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依托泰州大桥,建立钢桥面板节段有限元模型,在考虑不同荷载工况组合的情况下,通过施加车轮荷载,研究顶板与U肋连接细节、U肋对接细节和U肋与横隔板连接细节的变形,同时分析3种典型细节的疲劳应力分布情况。研究表明:顶板与U肋连接细节接头处顶板底部横桥向应力约为顺桥向应力的2倍;车轮荷载顺桥向位置的改变是引起U肋对接细节承受拉压交替应力的主要原因;U肋与横隔板细节的面外变形由荷载顺桥向偏心作用及U肋变形约束引起。
Relying on the Taizhou Bridge, the finite element model of the steel bridge deck was established. Under the combination of different load conditions, the roof and U-rib connection details were studied by applying the wheel load. The U-rib docking details and U- Details of the deformation, while analyzing the three typical details of the fatigue stress distribution. The research shows that the transverse stress at the bottom of the roof joint with the U-rib connection detail is about double the stress along the bridge. The change of wheel load along the bridge position is the main reason that causes the U-rib mating detail to bear the tension-compression alternating stress. The out-of-plane deformation of the U-rib and the diaphragm is caused by the load-bearing bridge eccentricity and the U-rib deformation constraint.