钢筋混凝土剪力墙基于变形和滞回耗能非线性组合的损伤演化分析  

DAMAGE EVOLUTION ANALYSIS OF RC SHEAR WALL BASED ON NONLINEAR COMBINATION OF DEFORMATION AND HYSTERETIC ENERGY

作　　者：徐龙河[1] 肖水晶[1] 卢啸[1] 李忠献[2] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]天津大学滨海土木工程结构与安全教育部重点实验室,天津300072

出　　处：《工程力学》2017年第8期117-124,共8页Engineering Mechanics

基　　金：国家自然科学基金项目(51322806;51578058;51408034);中央高校基本科研业务费项目(2014JBZ011)

摘　　要：为研究钢筋混凝土结构的损伤演化规律,提出一种基于变形和滞回耗能非线性组合的钢筋混凝土构件损伤模型。通过引入组合参数考虑不同损伤状态下构件变形与滞回耗能的权重,该损伤模型能很好的反映变形和滞回耗能的相互影响,有效评估构件在不同破坏状态下的损伤程度。对4片钢筋混凝土剪力墙的拟静力试验进行数值模拟分析,结果表明:该损伤模型计算的损伤值与试验破坏形态吻合较好,能很好的描述钢筋混凝土剪力墙的损伤演化过程,且能够定量确定构件不同破坏程度的损伤界限;对钢筋混凝土剪力墙进行地震作用下动力时程分析,结果表明,该损伤模型能很好的描述不同峰值加速度作用下剪力墙构件的损伤演化规律,剪力墙损伤在峰值加速度出现时段内发展迅速,并且随着地震强度的增大而增大,损伤值超过限值时构件失效。To study the damage evolution law of RC structures, a nonlinear combination of deformation and hysteretic energy based RC components damage model is proposed, in which the combination parameters are defined to consider the weight of deformation and hysteretic energy under different damage states. The proposed model can reflect the mutual effect of deformation and hysteretic energy, and also can well evaluate the damage extent of components at different damage states. A series of pseudo-static tests of 4 RC shear wall specimens is simulated, and the results indicate that the proposed damage model can quantitatively determine the damage value which is in good agreement with the experimental phenomenon of various destruction levels. The proposed model can also give a better description of the damage evolution process of the four specimens than other damage model and quantitatively determine the damage boundary of specimens at different damage levels. Furthermore, the dynamic responses of one RC shear wall specimen due to earthquakes are analyzed, and the results show that the proposed damage model can describe the damage evolution process of RC shear wall due to earthquake with different peak accelerations. The calculated damage of shear wall develops rapidly at the peak acceleration and increases with the increase of seismic intensity until the component fails when the damage exceeds the threshold.

关 键 词：钢筋混凝土剪力墙 损伤演化规律 变形 滞回耗能 损伤模型 

分 类 号：TU398.2[建筑科学—结构工程] TU375