双室箱梁顶板的横向计算研究

Research on Lateral Calculation of Top Flanges for Twin-cell Box Girder

本文用有限条法计算了单箱双室箱形截面梁在标准布载情况下的横向弯矩，得到了顶板沿横向的弯矩包给图。据此，对照了按现行桥规关于有效宽度的规定和平面框架法、连续板简化法的计算结果，并得出有益的结论。

Using the finite strip method. this paper calculates the lateral moments of twin-cell box. girder under typical arrangement of loads, and obtaines the curves covering maximum lateral moments for top flanges of all sections. Based on these results, we can compare it with those, obtained by simplified methods either of plane frame analysis or of continuous slab analysis according to effective width provision of current' Highway Bridge Code', then we reached useful conclusions, which will be available for designs.