独柱墩匝道桥抗倾覆研究

汲取独柱式桥梁倾覆事故的教训,结合现行的公路桥涵规范在抗倾覆性能方面的规定与要求,考虑超载车、重车对独柱墩桥梁的影响,本文拟定三种工况汽车荷载的组合作用,通过施加最大偏心荷载,计算独柱墩匝道桥在正常使用状态下的抗倾覆能力,对该桥梁在三种荷载工况下的抗倾覆性能进行验证,并对三种荷载工况下的结果进行横向比较,得出了一定的分析结果,为以后的桥梁加固与设计提供可靠、详实的资料,对桥梁的安全运营提供有力保障。

The Research of Single Column Pier Ramp Bridge Performance against Overturning

The single-column bridges learn the lessons of overturning accidents, combined with the existing highway bridge specification performance in overturning the regulations and requirements, consider overloading trucks, heavy trucks on the independence of the bridge piers, the paper developed three kinds of vehicle load condition. The combination effect, by imposing the maximum eccentric loading, calculating single column pier ramp bridge in the normal state resistance to overturning capacity of the bridge in the overturning of three load cases to verify the performance, and three kinds of loading conditions results under the horizontal comparison, some results obtained for future bridge strengthening and design to provide reliable, detailed information on the safe operation of the bridge to provide strong protection.