Dynamic Characteristics of Base-isolated RC Frame Structures under Ambient Excitation

	Dynamic Characteristics of Base-isolated RC Frame Structures under Ambient Excitation
	Han, Jianping 1,2; Wang, Hongtao 2; Liu, Yurtshuai 1,2; Luo, Weigang 1,2
	2011
关键词	based-isolated building dynamic characteristics ambient excitation modal parameter identification multi-objective optimization
页码	292-298
英文摘要	Ambient vibration tests were conducted on two base-isolated RC frame structures in order to investigate their dynamic characteristics. Modal frequencies, mode shapes and damping ratios were identified using Stochastic Subspace Identification (SSI) and Rational Fraction Polynomial (RFP) method. Then identified modal parameters were taken as the basis to inverse the actual horizontal equivalent stiffness of isolation layer under ambient vibration by multi-objective optimization method. Inversed results show that the actual stiffness value is 10. 9 times of that in the design case under frequently occurred earthquake level. Furthermore, damping characteristics and dynamic parameters of the base-isolated structure with the different shear deformation of rubber bearings were discussed. Finally, initial finite element model was updated based on the identified stiffness of isolation layer and finite element analysis was conducted further based on the updated model. Comparison of the results between analysis and test shows that the updated model can better represent the response of the base isolated structure under ambient vibration.
会议录	ADVANCES IN ENVIRONMENTAL VIBRATION
会议录出版者	SCIENCE PRESS BEIJING
会议录出版地	16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100707, PEOPLES R CHINA
语种	英语
WOS研究方向	Engineering ; Transportation
WOS记录号	WOS:000392358100041
内容类型	会议论文
源URL	[http://119.78.100.223/handle/2XXMBERH/37406]
专题	教务处（创新创业学院）
通讯作者	Han, Jianping
作者单位	1.Lanzhou Univ Technol, Key Lab Disaster Prevent & Mitigat Civil Engn Gan, Lanzhou 730050, Peoples R China 2.Lanzhou Univ Technol, Inst Earthquake Protect & Disaster Mitigat, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Han, Jianping,Wang, Hongtao,Liu, Yurtshuai,et al. Dynamic Characteristics of Base-isolated RC Frame Structures under Ambient Excitation[C]. 见:.