- 摘 要
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(北京峰源時代建筑工程咨詢有限公司, 北京 100054)
摘要: 采用抗規(guī)方法與軸力法計算框架?剪力墻的框架、剪力墻傾覆力矩比,缺乏明確的推導背景與物理意義,且在工程實踐中會得到不合理的結果,并且兩種方法得到的結果差異甚大. 通過具體算例的計算結果闡述了抗規(guī)方法與軸力法不合理的原因,基于虛功原理提出了能量法的計算方法,用側向力作用下框架部分的總虛內功與結構總虛內功的比值來界定抵抗側向力的作用占比. 分析結果表明:抗規(guī)方法忽略了反彎點處相互剪力產生的應變能. 采用 SAP2000 軟件,計算了 7 個平面框架?剪力墻結構體系以及 2 個三維算例體系作為驗證,并說明了理論與應用的合理性. 結果表明能量法和基于力法的抗規(guī)方法與軸力法相比,物理意義更明確,可以同時考慮彎矩、軸力、剪力三個內力全部作用的影響.
關鍵詞: 框架?剪力墻結構; 傾覆力矩比; 抗規(guī)方法; 軸力法; 能量法
中圖分類號:TU318+. 1 文獻標志碼:A 文章編號: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:王雁飛,碩士,工程師,主要從事復雜結構設計研究,Email:568090673@ qq. com.
[引用本文] 王雁飛,張議方. 能量法計算框架?剪力墻結構框架傾覆力矩比[J]. 建筑結構,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.
