Share Email Print
cover

Proceedings Paper

Damage detection using frequency response functions under ground excitation
Format Member Price Non-Member Price
PDF $17.00 $21.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

This paper deals with the problem of damage localization and quantification using the Frequency Response Function (FRF) subjected to earthquake ground excitation. The damage identification equation is derived from the motion equation of the system before and after damage. The FRFs of the intact and damaged system as well as the system matrices of the intact system are required to solve the damage identification equation. The system matrices can be obtained from the state matrices identified by subspace identification technique. According to the numerical study of a frame structure, only a few discrete frequencies from the FRFs which are close to the system natural frequencies are sufficient to achieve a satisfactory precision of damage extent. The proposed technique was applied to an experimental data of a 6-story steel frame structure and its efficiency was confirmed.

Paper Details

Date Published: 30 March 2009
PDF: 12 pages
Proc. SPIE 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009, 72923P (30 March 2009); doi: 10.1117/12.815441
Show Author Affiliations
Ting-Yu Hsu, National Taiwan Univ. (Taiwan)
Chin-Hsiung Loh, National Taiwan Univ. (Taiwan)


Published in SPIE Proceedings Vol. 7292:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009
Masayoshi Tomizuka, Editor(s)

© SPIE. Terms of Use
Back to Top