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高德志，  徐曉龍，  崔原豪
(北京邁達(dá)斯技術(shù)有限公司，北京100044)

[摘要] 在基于性能的抗震分析中要準(zhǔn)確地評(píng)價(jià)結(jié)構(gòu)的抗震性能需要能準(zhǔn)確地預(yù)測(cè)結(jié)構(gòu)的非線性特性?；谛阅艿目拐鹦阅茉u(píng)價(jià)方法中，目前被廣泛應(yīng)用的有靜力彈塑性( Pushover)分析方法。該方法在評(píng)價(jià)結(jié)構(gòu)整體的非線性響應(yīng)和結(jié)構(gòu)局部的非線性響應(yīng)時(shí)，需要使用能準(zhǔn)確反映結(jié)構(gòu)動(dòng)力特性的橫向荷載模式和能更合理地計(jì)算結(jié)構(gòu)的性能點(diǎn)位置的計(jì)算方法。本文提出了能合理且高效地評(píng)價(jià)結(jié)構(gòu)非線性響應(yīng)的方法，并且與現(xiàn)有的靜力和動(dòng)力彈塑性分析方法計(jì)算的整體響應(yīng)和局部響應(yīng)結(jié)果進(jìn)行了比較，驗(yàn)證了本文建議方法的準(zhǔn)確性和實(shí)用性。
[關(guān)鍵詞] 特征響應(yīng)；Pushover分析；動(dòng)力彈塑性分析；自適應(yīng)橫向荷載模式；基于延性的反應(yīng)譜；性能點(diǎn)

Modified Method for Seismic Performance Evaluation to Pushover Analysis
Gao Dezhi,  Xu Xiaolong,  Choi Wonho
( Beijing MIDAS Information Technology Co., Ltd, Beijing 100044, China)

Abstract: It is very important that predict the nonlinear seismic behavior exactly for seismic performance evaluation of a building in the Performance based seismic design. Evaluation method of seismic Performance based on the Pushover analysis reflected in PBSD was developed by some researchers. For the evaluation of nonlinear global and local seismic responses by Pushover analysis exactly, lateral load distribution considering the dynamic characteristics of structural system and performance point should be determined based on the evaluation of reasonable deformation capacity of a building more exactly. In this paper, the proposed method can be used to evaluate the seismic performance for the global nonlinear behavior of a building and to accurately estimate its local nonlinear seismic responses. In order to demonstrate the accuracy and validity of this method, nonlinear seismic responses estimated by the proposed method are compared with those obtained from other analytical methods.
Keywords: representative responses; Pushover analysis; inelastic time history analysis; adaptive lateral load pattern; response spectrum based on ductility; performance point