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자료유형
학술저널
저자정보
Lee, Jaebeom (School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology [UNIST]) Lee, Young-Joo (School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology [UNIST]) Kim, Hyunjun (School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology [UNIST]) Sim, Sung-Han (School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology [UNIST]) Kim, Jin-Man (Korea Institute of Construction Technology [KICT])
저널정보
테크노프레스 Smart structures and systems Smart structures and systems 제17권 제1호
발행연도
2016.1
수록면
149 - 165 (17page)

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Floods have been known to be one of the main causes of bridge collapse. Contrary to earthquakes, flood events tend to occur repeatedly and more frequently in rainfall areas; flood-induced damage and collapse account for a significant portion of disasters in many countries. Nevertheless, in contrast to extensive research on the seismic fragility analysis for civil infrastructure, relatively little attention has been devoted to the flood-related fragility. The present study proposes a novel methodology for deriving flood fragility curves for bridges. Fragility curves are generally derived by means of structural reliability analysis, and structural failure modes are defined as excessive demands of the displacement ductility of a bridge under increased water pressure resulting from debris accumulation and structural deterioration, which are known to be the primary causes of bridge failures during flood events. Since these bridge failure modes need to be analyzed through sophisticated structural analysis, flood fragility curve derivation that would require repeated finite element analyses may take a long time. To calculate the probability of flood-induced failure of bridges efficiently, in the proposed framework, the first order reliability method (FORM) is employed for reducing the required number of finite element analyses. In addition, two software packages specialized for reliability analysis and finite element analysis, FERUM (Finite Element Reliability Using MATLAB) and ABAQUS, are coupled so that they can exchange their inputs and outputs during structural reliability analysis, and a Python-based interface for FERUM and ABAQUS is newly developed to effectively coordinate the fragility analysis. The proposed framework of flood fragility analysis is applied to an actual reinforced concrete bridge in South Korea to demonstrate the detailed procedure of the approach.

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