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Proceedings Paper

Structural damage assessment using principal component analysis
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Paper Abstract

A novel structural damage assessment technique based on the principal component analysis (PCA) and the flexibility matrix approach is proposed in this paper. The technique is a model free method and can be used for detecting damage occurrence and location. The PCA is adopted firstly to decompose a set of correlated structural response measurements into statistically uncorrelated ones. Under the condition of small damping, these uncorrelated data can be shown to be related to modal responses and can be used to estimate the modal properties of a structure. The structural flexibility matrix can then be constructed using the estimated modal parameters. The change in the flexibility matrix gives an indication of the occurrence and location of structural damage. A numerical study on a 7-storey shear beam building model is performed to illustrate the applicability of the proposed technique. The results show that the proposed technique can accurately identify the occurrence and location of structural damage when the building is subjected to various earthquake excitations.

Paper Details

Date Published: 21 July 2004
PDF: 8 pages
Proc. SPIE 5394, Health Monitoring and Smart Nondestructive Evaluation of Structural and Biological Systems III, (21 July 2004); doi: 10.1117/12.540247
Show Author Affiliations
Chih-Chen Chang, Hong Kong Univ. of Science and Technology (Hong Kong China)
K. W. Sze, Hong Kong Univ. of Science and Technology (Hong Kong China)
Zhi Sun, Hong Kong Univ. of Science and Technology (Hong Kong China)


Published in SPIE Proceedings Vol. 5394:
Health Monitoring and Smart Nondestructive Evaluation of Structural and Biological Systems III
Tribikram Kundu, Editor(s)

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