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（1 深圳市力鵬工程結(jié)構(gòu)技術(shù)有限公司， 深圳 518034； 2 深圳大學(xué)土木與交通工程學(xué)院， 深圳 518060）

［摘要］針對(duì)框架-剪力墻結(jié)構(gòu)框架部分承擔(dān)傾覆力矩的不同計(jì)算方法進(jìn)行了分析研究，指出了抗規(guī)法的實(shí)質(zhì)是底層框架及以上隔離體所分配到的層水平外力對(duì)底層框架的力矩之和；指出了軸力法求矩點(diǎn)位置的確定具有不同的算法，不同的求矩點(diǎn)位置給出不同的計(jì)算結(jié)果。其中PKPM等軟件給出的軸力法求矩點(diǎn)實(shí)質(zhì)為受拉構(gòu)件合力點(diǎn)與受壓構(gòu)件合力點(diǎn)的中點(diǎn)；為解決軸力法的不足，在軸力法的基礎(chǔ)上提出了結(jié)構(gòu)底部抵抗傾覆力矩的三對(duì)力偶形式，改進(jìn)了現(xiàn)有軸力法。根據(jù)算例，抗規(guī)法計(jì)算結(jié)果均遠(yuǎn)小于軸力法、力偶法。軸力法與力偶法的差別在于不平衡力矩部分求矩點(diǎn)不一致；當(dāng)不平衡力矩為零時(shí)，如軸對(duì)稱(chēng)結(jié)構(gòu)，兩種方法計(jì)算結(jié)果一致；在一般情形下，兩種方法的計(jì)算結(jié)果存在一定的差異。

［關(guān)鍵詞］傾覆力矩；計(jì)算方法；外力矩；抗規(guī)法；軸力法；求矩點(diǎn)；力偶法

中圖分類(lèi)號(hào)：TU375文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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

作者簡(jiǎn)介：魏璉，研究員，博士生導(dǎo)師，Email:weilian@cszlps.com；通信作者：曾慶立，博士研究生，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:cengqingli2019@email.szu.edu.cn。