（1 深圳市力鹏工程结构技术有限公司， 深圳 518034； 2 深圳大学土木与交通工程学院， 深圳 518060）

［摘要］针对框架-剪力墙结构框架部分承担倾覆力矩的不同计算方法进行了分析研究，指出了抗规法的实质是底层框架及以上隔离体所分配到的层水平外力对底层框架的力矩之和；指出了轴力法求矩点位置的确定具有不同的算法，不同的求矩点位置给出不同的计算结果。其中PKPM等软件给出的轴力法求矩点实质为受拉构件合力点与受压构件合力点的中点；为解决轴力法的不足，在轴力法的基础上提出了结构底部抵抗倾覆力矩的三对力偶形式，改进了现有轴力法。根据算例，抗规法计算结果均远小于轴力法、力偶法。轴力法与力偶法的差别在于不平衡力矩部分求矩点不一致；当不平衡力矩为零时，如轴对称结构，两种方法计算结果一致；在一般情形下，两种方法的计算结果存在一定的差异。

［关键词］倾覆力矩；计算方法；外力矩；抗规法；轴力法；求矩点；力偶法

中图分类号：TU375文献标识码：A文章编号：1002-848X(2021)10-0001-06

Study on calculation method for overturning moment carried by the frame part of the frame-shear wall structure

WEI Lian1, ZENG Qingli1,2, WANG Sen1

（1 Shenzhen Li Peng Structural Engineering Technology Co.,Ltd., Shenzhen 518034, China；2 College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China）

Abstract:Different methods for calculating overturning moment carried by the frame part of the frame-shear wall structure were analyzed. It was pointed out that the essence of the method of seismic design code is the sum of the moments to the bottom frame caused by horizontal external forces distributed by the bottom frame and the above isolator. It was pointed out that there are different algorithms for determining the point for calculating moment by the axial force method, and different points for calculating moment lead to different calculation results, and among them, the point for calculating moment by the axial force method given by PKPM and other software was essentially the midpoint of the resultant force point of the tension member and the resultant force point of the compression member. In order to solve the shortcomings of the axial force method, a three-pair couples of the structure bottom resisting the overturning moment was proposed on the basis of the axial force method, which improves the existing axial force algorithm. According to the calculation examples, the calculation results of the method of seismic design code were far less than those of the axial force method and the couple method. The difference between the axial force method and the couple method was that the unbalanced moment part is inconsistent in the point for calculating moment. When the unbalanced moment is zero, such as an axisymmetric structure, the calculation results of the two methods are consistent. In general, there is a certain difference in the calculation results of the two methods.

Keywords:overturning moment;calculation method;external moment;method of seismic design code;axial force method;point for calculating moment;couple method

作者简介：魏琏，研究员，博士生导师，Email:weilian@cszlps.com；通信作者：曾庆立，博士研究生，一级注册结构工程师，Email:cengqingli2019@email.szu.edu.cn。