不同型式路桥过渡段动力特性对比分析

针对路桥过渡段的动力响应问题,通过建立轨道路基动力分析模型,结合商业软件FLAC对某客运专线加筋土路桥过渡段、级配碎石路桥过渡段进行了仿真分析,将2种过渡段的计算结果进行对比分析、并将加筋土路桥过渡段的计算结果与实测数据进行比较,结果表明该模型能反映系统振动特性,并从理论上论证了加筋土路桥过渡段比级配碎石路桥过渡更能阻止动应力与振动加速度在路基中的传播,能使路基受到更小的动荷载影响.

Comparative analysis of the dynamical characteristic of different types of road-bridge transition section

Based on the dynamic response problem of the roadbridge transition section,emulation analysis was done to the reinforced soil road-bridge transition section and graded broken stone road-bridge transition section of the passenger line using the commercial software FLAC,by building rail-base dynamic Analysis Model.The calculation results are compared and analyzed for the two sections.Comparison was wade for the reinforced soil road-bridge transition section with the measured data.The results show that the system vibration performance be deducted through the built model.It is theoretically proved that the reinforced soil road-bridge transition section can prevent more the transmission of the dynamic stress and vibration acceleration in the base compared to the graded broken stone road-bridge transition section, so that the base is less affected by the dynamic load.