The stability analysis of the reinforced concrete column under transverse shock impacts

Approaches to assessing the stability of reinforced concrete columns upon occurrence of a transverse accidental impact are considered. For that to examine, the finite element modeling of the system in a 3D-solid formulation and the calculation according to the deformed scheme within the confines of...

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Bibliographic Details
Main Authors: Tamrazyan, Ashot, Alekseytsev, Anatoly, Chernova, Daria
Format: Conference Proceeding
Language:English
Subjects:
Catastrophic collapse
Compressive properties
Concrete columns
Concrete structures
Deformation
Design optimization
Design standards
Elastoplasticity
Finite element method
Mathematical analysis
Mathematical models
Modulus of elasticity
Newton-Raphson method
Nonlinearity
Rebar
Reinforced concrete
Shock loads
Stability analysis
Transient response
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Summary:Approaches to assessing the stability of reinforced concrete columns upon occurrence of a transverse accidental impact are considered. For that to examine, the finite element modeling of the system in a 3D-solid formulation and the calculation according to the deformed scheme within the confines of the nonlinear static analysis and dynamic transient response were performed. To create the model hexahedral solid elements working in accordance with the Drucker-Prager model were used for the concrete, and spatial beam elements deformed according to the elasto-plastic nonlinearity model were taken for the rebar. The search for the most dangerous location of the horizontal shock load along the column height was carried out. The presence of cracking in concrete was taken into account when introducing the reduction coefficient of the elasticity modulus of concrete in accordance with the design standards. Consideration of the compressive stresses of rebars during horizontal impact was carried out by adjusting the initial modulus of elasticity. The nonlinear problem was solved by the Newton-Raphson method with the criterion of convergence in the magnitude of the nodal forces. The shock impact was considered in the form of a short-term impulse of constant intensity. The nature of the change in the critical force depending on the dimension of the transverse impact has been obtained for various scenarios of emergency impacts on the column. The research results can be used to assess the resistance of reinforced concrete structures to the progressive collapse during their optional design and optimization.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0103414