T形截面剪力墙约束边缘构件设计建议  

Design suggestion for special boundary element of T⁃shaped shear wall

作　　者：张微敬[1] 李泽川 ZHANG Weijing;LI Zechuan(Faculty of Architecture,Civil and Transportation Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学城市建设学部,北京100124

出　　处：《建筑结构》2024年第16期78-85,59,共9页Building Structure

基　　金：国家自然科学基金面上项目(52078012)。

摘　　要：约束边缘构件的构造对剪力墙抗震性能影响较大,抗震规范对T形截面剪力墙约束边缘构件的配筋及长度的相关规定可能存在不足。为研究T形截面剪力墙约束边缘构件的合理构造,基于有限元平台OpenSEES,建立了T形截面剪力墙纤维模型,仿真结果与试验数据吻合良好,验证了有限元模型的合理性和可靠性。在此基础上,研究T形截面剪力墙翼缘端约束边缘构件纵筋配筋率和腹板自由端约束边缘构件长度对其抗震性能的影响,结果表明:抗震规范对T形截面剪力墙翼缘端约束边缘构件纵筋配置的要求过于保守;降低翼缘端约束边缘构件的纵筋配筋率、同时增加腹板端约束边缘构件长度,可显著提升T形截面剪力墙抗震性能,且用钢量减少。借鉴美国规范ACI 318⁃19,提出了确定T形截面剪力墙腹板端约束边缘构件长度的简化方法,给出了T形截面剪力墙约束边缘构件的设计建议。The configuration of special boundary element has a great influence on the seismic behavior of shear wall,and the relevant provisions of the reinforcement and the length of special boundary elements of T⁃shaped shear wall may be inappropriate in the seismic code.In order to study the reasonable configuration of special boundary elements of T⁃shaped shear wall,T⁃shaped shear wall fiber models were established based on the finite element platform OpenSEES,and the simulation results are in good agreement with the test data,which verified the rationality and reliability of the finite element model.On this basis,the effects of the longitudinal reinforcement ratio of special boundary element at the flange end and the special boundary element length at the free end of the web on the seismic behavior of the T⁃shaped shear wall were studied.The results show that the seismic code is too conservative in the longitudinal reinforcement configuration of the special boundary element at the flange end of T⁃shaped shear wall.The seismic behavior of T⁃shaped shear wall can be significantly improved by decreasing the ratio of longitudinal reinforcement of special boundary element at the flange end and increasing the length of special boundary element at web end,and the steel consumption is reduced.With reference to American code ACI 318⁃19,a simplified method for determining the length of special boundary elements at the web end of T⁃shaped shear wall was proposed,and the design suggestions for special boundary elements of T⁃section shear wall were given.

关 键 词：T形截面剪力墙 约束边缘构件 构造要求 抗震性能 

分 类 号：TU375[建筑科学—结构工程]