基于循环软化膜理论的钢筋混凝土剪力墙弹塑性分析

Elasto plastic Analysis of Reinforced Concrete Shear Walls Based on Cyclic Soften Membrane Model

摘要:

钢筋混凝土剪力墙及组合剪力墙是高层结构抗震的主要抗侧力构件之一.如何有效地模拟剪力墙构件在地震作用下的滞回性能，是高层结构抗震性能评估的关键问题之一.针对剪力墙构件弹塑性行为的特点，目前已经发展了多种微观和宏观分析模型.介绍了循环软化膜理论，基于该理论并利用OpenSees程序提出了不同类型剪力墙构件的建模方法，对11片不同破坏模式和不同配钢形式的剪力墙试件进行了低周反复加载数值模拟.计算结果表明，该分析方法不但能够很好地模拟不同类型剪力墙的整体滞回性能，而且可以预测局部材料应变信息，可为高层建筑结构抗震性能评估提供参考.

Abstract:

The reinforced concrete (RC) shear wall and composite shear wall is one of the predominant structural components used extensively in high rise buildings to resist lateral loads induced by earthquakes. How to simulate the hysteretic behavior of RC shear walls effectively under earthquakes is one of the key issues of seismic performance evaluation of high rise buildings. According to the features of elasto plastic responses of RC shear walls, several analytical models which could be classified into two groups, microscopic models and macroscopic models, were developed for RC shear walls. The theory of cyclic soften membrane model (CSMM) was introduced. Based on this theory, the modeling procedures for different kinds of shear walls were presented by using OpenSees program. The models were validated by comparing the calculated responses with the experimental results of 11 isolated walls with different failure modes and various steel encased profiles under cyclic loadings. Numerical simulation results indicate that such analytical method can predict effectively the global and local inelastic behavior (such as overall hysteretic behavior and local material strain) of the wall system, and it provides a reference to seismic performance assessment of high rise buildings.