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Title |
Study on Finite Element Model Updating of Bridge Considering the Continuity of PSC Girder Bridges
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Authors |
유용래(Yong-Rae Yu) ; 유훈(Hoon Yu) ; 안호준(Ho-June Ann) ; 이종재(Jong-Jae Lee) |
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DOI |
https://doi.org/10.11112/jksmi.2024.28.6.39 |
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Keywords |
부분 연속화 교량; 모델 업데이팅; 프리스트레스 콘크리트 교량 Partial continuity in continuous bridges; Model updating; Prestressed concrete girder bridges |
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Abstract |
During the industrialisation of the 1980s, many bridges were built in Korea and various continuity methods were applied. As time passed, the ageing of these bridges became an issue, making load-carrying capacity evaluations essential. In particular, PSC girder bridges built in the early 1980s have partial continuity, requiring specific modelling and evaluation methods. The model updating method that reflects the actual condition of the bridge can accurately predict and evaluate its behavior, thereby enhancing the reliability of the load-carrying capacity evaluation. The conventional load-carrying capacity evaluation methods have primarily targetting on fully continuous bridges; however, partially continuous bridges exhibit different load transfer characteristics, necessitating a differentiated approach. This study focuses on partial continuity in continuous bridges and suggests a method for load-carrying capacity evaluations, verified through field tests. Unlike previous studies that primarily focused on fully continuous bridges, this study aims to enhance the accuracy and reliability of load-carrying capacity evaluations for partially continuous bridges by proposing modeling and evaluation methods specifically tailored to these structures. Also, this study differentiates itself from previous research by improving the finite element model (FEM) to reflect the characteristics of bridges with only the deck slab made continuous. This improvement was validated using data from load tests conducted on actual bridges, confirming its potential for field application. The finite element model (FEM) was improved to reflect the characteristics of the bridge.
Data from Ambient Vibration Tests was used to improve the finite element model, resulting in a close match with the actual behavior of partially continuous bridges and confirming the model's ability to precisely evaluate load distribution and deflection., with errors between the updating FEM and measured deflections ranging from 0.8% to 3.9%, demonstrating its effectiveness.
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