高德志，  徐晓龙，  崔原豪
(北京迈达斯技术有限公司，北京100044)

[摘要] 在基于性能的抗震分析中要准确地评价结构的抗震性能需要能准确地预测结构的非线性特性。基于性能的抗震性能评价方法中，目前被广泛应用的有静力弹塑性( Pushover)分析方法。该方法在评价结构整体的非线性响应和结构局部的非线性响应时，需要使用能准确反映结构动力特性的横向荷载模式和能更合理地计算结构的性能点位置的计算方法。本文提出了能合理且高效地评价结构非线性响应的方法，并且与现有的静力和动力弹塑性分析方法计算的整体响应和局部响应结果进行了比较，验证了本文建议方法的准确性和实用性。
[关键词] 特征响应；Pushover分析；动力弹塑性分析；自适应横向荷载模式；基于延性的反应谱；性能点

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