30 March 2009 Finite element-based damage identification of RC frames
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Abstract
The objective of this study is the application of finite-element based damage detection techniques to identify the damage severity of reinforced concrete structures subject to different intensity level of earthquake excitation. The damage detection procedure consists of two parts: (1) identify the system dynamic characteristics using the system identification technique (subspace identification, SI) from direct input/output measurements, (2) develop damage assessment of structural members (joints) based on the progressive finite element model and large-scale optimization with nonlinear least-square technique. To verify the proposed method, first, four specimens of two-bay one-story reinforced concrete frame and one two-story reinforced frame structure, with the same design detail and same construction material properties, are tested on the shaking table with different intensity level of earthquake excitations. Integrate the Subspace Identification method and the Finite-element based model updating, damage identification of the structures are investigated. The proposed finite-element based damage identification method were found to be a very effective method for damage assessment of frame structure.
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Jian-Huang Weng, Jian-Huang Weng, Chin-Hsiung Loh, Chin-Hsiung Loh, Shu-Hsien Chao, Shu-Hsien Chao, Wen-I Liao, Wen-I Liao, } "Finite element-based damage identification of RC frames", Proc. SPIE 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009, 72921R (30 March 2009); doi: 10.1117/12.812430; https://doi.org/10.1117/12.812430
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