考虑铺装层作用的改扩建拼宽板梁桥极限承载能力分析

Analysis of the ultimate bearing capacity of widened slab beam bridge considering the effect of pavement

针对高速公路改扩建过程中旧板梁桥极限承载能力不满足现行规范要求,通过考虑不同铺装层厚度及铰缝对结构极限承载能力的作用,对8-20 m板梁桥的极限承载能力进行了重新计算,经验算结果能够满足现行规范要求,并对旧桥利用给出了建议。

In view of the problem that the ultimate bearing capacity of the old slab beam bridge doesn't meet the requirements of the current code during the reconstruction and expansion of the expressway,recalculates the ultimate bearing capacity of the 8-20 m slab beam bridge by considering the effects of different pavement thickness and hinge joints on the structural ultimate bearing capacity,and the empirical calculation results can meet the requirements of the current code,and gives suggestions for the use of the old bridge.