Numerical Study on Biaxial Seismic Performance of Reinforced Concrete Box Piers Based on OpenSees

[摘要] In order to study the seismic performance of reinforced concrete box piers under biaxial loading, the hysteretic model of reinforced concrete box piers was established by selecting appropriate material model, constitutive relation, structural element type, and the corresponding boundary conditions and loading method based on OpenSees. The numerical simulation of the ductility of reinforced concrete box piers with different axial compression ratio, stirrup ratio and slenderness ratio under biaxial horizontal loading was conducted. The results of biaxial quasi-static tests and that of numerical simulation were compared. The analysis showed that the hysteretic behaviour of reinforced concrete box piers under biaxial loading could be well simulated and the degradation of strength and stiffness of box piers in the process of bidirectional cyclic loading could be reflected by OpenSees on the basis of the appropriate material constitutive model and structural element type. Furthermore, the influence of reinforcement ratio and concrete strength on the ductility of reinforced concrete box pier was studied by OpenSees.

[发布机构] Northeast Electric Power University, Institute of Civil Engineering, Jilin, China^1;Beijing Electric Power Transmission and Transformation Company, Beijing, China^2

[效力级别] 无线电电子学

[关键词] Appropriate materials;Bi-directional cyclic loading;Constitutive relations;Hysteretic behaviour;Reinforcement ratios;Seismic Performance;Strength and stiffness;Structural elements