Structures: Collection of Scientific Papers]. Rovno, 2008, no. 17, pp. 404—410. (In Ukrainian)
  17. Koval'chik Ya.I., Koval' P.M. Issledovanie treshchinostoykosti predvaritel'no napryazhennykh zhelezobetonnykh balok pri vozdeystvii malotsiklovykh nagruzheniy [Investigation of Crack Resistance of Prestressed Concrete Beams under the Influence of Low-Cycle Loading]. Nauchno-prikladnye aspekty avtomobil'noy i transportno-dorozhnoy otrasley : Nauchnye zametki [Scientific and Practical Aspects of the Automobile and Transport Industries: Scientific Notes]. Lutsk, 2014, no. 45, pp. 282—287. (In Ukrainian)
  18. Dovbenko V.S. Issledovanie raboty zhelezobetonnykh balok, usilennykh polimernoy kompozitsiey pri vozdeystvii malotsiklovykh nagruzok [Research of Reinforced Concrete Beams Work Reinforced with Polymer Composition When Exposed to Low-Cycle Loads]. Resursoekonomnye materialy, konstruktsii zdaniya i sooruzheniya : sbornik nauchnykh trudov [Resource Saving Materials, Buildings Constructions and Structures: Collection of Scientific Papers]. Rovno, 2011, no. 22, pp. 787—794. (In Ukrainian)
  19. Babich V.E. Osobennosti raboty nerazreznykh zhelezobetonnykh balok pri povtornykh nagruzkakh [Features of Continuous Reinforced Concrete Beams Work under the Repeated Loads]. Stroitel'nye konstruktsii : sbornik nauchnykh trudov [Building Structures: Collection of Scientific Works]. Kiev, 2003, no. 58, pp. 8—13. (In Ukrainian)
  20. Drobyshinets S.Ya., Babich E.M. Rabota stalefibrobetonnykh i stalefibrozhelezobetonnykh balok pri odnokratnom i povtornom nagruzheniyakh [Work of Fiber Concrete and Fiber Reinforced Concrete Beams under the Action of Single and Repeated Loadings]. Stalezhelezobetonnye konstruktsii. Issledovanie, proektirovanie, stroitel'stvo, ekspluatatsiya : sbornik nauchnykh statey [Composite Structures. Research, Design, Construction, Operation: Collection of Scientific Papers]. Krivoy Rog, 2004, no. 6, pp. 65—71. (In Ukrainian)
  21. Valovoy M.A. Prochnost', deformativnost' i treshchinostoykost' zhelezobetonnykh balok pri vozdeystvii povtornykh nagruzok [The Strength, Crack Resistance and Deformability of Concrete Beams under the Influence of Repeated Loads]. Stalezhelezobetonnye konstruktsii. Issledovanie, proektirovanie, stroitel'stvo, ekspluatatsiya : sbornik nauchnykh statey [Composite Structures. Research, Design, Construction, Operation: Collection of Scientific Papers]. Krivoy Rog, 2008, no. 8, pp. 45—48. (In Ukrainian)

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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 RESEARCH INTO THE INFLUENCE PRODUCED BY PROCESS-RELATED AND STRUCTURAL PARAMETERSON THE BEARING CAPACITY OF METAL BEAMS WITH CORRUGATED WEBS

Vestnik MGSU 2/2013
  • Zubkov Vladimir Aleksandrovich - Samara State University of Architecture and Civil Engineering (SSUACE) Candidate of Technical Sciences, Professor, Department of Steel and Timber Structures, Samara State University of Architecture and Civil Engineering (SSUACE), 194 Molodogvardeyskaya st., Samara, 443001, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Lukin Aleksey Olegovich - Samara State University of Architecture and Civil Engineering (SSUACE) assistant lecturer, Department of Metal and Timber Structures; +7 (846) 332-14-65, Samara State University of Architecture and Civil Engineering (SSUACE), 194 Molodogvardeyskaya st., Samara, 443001, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 37-46

The article covers the experimental research into corrugated web beams exposed to the concentrated static load that has varied values of the width of load exposure. The authors describe the methodology of the experiment, instruments and machines involved in it, as well as the findings of the tests.Six beams with sinusoidal webs were selected for testing purposes. The beams were 6, 9 and 12 m long, and their cross sections were 500, 750 and 1,250 mm long. All beams were tested as single-span simply supported structures with hinged rigidly or loosely fixed supports.Beam tests have demonstrated that any failure to adhere to the beam manufacturing technology may seriously affect the load-bearing capacity of a beam. Any deviation of longitudinal axis flanges of beams from the longitudinal axis of a corrugated web in excess of 3 mm adversely affects the bearing capacity of beams and contributes to the overall beam stability loss.The research findings have demonstrated that the limit state of tested beams arises due to the stress in the web corrugation.

DOI: 10.22227/1997-0935.2013.2.37-46

References
  1. Azhermachev G.A. Ob ustoychivosti volnistoy stenki pri deystvii sosredotochennoy nagruzki [On Stability of a Wavy Wall Exposed to the Concentrated Load]. Izvestiya vuzov. Stroitel’stvo i arkhitektura [News of Higher Education Institutions. Construction and Architecture]. Novosibirsk, 1963, no. 3, pp. 50—53.
  2. Baranovskaya S.G. Prochnost’ i ustoychivost’ gofrirovannoy stenki stal’noy dvutavrovoy balki v zone prilozheniya sosredotochennykh sil [Strength and Stability of the Corrugated Steel Web I-beam Exposed to Concentrated Forces]. Novosibirsk, 1990, 18 p.
  3. Biryulev V.V., Ostrikov G.M., Maksimov Yu.S., Baranovskaya S.G. Mestnoe napryazhennoe sostoyanie gofrirovannoy stenki dvutavrovoy balki pri lokal’noy nagruzke [Local Stress State of the Corrugated Web of I-beams Exposed to the Local Load]. Izvestiya vuzov. Stroitel’stvo i arkhitektura [News of Higher Education Institutions. Construction and Architecture]. Novosibirsk, 1989, no. 11, pp. 11—13.
  4. Krylov I.I., Kretinin A.N. Effektivnye balki iz tonkostennykh profiley [Effective Thin-walled Beams]. Izvestiya vuzov. Stroitel’stvo. [News of Higher Education Institutions. Construction]. Novosibirsk, 2005, no. 6, pp. 11—14.
  5. Laznyuk M.V. Balki z tonkoyu poperechno gofrovanoyu st³nkoyu pri d³¿ statichnogo navantazhennya [Beams with a Thin Transversely Corrugated Web Exposed to the Static Load]. Kiev, 2006, 18 p.
  6. Stepanenko A.N. Issledovanie raboty metallicheskikh balok s tonkimi gofrirovannymi stenkami pri staticheskom zagruzhenii [Research into Behaviour of Thin-walled Corrugated Web Metal Beams Exposed to Static Loading]. Sverdlovsk, 1972, 20 p.
  7. Stepanenko A.N. Ispytanie alyuminievykh balok s gofrirovannoy stenkoy [Testing of Aluminum Beams with a Corrugated Web]. Izvestiya vuzov. Stroitel’stvo i arkhitektura [News of Higher Education Institutions. Construction and Architecture]. Novosibirsk, 1970, no. 1, pp. 31—35.
  8. Pichugin S.F., Chichulina K.V. Eksperimental’n³ dosl³dzhennya balok z prof³l’ovanoyu st³nkoyu [Experimental Researches into Beams with Profiled Surfaces]. Visnik DNABA [Proceedings of Donbas National Academy of Civil Engineering and Architecture]. 2009, no. 4 (78), pp. 161—165.
  9. Pasternak H., Kubieniec G. Plate Girders with Corrugated Webs. Journal of Civil Engineering and Management. 2010, no. 16 (2), pp. 166—171.
  10. Gao J., Chen B.C. Experimental Research on Beams with Tubular Chords and Corrugated Webs. Tubular Structures XII. Proceedings of Tubular Structures XII. Shanghai, China, 8—10 October 2008, pp. 563—570.

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