"基于分层壳的装配式剪力墙抗震性能分析及模型验证研究"

Abstract The development of precast concrete structures in China has been rapid, with the shear wall system being the most widely used. One key issue in design is how to accurately and efficiently simulate the seismic performance of precast shear wall components and systems. In order to balance accuracy and cost, a finite element model for the seismic performance analysis of cast-in-place and prefabricated shear walls was established based on the layered shell element and the Clough constitutive model considering the slip effect of reinforcement and concrete. Combining existing seismic performance tests of cast-in-place and prefabricated shear walls, the finite element model was experimentally validated through comparison tests, focusing on the influence of different model parameter values on the simulation results of hysteresis performance of different forms of shear walls. The results show that the model based on layered shells can accurately simulate the seismic performance of shear walls primarily subjected to flexural failure, including pinching effects and stiffness degradation properties. For shear walls primarily subjected to shear failure, the model can also reflect the qualitative rules of damage and failure well, but there are still some differences in the stiffness degradation of the hysteresis curves, indicating that the existing elastic-plastic damage constitutive model cannot well reflect the shear behavior of concrete under cyclic loading. This study can provide reference for the seismic performance analysis and evaluation of prefabricated shear wall structures.