DAMAGE IDENTIFICATION OF STRUCTURES WITH SUBSTRUCTURAL FLEXIBILITY

摘要：

　　Structural health monitoring systems rely on algorithms to detect potential changes in structural parameters that may be indicative of damage.For a large-scale structure,the local damage usually introduces slight change to the global modal data,which makes the local damage difficult to be detected.This paper proposes a new substructuring method for the damage detection of a structure.The global structure is divided into manageable substructures.The modal data measured on the global structure are disassembled for obtaining the independent substructural dynamic flexibility matrices,under the force and displacement compatibility constraints.Afterwards,the substructural flexibility matrix is decomposed into its eigenvalues and eigenvectors to be used as the indicators for damage detection.Since the substructuring method concerns the local area by treating it as an independent structure,the substructural eigenparameters are more sensitive to the local damage than the global eigenparameters.The proposed substructuring method is integrated with probability and statistical analysis upon a laboratory-tested portal frame structure.

关键词： Structural health monitoring damage detection substructure method

作者: Yong Xia Xiaoqing Zhou Shun Weng

作者单位: Department of Civil & Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloo College of Civil Engineering, Shenzhen University, Shenzhen, P.R.China School of Civil Engineering & Mechanics, Huazhong University of Science and Technology, Wuhan 430074

会议类型: 国际会议

会议名称: The Twelfth International Symposium on Structural Engineering (第十二届结构工程国际研讨会)

会议地点: 武汉

会议语种:英文

页码: 1573-1580

在线出版日期: 2012-11-17（万方平台首次上网日期，不代表论文的发表时间）