- 摘 要
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扶長生， 張小勇
（上海長福工程結(jié)構(gòu)設計事務所，上海 200011）[摘要] 綜述了推覆分析的發(fā)展歷史、基本原理及研究現(xiàn)狀，明確闡釋在線彈性階段，推覆分析等同于第一振型的反應譜分析。屈服后，使用經(jīng)過動力非線性分析校準的經(jīng)驗系數(shù)和線性等效，把反應譜理論推廣到非線性分析中。分析得到的目標位移及層位移曲線等具有統(tǒng)計意義上平均地震反應的數(shù)學意義。討論了推覆分析的局限性及其對策。結(jié)合中國設計市場的實際情況，給出推覆分析的實施要點。最后，借鑒美國性能設計的研究成果，成功地應用推覆分析對高烈度設防分區(qū)超限高層建筑的抗震性能作出評估。
[關鍵詞] 推覆分析；目標位移；反應譜分析；統(tǒng)計意義上的平均
中圖分類號：TU398.2 文獻標識碼：A 文章編號：1002-848X(2012) Sl-0014-11Theory and practice of the Push-over analysis
Fu Changsheng, Zhang Xiaoyong
( Shanghai ChinaFu Structural Design Inc., Shanghai 200011, China)Abstract: After briefly reviewing the development lustory, basic principle and current state of the art of Push-over analysis, authors directly point out that the Push-over analysis is equivalent in the elastic range to the response spectrum analysis only by using the first mode. After yielding, it can be interpreted as an extension of response spectrum analysis for linear structures to the non-linear range, by virtue of the empirical coefficients calibrated by a large number of dynanuc non-linear analyses and equivalent linearization. The target displacement and story displacement pattern along the height of the building obtained by the Push-over analysis are the mean of the seismic responses in the statistical mearung. The linutations of Push-over and the measures to be taken were also discussed. In combination of the current Chinese codes, guidelines for implementation of the Push-over analysis were given. Finally, the seismic performance of an irregular tall building in high seismicity zone was successfully estimated by using the Push-over analysis procedure compiled in PERFORM-3D in accordance with the acceptance criteria provided in ASCE 41.
Keywords: Push-over analysis; target displacement; spectrum analysis; statistical mean參考文獻
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