机车荷载对桥梁系统的影响分析

Influence Analysis of Locomotive Load on Bridge System

结合实际工程中的大跨桥梁,研究机车动载对桥梁系统的影响。通过经验分析法求出机车动载,施加在三维数值模型上,并运用映刻、弹性边界等手段保证弹塑性界面的接触及边界振动波的反射,从而得出机车驶过桥梁时,桥梁系统的位移响应及振动响应的变化规律。其成果对桥梁施工具有一定的指导意义。

The influence of locomotive dynamic load on the bridge system is studied based on the long-span bridge in practical engineering.The dynamic load of locomotive is calculated by the empirical analysis method,which is applied on the three-dimensional numerical model,and the contact of elastic-plastic interface and the reflection of boundary vibration wave are ensured by means of reflection and elastic boundary,so as to obtain the displacement response and vibration response of the bridge system when the locomotive passes the bridge beam.The results have certain guiding significance for bridge construction.