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A Behavioral Analysis of Curved Steel Box Bridge Associated with Diaphragm's Shape and Spacing  

Kim, Yun-Tae (서울산업대학교 구조공학과)
Kim, Sang-Chel (한서대학교 토목공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.10, no.1, 2006 , pp. 205-215 More about this Journal
Abstract
In this study 3-D shell FEM model was applied to analyze the behavior of curved steel box girders stiffened by diaphragms. The reliability of the analytical method has been proved by comparing with the existing results. It was also found from this analysis that main factors affecting a distortional stress are length of a girder, curvature of the girder, and spacing of diaphragms. A modelled bridge with 30m of span length and 40m of radius was analyzed to find an optimum spacing of diaphragm, and as a result of applying different spacings, 5m was found to be most appropriate to control the stress ratio regulated by specifications. In the effect of diaphragm shape, the rhamen-typed diaphragm is found to be more effective than the fully filled-up one in the range of opening ratio of 0.4 to 0.6. But, the fully filled-up diaphragm had more efficiency in terms of reducing the distortional stress than X-truss typed diaphragm.
Keywords
Distortional Stress; Ratio of Distortional to Bending Stresses; Diaphragm's Spacing; Diaphragm's Shape; Opening Ratio;
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