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Proceedings Paper

Structural monitoring by system identification in time domain
Author(s): Chan Ghee Koh; C. Y. Liaw; B. Hong
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Paper Abstract

A system identification (SI) procedure to identify structural parameters is proposed in this paper. Instead of identifying parameters in the physical domain, which involves search in a large-dimensional parameter space, the search is made easier computationally in sub-domains orders. Modal decomposition technique is employed. The objective function is the minimization of error of modal response history. Physical parameters are then recovered by making use of modal orthogonality properties. The genetic algorithm is employed based on the principle of natural selection whereby better genes survive and propagate and therefore increase the change of converging to the best parameter set. For numerical study, a 10-story shear building is considered to illustrate the efficiency of the proposed procedure.

Paper Details

Date Published: 18 May 1999
PDF: 6 pages
Proc. SPIE 3671, Smart Structures and Materials 1999: Smart Systems for Bridges, Structures, and Highways, (18 May 1999); doi: 10.1117/12.348684
Show Author Affiliations
Chan Ghee Koh, National Univ. of Singapore (Singapore)
C. Y. Liaw, National Univ. of Singapore (Singapore)
B. Hong, National Univ. of Singapore (Singapore)

Published in SPIE Proceedings Vol. 3671:
Smart Structures and Materials 1999: Smart Systems for Bridges, Structures, and Highways
S.-C. Liu, Editor(s)

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