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,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.
Modal shape analysis methods of complex structures ,in which modality contributions are different, have proposed based on mode participation factor for dynamic characteristics analysis and computation of seismic response spectra. Through analyzing the dynamic characteristics and seismic response, the reliability of the method has been verified; and the results indicate that the structure has complex modal and response of some higher modes are also predominant. And it is pointed out that the structural performance of weak single building can be improved by adding connecting layer.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2007年第1期74-77,共4页
Engineering Journal of Wuhan University
关键词
复杂结构
连体结构
模态选取
地震反应
complex structure
connected structure
mode selection
seismic response
