变开缝长自复位剪力墙截面设计及抗震性能  

Section design and seismic performance of self-resetting shear wall with variable slit length

作　　者：吴逸文 朱杰江[1] WU Yiwen;ZHU Jiejiang(Department of Civil Engineering,Shanghai University,Shanghai 200444)

机构地区：[1]上海大学土木工程系,上海200444

出　　处：《上海大学学报（自然科学版）》2023年第3期512-524,共13页Journal of Shanghai University:Natural Science Edition

摘　　要：为研究不同开缝长度下自复位剪力墙的抗震性能,对自复位剪力墙截面进行受力分析,量化不同开缝长度下墙体理论承载力.基于四水准中第三水准下的性能目标,对自复位剪力墙进行截面设计,并与已有试验结果及不同开缝长自复位剪力墙的静力弹塑性结果进行比较验证.结果表明:理论推导的承载力表达式与已有试验及有限元结果均吻合良好;随着开缝长度增加,墙体自复位能力增强,耗能能力减弱;开缝长度系数为0.2~0.3能满足残余位移角限值,同时保持较好的耗能能力.The research aims to study the seismic performance of shear wall with different slotted lengths.Stress analysis of cross sections of shear wall were carried out to quantify the theoretical bearing capacity of the wall under different slotted lengths,and based on the performance goals in fourth level and under third level,cross section of self-reset wall was designed and compared with existing experimental results as well as static elastoplastic results of self-resetting shear wall with variable slit lengths for validation.The results show that the theoretical expression of the bearing capacity agrees with existing experimental andfinite element results.Moreover,with an increase in crack length,the self-repositioning ability of the wall increases,and the energy dissipation capacity decreases.A slit length coefficient of 0.2-0.3 adheres to the limit of residual displacement angle and maintains a satisfactory energy dissipation capacity.

关 键 词：自复位剪力墙 后张拉预应力 截面设计方法 底部开缝 静力弹塑性分析 

分 类 号：TU375[建筑科学—结构工程]