Damage assessment of shear wall components for RC frame-shear wall buildings using story curvature as engineering demand parameter
Damage assessment of shear wall components for RC frame-shear wall buildings using story curvature as engineering demand parameter
复制标题
以层曲率为工程需求参数的RC框架剪力墙构件损伤评估——剪力墙建筑
DOI：
10.1016/j.engstruct.2019.03.068
复制
发表时间：
2019-06-15
影响因子：
5.5
通讯作者：
Lin, Xuchuan
中科院分区：
文献类型：
--
作者：
Xiong, Chen;Lu, Xinzheng;Lin, Xuchuan
钢筋混凝土（RC）框架剪力墙结构在城市地区得到广泛应用。剪力墙作为抗侧力体系的主要组成部分，是此类结构抗震性能评估的关键组成部分。本研究提出了一种以层曲率作为工程需求参数（EDP）的剪力墙构件地震损伤评估方法。该方法包括(1)剪力墙层曲率计算方法和(2)使用层曲率作为EDP的剪力墙损伤极限确定方法。本研究中采用的层曲率是指各层内剪力墙的最大曲率。基于曲率分布的分段线性假设，楼层曲率计算方法需要楼层位移和剪力墙关键设计参数作为输入。同时，基于平面截面假设和截面分析，考虑剪力墙关键设计参数，如轴荷比、剪力墙构件长度和材料信息的影响，可以确定损伤极限，从而得到更准确的估计。最后，通过与多个墙板和RC框架剪力墙结构的数值结果进行比较，验证了所提出的方法。并与六层剪力墙试验和七层剪力墙结构实足振动台试验结果进行对比，进一步验证了该结论。
Reinforced concrete (RC) frame-shear wall structures are extensively used in urban areas. As a major part of the lateral load resisting system, the shear wall is a key component for the seismic performance assessment of such structures. In this study, a method for the seismic damage assessment of shear wall components is proposed by using the story curvature as the engineering demand parameter (EDP). The method involves (1) a shear wall story curvature calculation method and (2) a shear wall damage limit determination method that uses the story curvatures as the EDP. The story curvature adopted in this study denotes the maximum shear wall curvature within each story level. Based on the piecewise linear assumption of the curvature distribution, the story curvature calculation method requires story drifts and shear wall key design parameters as inputs. Meanwhile, based on the plane cross-sectional assumption and sectional analysis, the damage limits can be determined by considering the influences of the shear wall key design parameters, such as the axial load ratio, shear wall component length, and material information, thereby yielding more accurate estimation. Finally, the proposed method is validated by comparing it with the numerical results of several wall panels and an RC frame-shear wall structure. It is further validated by comparing it with the experiment results obtained from six shear wall tests and a full-scale shaking table test of a seven-story shear wall structure.