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Title |
Analysis of Lateral Behavior of PSC Bridge Girders under Wind Load During Construction
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Authors |
이종한(Jong-Han Lee) ; 김경환(Kyung Hwan Kim) ; 조백순(Baiksoon Cho) |
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DOI |
http://dx.doi.org/10.4334/JKCI.2015.27.4.377 |
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Keywords |
PSC I 거더 ; 횡적 불안정성 ; 풍하중 ; 초기 횡변위 ; 초기 회전각 ; 유한요소해석 PSC I girder ; lateral instability ; wind load ; initial lateral deformation ; initial rotation ; finite element analysis |
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Abstract |
The span-lengthening of PSC I girder has increased the risk of lateral instability of the girder with the increases in the aspect ratio and self-weight of the girder. Recently, collapses of PSC I girder during construction raise the necessity of evaluating the lateral instability of the girder. Thus, the present study evaluated the lateral behavior and instability of PSC I girders under wind load, regarded as one of the main causes of the roll-over collapse during construction. Lateral instability of the girder is mainly dependent on the length of the girder and the stiffness of the support. The analysis results of this study showed the decrease in the critical wind load and the increase in the critical deformation and angle of the girder, leading to the lateral instability of the girder. Finally, this study proposed analytical equations that can predict the critical amount of wind load and lateral deformation of the girder, which would provide quantitative management values to maintain lateral stability of PSC I girder during construction.
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