双肢剪力墙考虑剪切变形和转动惯量时的自振周期  

Calculation of Natural Vibration Period of Coupled Shear Wall Considering Shear Deformation and Moment of Inertia

作　　者：陈博文 任文杰 张松毅 CHEN Bowen;REN Wenjie;ZHANG Songyi(School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China;Qinggong College,North China University of Science and Technology,Tangshan 064000,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]华北理工大学轻工学院,河北唐山064000

出　　处：《防灾减灾工程学报》2021年第6期1264-1270,共7页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金项目(51878240)资助。

摘　　要：剪力墙结构在水平振动时的自振周期是确定地震作用时首要的动力特性参数。以双肢剪力墙为例,按是否考虑剪切变形和转动惯量的影响分成两种方法,根据结构自由振动微分方程及其自振周期公式,计算比较了不同墙肢宽高比下两种方法的计算结果,分析了剪切变形和转动惯量对结构自振周期的影响。计算结果表明:考虑剪切变形和转动惯量时,双肢剪力墙结构自振周期增加,且随着振型的提高自振周期涨幅增大;当左右墙肢宽度相等,墙肢宽高比大于等于1/7、1/9和1/12时,相应地计算结构第一、第二和第三自振周期时不能忽略剪切变形和转动惯量的影响。The horizontal natural vibration period of shear wall structure is the most important dynamic characteristic parameter for seismic design. Taking the coupled shear wall as an example,two methods are defined according to whether the shear deformation and moment of inertia are considered or not. Numerical simulation of the two methods for natural vibration period of the coupled shear wall with different width-height ratios of wall pier(B;/H)is conducted based on differential equations and period formulas of structural natural vibration. The influences of shear deformation and moment of inertia on the natural vibration period are analyzed. The results show that,while considering the shear deformation and moment of inertia,the natural vibration period increases,and more increment is seen on higher mode;while the width of two wall piers is equal,the influence of shear deformation and moment of inertia on the 1 st,the 2 nd and the 3 rd mode of the natural vibration period cannot be neglected for B;/H ≥ 1/7,1/9 and 1/12,respectively.

关 键 词：双肢剪力墙 剪切变形 转动惯量 自振周期 

分 类 号：TU973[建筑科学—结构工程]