深层混凝土搭板处治路桥过渡段的动力响应

以深层混凝土过渡板处治的路桥过渡段为主要研究对象,评估2种不同路桥过渡段处治方式的动力冲击作用,建立桥头搭板在不同置深情况下的路桥过渡段有限元数值分析模型,研究在车辆冲击荷载作用下路桥过渡段的动力响应及搭板的隔振效果.结果表明,传统的桥头搭板在车辆冲击荷载的作用下,受到的冲击作用明显,深置的混凝土过渡板由于板上土体分散部分的冲击荷载,受到的冲击作用较小,且深置的混凝土过渡板对桥台的影响较小,因此采用深层混凝土搭板处治路桥过渡段时能够提高混凝土搭板的耐久性.

Dynamic response of bridge approach treated with deep-seated concrete slab

The dynamic finite element analysis models of bridge approach with different treatment methods and concrete slab at different depth were established in order to assess the dynamic impact action of two different treatment methods at bridge approach, which is respectively treated with deep seated and traditional approach slab. The dynamic response of bridge approach and the vibration isolation effect of concrete slab were analyzed. Results show that the dynamic response of traditional approach slab under impact load of vehicle is more obvious than the deep seated concrete slab, because for the soil on the deep seated concrete slab distributing the impact action. The deep seated concrete slab has less effect on the abutment. The bridge approach treated with the deep seated concrete slab can enhance the durability of concrete slab.