Stroitel’stvo: Nauka i Obrazovanie (Jun 2018)

ACCOUNTING THE COMBINED ACTION OF THE REINFORCED CONCRETE BUILDING WITH FOUNDATION SOIL IN CASE OF STRONG GROUND SHAKING

  • Mkrtychev Oleg Vartanovich,
  • Dudareva Marina Sergeevna

DOI
https://doi.org/10.22227/2305-5502.2018.2.3
Journal volume & issue
Vol. 8, no. 2
pp. 3 – 3

Abstract

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Subject of research: the study is aimed at overcoming such problems as accounting the combined action of the structure with base, as well as the modeling of structure concrete elements with nonlinear materials with direct reinforcement. The solution of such a complex task is not regulated by the current regulatory documents. Purposes: studying the behavior of a reinforced concrete building in case of seismic action with a correct account of the interaction of the structure with base and with the application of a complex approach to the modeling of the structure itself. Materials and methods: the correct account of the interaction of the building with the soil body is ensured by the application of the method of interaction between the structure and base. Under the seismic action in a closed soil body, the propagation of waves and their reflection from its boundaries is observed. To overcome this undesirable effect, “non-reflecting boundaries” are applied in the task, that are specified by means of the PML layer. The application of the PML layer helps to observe the real picture that occurs during the earthquake. In case of the modeling of the main bearing elements, concrete material is specified by a nonlinear model. The reinforcement of the building is modeled by the rod finite elements and is connected with concrete by means of Lagrangian-Eulerian meshes. Findings: the results of the conducted studies, namely the comparison of such parameters as the relative shift of the floor and the accumulation of damages in the structural elements, showed that without taking into account the interface of the interaction of the structure with base, we have underestimated values of these parameters. Conclusions: it is necessary to apply the method under consideration when proportioning of buildings designed in seismic regions, and also to solve similar complex tasks for studying the behavior of reinforced concrete structures during the earthquake.

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