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DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

The finite element method analysis of reinforced concrete structures with account for the real descriptionof the active physical processes

Vestnik MGSU 11/2013
  • Berlinov Mikhail Vasil'evich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Department of Reconstruction and Repair of Housing and Utility Objects, 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 .
  • Makarenkov Egor Aleksandrovich - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Reconstruction and Repair of Housing and Utility Objects, Moscow State University of Civil Engineering (MGSU), Moscow State University of Civil Engineering (MGSU); This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 26-33

It is well known, that buildings and their bearing structures are subject to ageing, including corrosion, deterioration, etc. When faults in bearing structure are detected, disposal-at-failure maintenance should be made. But before that, it is necessary to assess the rate of deterioration.The author suggests to use finite element method for calculation of the safety margin of reinforced concrete bearing structures, because the finite element method is widely used in engineering practice of structural design. In the process of engineering inspection of reinforced concrete structures all defects of the inspected structure should be clearly specified. The article suggests to create the FEM-Model of the inspected structure in view of the fact that this structure is defected. In order to achieve this effect, the stiffness matrix of some finite elements should be changed and the FEM-Model must be created of volumetric finite elements (the article speaks about eight-node parallelepiped elements).At first the FEM-Model will be created of eight-node parallelepiped elements with standard descriptions for the reinforced concrete; then finite elements in damage area must be changed. On the basis of integral estimation of the mode of deformation, deformation ratio will be calculated, which is essential for the description assignment of the changes in stiffness matrix. The formulation of the deformation ratio includes all the possible defects of structure through indexes, which must be analytically calculated depending on the concrete defect.The method described in the article is useful in the process of engineering inspection of the reinforced concrete structures. Using this method can sufficiently specify the safety margin of a defected structure and forecast the future operational integrity of this structure under the acting load.

DOI: 10.22227/1997-0935.2013.11.26-33

References
  1. Karpenko N.I. Obshchie modeli mekhaniki zhelezobetona [General Models of the Reinforced Concretes Mechanics]. Moscow, Stroyizdat Publ., 1996, 416 p.
  2. Karpenko N.I. Teoriya deformirovaniya zhelezobetona s treshchinami [The Theory of Deformation of the Reinforced Concrete with Cracks]. Moscow, Stroyizdat Publ., 1976, 205 p.
  3. Murashev V.I. Treshchinostoykost', zhestkost' i prochnost' zhelezobetona [Crack Strength, Stiffness and Strength of the Reinforced Concrete]. Moscow, Mashstroy-izdat Publ., 1958, 268 p.
  4. Klovanich S.F., Bezushko D.I. Metod konechnykh elementov v nelineynykh raschetakh prostranstvennykh zhelezobetonnykh konstruktsiy [The Finite Element Method for Nonlinear Analysis of Three-dimensional Reinforced Concrete Structures]. Odessa, OMNU Publ., 2009.
  5. Klovanich S.F., Balan T.A. Variant teorii plastichnosti zhelezobetona s uchetom treshchinoobrazovaniya [The Variant of the PlasticityTheory of the Reinforced Concrete Considering Crack Formation]. Priblizhennye i chislennye metody resheniya kraevykh zadach. Matematicheskie issledovaniya [Approximate and Numerical Methods of the Boundary Problems Solution. Mathematical Analysis]. Kishinev, ShTIINTsA Publ., 1988, no. 101, pp. 10—18.
  6. Singiresu S. Rao. The Finite Element Method in Engineering. Fourth edition. Elsevier Science & Technology Books, Miami, 2004.
  7. Filip C. Filippou. Finite Element Analysis of Reinforced Concrete Structures under Monotonic Loads. Structural Engineering, Mechanics and Materials. Department of Civil Engineering, University of California, Berkeley, Report No. UCB/SEMM-90/14, 1990.
  8. Larry J. Segerlind. Applied Finite Element Analysis. Second edition. John Wiley & Sons, Inc., New York, 1937.
  9. Bondarenko V.M., Bondarenko S.V. Inzhenernye metody nelineynoy teorii zhelezobetona [Engineering Methods of the Reinforced Concretes Nonlinear Theory]. Moscow, Stroyizdat Publ., 1982, 287 p.
  10. Prokopovich I.E., Ulitskiy I.I. O teoriyakh polzuchesti betonov [On the Theories of Concrete Production]. Izvestiya vuzov. Stroitel'stvo i arkhitektura [News of the Institutions of Higher Education. Building and Architecture].1963, no. 10, pp. 13—34.

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