Statistical moment-based structural damage detection method in time domain  

作　　者：J.Zhang Y.L.Xu J.Li Y.Xia J.C.Li 

机构地区：[1]Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University [2]Department of Building Engineering,Tongji University [3]Faculty of Engineering,University of Technology Sydney

出　　处：《Earthquake Engineering and Engineering Vibration》2013年第1期13-23,共11页地震工程与工程振动（英文刊）

基　　金：The Hong Kong Polytechnic University through a PhD studentship for the first author;the Research Grants Council of Hong Kong (PolyU 5319/10E) for the second author

摘　　要：A novel structural damage detection method with a new damage index,i.e.,the statistical moment-based damage detection（SMBDD） method in the frequency domain,has been recently proposed.The aim of this study is to extend the SMBDD method in the frequency domain to the time domain for building structures subjected to non-Gaussian and non-stationary excitations.The applicability and effectiveness of the SMBDD method in the time domainis verified both numerically and experimentally.Shear buildings with various damage scenarios are first numerically investigated in the time domain taking into account the effect of measurement noise.The applicability of the proposed method in the time domain to building structures subjected to non-Gaussian and non-stationary excitations is then experimentally investigated through a series of shaking table tests,in which two three-story shear building models with four damage scenarios aretested.The identified damage locations and severities are then compared with the preset values.The comparative results are found to be satisfactory,and the SMBDD method is shown to be feasible and effective for building structures subjected to non-Gaussian and non-stationary excitations.A novel structural damage detection method with a new damage index,i.e.,the statistical moment-based damage detection（SMBDD） method in the frequency domain,has been recently proposed.The aim of this study is to extend the SMBDD method in the frequency domain to the time domain for building structures subjected to non-Gaussian and non-stationary excitations.The applicability and effectiveness of the SMBDD method in the time domainis verified both numerically and experimentally.Shear buildings with various damage scenarios are first numerically investigated in the time domain taking into account the effect of measurement noise.The applicability of the proposed method in the time domain to building structures subjected to non-Gaussian and non-stationary excitations is then experimentally investigated through a series of shaking table tests,in which two three-story shear building models with four damage scenarios aretested.The identified damage locations and severities are then compared with the preset values.The comparative results are found to be satisfactory,and the SMBDD method is shown to be feasible and effective for building structures subjected to non-Gaussian and non-stationary excitations.

关 键 词：damage detection statistical moment time domain NON-GAUSSIAN NON-STATIONARY experimental investigation 

分 类 号：TU317[建筑科学—结构工程] P631.44[天文地球—地质矿产勘探]