(北京峰源时代建筑工程咨询有限公司, 北京 100054)

摘要: 采用抗规方法与轴力法计算框架⁃剪力墙的框架、剪力墙倾覆力矩比,缺乏明确的推导背景与物理意义,且在工程实践中会得到不合理的结果,并且两种方法得到的结果差异甚大. 通过具体算例的计算结果阐述了抗规方法与轴力法不合理的原因,基于虚功原理提出了能量法的计算方法,用侧向力作用下框架部分的总虚内功与结构总虚内功的比值来界定抵抗侧向力的作用占比. 分析结果表明:抗规方法忽略了反弯点处相互剪力产生的应变能. 采用 SAP2000 软件,计算了 7 个平面框架⁃剪力墙结构体系以及 2 个三维算例体系作为验证,并说明了理论与应用的合理性. 结果表明能量法和基于力法的抗规方法与轴力法相比,物理意义更明确,可以同时考虑弯矩、轴力、剪力三个内力全部作用的影响.

关键词: 框架⁃剪力墙结构; 倾覆力矩比; 抗规方法; 轴力法; 能量法

中图分类号:TU318+. 1 文献标志码:A 文章编号:1002⁃848X(2022)16⁃0055⁃07

DOI:10. 19701 / j. jzjg. LS210160

Energy method to calculate overturning moment ratio of frame in frame⁃shear structure

WANG Yanfei, ZHANG Yifang

(Beijing Fengyuan Times Construction Engineering Consulting Co. , Ltd. , Beijing 100054, China)

Abstract: For frame⁃shear wall structure, due to the lack of a clear background of derivation and physical meaning,frame⁃shear wall, shear wall overturning moment ratio calculating seismic code method and axial force method sometimesunreasonable results in engineering practice, and the results obtained by the two methods are often very different. Theunreasonable reasons of seismic code method and axial force method were expounded through the calculation of specificexamples. Based on the principle of virtual work, the calculation method of energy method was proposed, and the ratio ofthe total virtual internal work of the frame part to the total virtual internal work of the structure under the action of lateralforce was used to define the ratio of resisting lateral force. The results of analysis show that the seismic code method ignoresthe strain energy generated by mutual shear forces at the reverse bending points. Seven plane frame⁃shear walls and twopractical project examples were calculated by SAP2000 software as verification, and the rationality of the theory andapplication was explained. The results show that the energy method have more explicit physical meanings than the seismiccode method and the axial force method, and the influence of bending moment, axial force and shear force simultaneouslycan be considered.

Keywords:frame⁃shear structure; overturning moment ratio; seismic code method; axial force method; energy method

第一作者:王雁飞,硕士,工程师,主要从事复杂结构设计研究,Email:568090673@ qq. com.

[引用本文] 王雁飞,张议方. 能量法计算框架⁃剪力墙结构框架倾覆力矩比[J]. 建筑结构,2022,52(16):55⁃61,73. WANG Yanfei,ZHANG Yifang. Energy method to calculate overturning moment ratio of frame in frame⁃shear structure[J]. Building Structure,2022,52(16):55⁃61,73.