提高钢箱梁顶板整体刚度的优化研究

Study on the Optimization of Improving the Overall Stiffness of the Steel Box Girder Roof

针对钢混组合梁桥,钢箱梁顶板刚度小的特点,利用空间有限元进行模拟,提出四种解决方案。结合实际工程对进度的要求,最终确定使用槽钢作为背向加劲肋,增加钢箱顶板刚度。通过设置沉降观点,在混凝土桥面板浇筑过程中,进行实时观测顶板变形,确定该方案的合理性及实用性,为今后类似工程的应用提供良好借鉴。

Aiming at the steel-concrete composite beam bridge with the characteristics that steel box girder roof stiffness is small, four kinds of solutions are put forward using the space finite element simulation. Combined with the actual engineering requirements on the progress, ultimately determine the use of channels as back stiffener to increase the roof stiffness. Through setting the settlement observation point, in the concrete bridge deck pouring process, take the real-time observation for the roof deformation, determine the rationality and practicality of the program, so as to provide a good reference for the future application of similar projects.