新型桥面板结构稳定性能研究

Study on the Stable Performance of New Bridge Panel Structure

分别建立了正交异性普通钢桥面板和正交异性钢-聚氨酯夹层桥面板的有限元模型,并另外建立了不同U型肋数量和不同面层钢板厚度的夹层板计算模型,在边界条件、加载情况均相同的条件下进行有限元模拟分析,夹层板采用板-实体-板结构模拟,结果表明:在相同条件下,夹层板比普通钢板屈曲临界应力、刚度、强度均有较大程度的提高,U型肋间距、面层钢板厚度对夹层板的屈曲临界应力及屈曲破坏形态有较大影响,两种因素分别超出一定范围后,对板整体的影响又受到相互制约。

Finite element models of orthotropic steel bridge deck and orthotropic steel-polyurethane sandwich bridge deck are established separately. At the same time, other SPS models analysis which varies in the amount of ＂ U＂ shaped ribbed stiffener and the thickness of face steel plate are set up. The finite element analysis is carried out under the same boundary conditions and loads, and the sandwich panels are simulated with shell-solid-shell structure. The results show that the critical buckling stress, stiffness and strength of sandwich panels having greater improvements than that of steel plates. The space of ribbed stiffener and the thickness of face bridge deck have significant influence on critical buckling stress and buckling failure pattern of the sandwich plate. However, when the two factors are beyond a certain range, the impact on the board is restricted by each other.