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(同濟(jì)大學(xué)建筑設(shè)計(jì)研究院（集團(tuán)）有限公司，上海 200092)

［摘要］對(duì)上海中心大廈基于性能的抗震設(shè)計(jì)所采用的地震波的選用進(jìn)行了研究。由于上海地區(qū)場(chǎng)地特征周期較長(zhǎng)，對(duì)于自振周期也較長(zhǎng)的超高層建筑結(jié)構(gòu)的抗震極為不利。因此，選用合理準(zhǔn)確的地震波進(jìn)行時(shí)程分析對(duì)于上海這類軟土場(chǎng)地上建設(shè)的超高層建筑結(jié)構(gòu)基于性能的抗震設(shè)計(jì)至關(guān)重要。在地震波的選用中綜合考慮了場(chǎng)地類別、地震波數(shù)量、頻譜特性、有效峰值、持續(xù)時(shí)間、統(tǒng)計(jì)特性、震源機(jī)制以及工程判斷等方面的要求，同時(shí)給出上海中心大廈項(xiàng)目選用地震波的流程。最后，基于所選用的地震波，給出了結(jié)構(gòu)彈性和彈塑性分析的結(jié)果。

［關(guān)鍵詞］地震波選用; 基于性能的抗震設(shè)計(jì); 長(zhǎng)周期分量; 超高層建筑結(jié)構(gòu)

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

上海市科技攻關(guān)計(jì)劃資助（09dz1207704）。

作者簡(jiǎn)介：趙昕，博士，高級(jí)工程師，