平面不規(guī)則結構扭轉效應分析的思考和討論
凱里
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凱里（中冶賽迪建筑設計研究院， 重慶 400013）［摘要］針對平面不規(guī)則結構在地震中的扭轉反應，研究了偏心方向對位移比的影響，比較并討論了相對扭轉響應和位移比這兩個控制指標的差別，證明了位移比并不能完全反映平面不規(guī)則結構的扭轉狀況。分析了不同地震作用方向對結構扭轉效應的影響。通過不同結構布置方案和地震作用形式的對比，證明了在實際工程設計中，應該根據(jù)每個結構的幾何形狀和構件分布形式，綜合分析地震扭轉反應，選取合理的衡量和控制指標，得出相應的最不利情況加以應對。［關鍵詞］平面不規(guī)則； 地震扭轉效應； 位移比； 相對扭轉響應； 地震作用方向中圖分類號：TU318.1文獻標識碼：A文章編號：1002848X(2013)07004705Thoughts and discussions on torsional response analysis of structures with irregular planeKai Li(Institute of Architecture Design, CISDI, Chongqing 400013, China)Abstract:Irregular plane structures suffer seismic torsional effect in the earthquake. The influence of eccentric direction on displacement ratio was studied. The differences between displacement ratio and relative torsinal effect were compared to prove that the displacement ratio can not reflect the torsional effect condition of irregular plane structures completely. The impact of different directions of horizontal earthquake action on torsional effect was analyzed. Different kinds of structural layouts and seismic effect forms were compared to prove that earthquakeinduced torsional effect should be considered comprehensively according to the geometrical characteristics and components layouts of each structure. Reasonable control indexes should be selected and the worst operating condition in design should be faced.Keywords:irregular plane; seismic torsional effect; displacement ratio; relative torsional effect; direction of seismic action作者簡介：凱里，碩士，工程師， Email:kai861220@yahoo.cn。參考文獻［1］JGJ 3—2010高層建筑混凝土結構技術規(guī)程［S］. 北京：中國建筑工業(yè)出版社，2011.［2］UBC97 Uniform building code: Structural design provisions［S］. International Conference of Building Officials (ICBD), 1997.［3］EC8 Euro code 8: Design of structures for earthquake resistancegeneral rules, seismic actions and rules for buildings［S］. London: British Standards Institution,2003.［4］徐培福,黃吉鋒,韋承基. 高層建筑結構的扭轉反應控制［J］. 土木工程學報,2006, 39(7): 18.［5］方鄂華,程懋堃.關于規(guī)程中對扭轉不規(guī)則控制方法的討論［J］. 建筑結構,2005, 35(11): 1215.［6］徐培福,黃吉鋒,韋承基.高層建筑結構在地震作用下的扭轉振動效應［J］. 土木工程學報,2000, 16(1): 16.［7］MAKARIOS TRIANTAFYLLOS. Optimum torsion axis to multistory buildings by using the continuous model of the structure［J］. The Structural Design of Tall and Special Buildings，2005, 14(1): 6990.［8］李劍，陳岱林.地震作用最大方向的確定［J］. 建筑科學,2005, 21(6): 1620.
