Further development of statistical moment-based damage detection method

J. Zhang, You Lin Xu, Yong Xia, J. Li

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

A novel structural damage detection method with a new damage index has been recently proposed by the authors based on the statistical moments of dynamic responses of a shear building structure subject to white noise ground motion. The statistical moment-based damage detection (SMBDD) method is theoretically extended in this paper to include any types of structures with incomplete measured structural responses to various types of external excitations. The basic equations of the generalized SMBDD method are first given based on finite element (FE) method. The feasibility and effectiveness of the generalized method are then numerically investigated through a frame structure with incomplete measured responses. Various damage scenarios with different damage locations and damage severities are investigated by the generalized method using non-ground external excitations. The effects of measurement noise are finally investigated by contaminating the measured displacement responses with white random noise. The results show that the damage locations and their corresponding damage severities in various damage scenarios can be accurately identified even when the measurement noise is of a high level of 15% and the incomplete measured responses are considered. The main advantage of the SMBDD method that it is not only sensitive to structural damage but also insensitive to measurement noise is maintained in the generalized SMBDD method. The effectiveness and versatility of the generalized SMBDD method are therefore demonstrated.
Original languageEnglish
Title of host publicationICASS '09/IJSSD - Proceedings of Sixth International Conference on Advances in Steel Structures and Progress in Structural Stability and Dynamics
Pages323-330
Number of pages8
Publication statusPublished - 1 Dec 2009
Event6th International Conference on Advances in Steel Structures and Progress in Structural Stability and Dynamics, ICASS 2009 - Hong Kong, Hong Kong
Duration: 16 Dec 200918 Dec 2009

Conference

Conference6th International Conference on Advances in Steel Structures and Progress in Structural Stability and Dynamics, ICASS 2009
CountryHong Kong
CityHong Kong
Period16/12/0918/12/09

Keywords

  • Incomplete measured responses
  • Measurement noise
  • Random excitation
  • Statistical moment
  • Structural damage detection

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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