边缘约束构件对钢筋混凝土剪力墙抗震性能的影响  

Influence of boundary element on seismic behavior of reinforced concrete shear walls

作　　者：章红梅[1] 吕西林[1] 鲁亮[1] 曹文清[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《地震工程与工程振动》2007年第1期92-98,共7页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(50025821;50321803)

摘　　要：钢筋混凝土剪力墙是高层建筑中的主要抗侧力构件,边缘约束情况是影响剪力墙抗震性能的一个重要因素。为研究边缘约束构件对钢筋混凝土剪力墙抗震性能的影响,本文进行了三片边缘约束情况不同的钢筋混凝土剪力墙的低周反复试验,并对试验结果进行了分析,分析内容包括:破坏形态、水平承载力、位移延性系数、刚度退化、抗震耗能能力等方面。研究结果表明,合理地设置边缘约束能够扩大塑性破坏区域,提高试件的水平承载力,改善其抗震耗能性能。研究进一步发现,边缘纵筋配筋率在提高试件的水平承载力,改善其抗震耗能性能和刚度退化程度方面影响显著,而边缘配箍率对抗震性能的贡献在本次试验分析中表现得并不明显。Reinforced concrete shear wall is a main lateral resistance member in tall buildings, and the boundary element is a key factor to influence the seismic behavior of shear walls. To find the influence of the boundary element on the reinforced concrete shear walls, 3 pieces of reinforced concrete shear walls with different boundary elements were made and tested under reversed cyclic quasi-static loading. The test results of the walls were also analyzed. The analysis includes the damage mode, the horizontal bearing capacity, the displacement ductility ratio, the rigidity degradation, the seismic energy dissipation capacity , and so on. The research results indicate that the reasonably setting boundary element can discretize the plastic damage area, enhance the horizontal bearing capacity, and improve the seismic energy dissipation capacity. An in-depth research indicates that the boundary ratio of longitudinal reinforcement has significant influence on the enhancement of the horizontal bearing capacity, the seismic energy dissipation capacity and the rigidity degradation. However, the boundary character value of stirrup does not have much contribution to the seismic energy dissipation capacity in this test analysis.

关 键 词：剪力墙 抗震性能 低周反复试验 边缘约束 滞回曲线 刚度退化 阻尼系数 

分 类 号：P315.9[天文地球—地震学]