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Proceedings Paper

Reference-based damage diagnosis of structure using embedded statistical model
Author(s): Chin-Hsiung Loh; Ai-Lun Wu; Shieh-Gown Huang; Shu-Hsien Chao
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Paper Abstract

This paper presents a damage assessment method using the measurement data of restoring force from a sub-structural system. A normalized hysteretic energy (NHE) for bi-linear model is developed as a function structural period and system ductility, which serves as a reference-based model for damage assessment. The stiffness degradation, strength deterioration and pinching effect in the inelastic hysteretic model are then determined from a series of nonlinear time history analysis of an inelastic SDOF system. Next, modification factors on the NHE for sensitivities of the inelastic model parameters are developed. Based on the identified model parameters by measuring the inelastic hysteretic behavior of the restoring force incorporated with the reference-based NHE model and the modification factor, the percentage of structural damage in relating to strength and stiffness degradation can be evaluated. Verification of the proposed method by simulation and experimental data of the cyclic loading and shaking table tests of the RC frame are conducted.

Paper Details

Date Published: 10 April 2007
PDF: 12 pages
Proc. SPIE 6529, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2007, 652931 (10 April 2007); doi: 10.1117/12.714101
Show Author Affiliations
Chin-Hsiung Loh, National Taiwan Univ. (Taiwan)
Ai-Lun Wu, National Taiwan Univ. (Taiwan)
Shieh-Gown Huang, National Taiwan Univ. (Taiwan)
Shu-Hsien Chao, National Taiwan Univ. (Taiwan)

Published in SPIE Proceedings Vol. 6529:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2007
Masayoshi Tomizuka; Chung-Bang Yun; Victor Giurgiutiu, Editor(s)

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