关键词: 桥梁工程, 正交异性钢桥面板, 折线板, 挠度, 应力

Abstract: Aiming at the fatigue problem of the joint of longitudinal rib and cover plate, and the convergence of cover plate, longitudinal rib and beam in orthotropic steel bridge deck with closed ribs, a type of orthotropic steel bridge deck with folded plate was taken as the research object, and the numerical simulation test was carried out by applying wheel load at the most unfavorable position of the steel bridge deck. The influences of five section parameters, such as the thickness of the top plate dt, the thickness of the bottom plate db, and the thickness df, the height hf and the space lf of the folded plate, on the mechanical properties of the orthotropic steel bridge deck with folded plate were analyzed. Based on the middle beam segment of an orthotropic steel deck of a highway bridge, the itegral steel deck model analysis was carried out. According to the numerical simulation, the recommended design values of five section parameters of the orthotropic steel bridge deck are dt=11 mm、db=7 mm、dz=4 mm、hf=200 mm、lf=200 mm. The integral steel deck model analysis further confirmed that the steel bridge deck with folded plate not only avoids the most common part of fatigue, but also significantly improves the transverse mechanical properties of the bridge deck to a certain extent, while it has no effect on the longitudinal direction of the bridge.

Key words: bridge engineering, orthotropic steel bridge deck, folded plate, deflection, stress