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论文类型： 期刊论文

发表时间： 2015-10-01

发表刊物： MEASUREMENT

收录刊物： SCIE、EI、Scopus

卷号： 74

页面范围： 92-102

ISSN号： 0263-2241

关键字： Fast damage detection; Damage localization; Random base excitation; Shear structures; Jerk energy; Curvature difference

摘要： This paper validates the use of two jerk energy-based damage localization methods, proposed for the regular test with pulse excitation in earlier work, in real-time damage detection of shear structures with random base excitation. First, a 20-story shear structure numerical model is considered to provide numerical validation with random base excitation. Then, performance of the two methods in damage detection is experimentally validated through a laboratory-scale 6-story shear structure model. Both experimental and numerical results of single and multiple damage cases with different levels of stiffness loss indicate that the two jerk energy-based methods can also be used in real-time damage detection of shear structures with random base excitation. The two jerk energy-based methods perform well in the presence of high noise level; moreover, they are model-free that avoid establishing the structural finite element model and model updating. (C) 2015 Elsevier Ltd. All rights reserved.