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Proceedings Paper

Field vibration tests-based model update for system identification of railway bridge
Author(s): Duc-Duy Ho; Jeong-Tae Kim; Jae-Hyung Park; Dong-Soo Hong
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Paper Abstract

In this study, a multi-phase model update approach for system identification of real railway bridge using vibration test results is present. First, a multi-phase system identification scheme designed on the basis of eigenvalue sensitivity concept is proposed. Next, the proposed multi-phase approach is evaluated from field vibration tests on Wondongcheon bridge which is a steel girder railway bridge located in Yangsan, South Korea. On the bridge, a few natural frequencies and mode shapes are experimentally measured under the excitation of trains, ambient vibration and free vibration. The corresponding modal parameters are numerically calculated from a three-dimensional finite element (FE) model which is established for the target bridge. Eigenvalue sensitivities are analyzed for potential model-updating parameters of the FE model. Then, structural subsystems are identified phase-by-phase using the proposed model update procedure. Based on model update results, a baseline model of the Wondongcheon railway bridge is identified.

Paper Details

Date Published: 1 April 2010
PDF: 12 pages
Proc. SPIE 7647, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010, 764731 (1 April 2010); doi: 10.1117/12.847268
Show Author Affiliations
Duc-Duy Ho, Pukyong National Univ. (Korea, Republic of)
Jeong-Tae Kim, Pukyong National Univ. (Korea, Republic of)
Jae-Hyung Park, Pukyong National Univ. (Korea, Republic of)
Dong-Soo Hong, Pukyong National Univ. (Korea, Republic of)


Published in SPIE Proceedings Vol. 7647:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010
Masayoshi Tomizuka, Editor(s)

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