(同济大学建筑设计研究院（集团）有限公司，上海 200092)

［摘要］对上海中心大厦基于性能的抗震设计所采用的地震波的选用进行了研究。由于上海地区场地特征周期较长，对于自振周期也较长的超高层建筑结构的抗震极为不利。因此，选用合理准确的地震波进行时程分析对于上海这类软土场地上建设的超高层建筑结构基于性能的抗震设计至关重要。在地震波的选用中综合考虑了场地类别、地震波数量、频谱特性、有效峰值、持续时间、统计特性、震源机制以及工程判断等方面的要求，同时给出上海中心大厦项目选用地震波的流程。最后，基于所选用的地震波，给出了结构弹性和弹塑性分析的结果。

［关键词］地震波选用; 基于性能的抗震设计; 长周期分量; 超高层建筑结构

Ground motion evaluation for performance-based seismic design of Shanghai Tower

Zhao Xin, Sun Huahua, Ding Jiemin, Qi Xiaoyu

(Architectural Design & Research Institute of Tongji University (Group) Co.,Ltd., Shanghai 200092, China)

Abstract:The ground motion evaluation procedure for the performance-based seismic design of Shanghai Tower was addressed. The site specific ground motions in Shanghai are characterized by high long period components, which is a serious disadvantage for  super high\|rise buildings with long vibration periods. The high quality ground motions are vital for performance-based seismic design of super high\|rise buildings in very soft site like Shanghai area. The critical topics for the ground motion evaluation procedure, including the site effects, ground motion number, spectrum characteristics, effective peak ground motion, time history scaling, time duration, fault mechanism and stochastic characteristics of the structural responses, were fully discussed. A ground motion evaluation procedure was proposed, and was applied in Shanghai Tower project to show the effectiveness of the procedure. Finally, the application method of the selected ground motions in the elastic and elasto\|plastic time history analysis of Shanghai Tower was discussed.

Keywords:ground motion evaluation; performance\|based seismic design; long period component; super high\|rise building

上海市科技攻关计划资助（09dz1207704）。

作者简介：赵昕，博士，高级工程师，