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	Damage diagnosis of a two-storey spatial steel braced-frame model
	Xiaodong, Ji ; Jiaru, Qian ; Longhe, Xu
	2010-05-11 ; 2010-05-11
关键词	damage diagnosis damage index damage locating vectors eigensensitivity analysis experimental study STRAIN-ENERGY CHANGE PARAMETER-IDENTIFICATION SHAPE NORMALIZATION SENSITIVITY FLEXIBILITY BRIDGE Construction & Building Technology Engineering, Civil Instruments & Instrumentation
中文摘要	To verify the effectiveness of the damage diagnosis methods, an experimental study of a two-storey spatial steel braced-frame structure model was carried out. The test model had plan dimensions of 1.50m x 1.50m and a height of 2.82m. Four known damage patterns, including single damage, symmetric damage, asymmetric damage and multi-storey damage, were simulated by removing different braces. Modal parameters of undamaged and damaged structures were obtained by employing the natural excitation technique (NExT) in conjunction with the eigensystem realization algorithm (ERA) from acceleration responses induced by hammer impacts and simulated ambient excitation. Finite element analysis using SAP2000 was performed to validate the identified modal parameters of the test model. The damage index method and the damage locating vectors (DLVs) method were utilized to locate damaged elements, respectively. Based on the identified modal information the damage extent (the stiffness loss) was estimated by using the second-order eigensensitivity approximation method. It is demonstrated that the above vibration-based methods are effective for damage diagnosis. Copyright (C) 2006 John Wiley & Sons, Ltd.
语种	英语 ; 英语
出版者	JOHN WILEY & SONS LTD ; CHICHESTER ; THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/27087]
专题	清华大学
推荐引用方式 GB/T 7714	Xiaodong, Ji,Jiaru, Qian,Longhe, Xu. Damage diagnosis of a two-storey spatial steel braced-frame model[J],2010, 2010.
APA	Xiaodong, Ji,Jiaru, Qian,&Longhe, Xu.(2010).Damage diagnosis of a two-storey spatial steel braced-frame model..
MLA	Xiaodong, Ji,et al."Damage diagnosis of a two-storey spatial steel braced-frame model".(2010).

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