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（武漢大學(xué)土木建筑工程學(xué)院,武漢 430072）

［摘要］針對復(fù)雜結(jié)構(gòu)的各階模態(tài)在地震反應(yīng)中貢獻懸殊，提出了基于模態(tài)參與因子的模態(tài)分析方法，以便于分析結(jié)構(gòu)的動力特性和采用反應(yīng)譜方法時結(jié)構(gòu)反應(yīng)的分析計算。通過動力特性分析和地震反應(yīng)計算，驗證了該方法的可靠性，并指出連體結(jié)構(gòu)模態(tài)耦合復(fù)雜，高階模

態(tài)參與的反應(yīng)較大，同時指出，增加連接層數(shù)可以使薄弱單體的結(jié)構(gòu)性能得到較好的改善。

［關(guān)鍵詞］復(fù)雜結(jié)構(gòu)；連體結(jié)構(gòu)；模態(tài)選取；地震反應(yīng)

Mode selection method of complex structure and application in connected structure

Lu Wenting, Cai Yuanqi, Zhu Yiwen

（Architecture & Civil Engineering Institute of Wuhan University,Wuhan 430072,China）

Abstract:Modal shape analysis method of complex structures,in which modality contribution is different, is proposed based on mode participation factor for dynamic characteristics analysis and computation of seismic response spectra. After analysis of dynamic characteristics and seismic response, reliability has been verified and the results indicate that the structure has complex modal and response of some higher modes are also predominant. Structural performance of weaksingle building can be improved by adding connecting layer.

Keywords:complex structure; connected structure; mode selection; seismic response

作者簡介：盧文汀，碩士，Email:luwenting168@163.com。