Application of Structural Health Monitoring System for Reliable Seismic Performance Evaluation of Infrastructures
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Title
- Application of Structural Health Monitoring System for Reliable Seismic Performance Evaluation of Infrastructures
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Author(s)
- Yi, Jin-Hak; Kim, Dookie; Go, Sunghyuk; Kim, Jeong-Tae; Park, Jae-Hyung; Feng, Maria Q.; Kang, Keum-Seok
- KIOST Author(s)
- Yi, Jin-Hak(이진학)
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Alternative Author(s)
- 이진학
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Publication Year
- 2012-06
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Abstract
- In this study, the useful application of an instrumented structural health monitoring (SHM) system is proposed for the reliable seismic performance evaluation based on measured response data. A seismic fragility is chosen as a key index for probabilistic seismic performance assessment on an infrastructure. The seismic performance evaluation procedure consists of the following five main steps; (1) measuring ambient vibration of a bridge under general traveling vehicles; (2) identifying modal parameters including natural frequencies and mode shapes from the measured acceleration data by output-only modal identification method; (3) updating linear structural parameters in a preliminary finite element (FE) model using the identified modal parameters; (4) analyzing nonlinear response time histories of the structure using nonlinear seismic analysis program; and finally (5) evaluating the probabilistic seismic performance in terms of seismic fragility. In the present study, the seismic fragility curves are represented by a log-normal distribution function. An instrumented highway bridge is utilized to demonstrate the proposed evaluation procedure and it is found that the seismic fragility of a highway bridge can be reliably evaluated by combining the modal information obtained from the instrumented SHM system and FE model updating by using the information.
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ISSN
- 1369-4332
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/3556
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DOI
- 10.1260/1369-4332.15.6.955
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Bibliographic Citation
- ADVANCES IN STRUCTURAL ENGINEERING, v.15, no.6, pp.955 - 967, 2012
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Publisher
- SAGE PUBLICATIONS INC
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Subject
- IDENTIFICATION
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Keywords
- seismic performance evaluation; structural health monitoring system; output-only modal parameter identification; real-coded genetic algorithm; seismic fragility index
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Type
- Article
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Language
- English
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Document Type
- Article
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