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Selection of Optimal Model for Structural System Identification  

Kwak, Hyun-Seok (인하대학교 토목공학과)
Kwon, Soon-Jung (인하대학교 토목공학과)
Lee, Hae-Sung (서울대학교 지구환경시스템공학부)
Shin, Soobong (인하대학교 토목공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.9, no.2, 2005 , pp. 217-224 More about this Journal
Abstract
A methodology of selecting an optimal model is proposed for applying a frequency-domain SI method effectively. Instead of using a reduced finite element model, a reasonably detail finite element model is established first and then the model is identified. To satisfy the identifiability criterion, a parameter grouping scheme is applied to control the number of unknowns. Among the simulated member grouping cases, an optimal model is selected as the one with the minimal statistical error. The proposed approach has been examined through simulation studies on a single span box-girder bridge.
Keywords
Optimal model; System identification; Modal data; Member grouping;
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