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http://dx.doi.org/10.12989/sem.2009.31.5.527

Periodic seismic performance evaluation of highway bridges using structural health monitoring system  

Yi, Jin-Hak (Coastal Engineering and Ocean Energy Research Department, Korea Ocean Research and Development Institute)
Kim, Dookie (Department of Civil and Environmental Engineering, Kunsan National University)
Feng, Maria Q. (Department of Civil and Environmental Engineering, University of California)
Publication Information
Structural Engineering and Mechanics / v.31, no.5, 2009 , pp. 527-544 More about this Journal
Abstract
In this study, the periodic seismic performance evaluation scheme is proposed using a structural health monitoring system in terms of seismic fragility. An instrumented highway bridge is used to demonstrate the evaluation procedure involving (1) measuring ambient vibration of a bridge under general vehicle loadings, (2) identifying modal parameters from the measured acceleration data by applying output-only modal identification method, (3) updating a preliminary finite element model (obtained from structural design drawings) with the identified modal parameters using real-coded genetic algorithm, (4) analyzing nonlinear response time histories of the structure under earthquake excitations, and finally (5) developing fragility curves represented by a log-normal distribution function using maximum likelihood estimation. It is found that the seismic fragility of a highway bridge can be updated using extracted modal parameters and can also be monitored further by utilizing the instrumented structural health monitoring system.
Keywords
seismic performance evaluation; seismic fragility curve; model updating; genetic algorithm; output-only modal identification;
Citations & Related Records
Times Cited By KSCI : 10  (Citation Analysis)
Times Cited By Web Of Science : 1  (Related Records In Web of Science)
Times Cited By SCOPUS : 4
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