Dynamic characteristics of base-isolated RC frame structures under ambient excitation

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Dynamic characteristics of base-isolated RC frame structures under ambient excitation
	Han, Jianping 1,2; Wang, Hongtao 2; Liu, Yunshuai 1,2; Luo, Weigang 1,2
	2011
会议日期	October 20, 2011 - October 22, 2011
会议地点	Chengdu, China
关键词	Bridge decks Damping Inverse problems Modal analysis Multiobjective optimization Stiffness Stochastic systems Structural frames Structural panels Vibration analysis Ambient excitation Base isolated structure Damping characteristics Dynamic characteristics Frequently occurred earthquakes Isolated buildings Modal parameter identification Stochastic subspace identification
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 ofthat 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 - Proceedings of the 5th International Symposium on Environmental Vibration, ISEV 2011
会议录出版者	Science Press
语种	英语
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115896]
专题	土木工程学院教务处（创新创业学院）
作者单位	1.Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou; 730050, China 2.Institute of Earthquake Protection and Disaster Mitigation, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Han, Jianping,Wang, Hongtao,Liu, Yunshuai,et al. Dynamic characteristics of base-isolated RC frame structures under ambient excitation[C]. 见:. Chengdu, China. October 20, 2011 - October 22, 2011.