Solid Analysis of Torsional Effects on Small Radius Steel Plate Composite Beams Based on ABAQUS

In recent years, steel-mixed composite structures have been widely adopted in China, especially in projects such as urban overpasses and viaducts where steel plate composite girder bridges are widely used. However, the research on small radius steel plate composite curved girder bridges is relatively limited, and the theory of structural stress characteristics and computational analysis is lagging behind. It is found that the radius of curvature has a small effect on the torsional stress of the bridge top plate, but the torsional stress of the steel main girder is higher; the torsional stress of the steel main girder rises with the increase of the computed span diameter, and the concrete slab has a smaller effect; the number of steel girders has a small effect on the torsional stress of the bridge top plate but a significant effect on the steel main girder torsional stress. The results of the study can provide a reliable reference for future projects.