Abstract
Abstract A series of FEM analyses is made on steel box girder support diaphragms to investigate the local buckling behaviour near the support of such diaphragms. The arc-length increment technique is used for the elasto-plastic large deflection analysis. The thickness of the diaphragm plates, the stiffness of load-bearing stiffeners and material properties are adopted as parameters. According to the analysis results, local out-of-plane deformations or locally distributed stresses are found on the diaphragm plates near the support and, in some analysed models, torsional-buckling-like deformations appear at the bottom of the load-bearing stiffeners. The results show that the arrangements of stiffeners are required in the diaphragm panel substended by the load-bearing stiffener and the web plate.
Published Version
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