（武汉大学土木建筑工程学院,武汉 430072）

［摘要］针对复杂结构的各阶模态在地震反应中贡献悬殊，提出了基于模态参与因子的模态分析方法，以便于分析结构的动力特性和采用反应谱方法时结构反应的分析计算。通过动力特性分析和地震反应计算，验证了该方法的可靠性，并指出连体结构模态耦合复杂，高阶模

态参与的反应较大，同时指出，增加连接层数可以使薄弱单体的结构性能得到较好的改善。

［关键词］复杂结构；连体结构；模态选取；地震反应

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

作者简介：卢文汀，硕士，Email:luwenting168@163.com。