基于变形及滞回耗能的RC框剪结构地震损伤评估

为了研究RC框剪结构在地震作用下的损伤程度，通过引入基于结构广义刚度的构件重要性指标，提出考虑构件重要程度的地震损伤评估方法.首先，利用Perform-3D对RC框剪结构进行弹塑性时程分析，得到RC框剪结构的耗能分布模式.在此基础上，以地震变形、滞回耗能为基本参数，采用双参数构件损伤模型得到构件的损伤指数，利用基于构件重要性指标的楼层损伤模型得到楼层的损伤指数.最后，结合不同地震峰值加速度下结构的损伤指数、结构损伤程度与损伤指数范围的关系，评估结构在不同地震峰值加速度下的损伤程度.计算结果表明，考虑构件重要程度的地震损伤评估法，可以同时体现构件损伤程度与构件重要程度对楼层损伤的影响，可用于RC框剪结构的损伤评估.
To investigate the damage of RC frame-shear wall structures under earthquake load，a member importance index based on the generalized structural stiffness was introduced. First，seismic elastic-plastic analysis was made by using software perform-3D. Meanwhile，the rules of energy distribution were obtained for RC frame-shear-wall structures. Based on the deformation and hysteretic energy，a seismic damage model with double variables was built to evaluate the member damage，and floor damage model was developed to evaluate the floor damage based on member importance index. Finally，floor damage degree can be evaluated by comparison between damage index under different peak ground acceleration and index ranges. The results showed that the method reflected not only the member damage degree but also the member importance index having effect on floor damage，and the method was applicable to damage assessment for RC frame-shear-wall structures.