人行激励下人行钢箱梁桥时程分析

摘要

Using MIDAS/Civil software to establish finite element model of the bridge. Then make the time history analysis of three kinds of basic working condition:one person walking,two person walking together,and a single run. Get maximum deformation and internal force value of every midspan. And comparing the analysis of different working conditions. Comparing single running and double walking,the impact load caused by running have a bigger role on the bridge. The phenomenon that the bridge and the person influence each other should be considered when designing.%运用MIDAS／Civil有限元建模软件建立某桥有限元模型，对单人步行、双人结伴步行以及单人跑步三种基本工况的时程进行分析，得到各跨跨中最大变形值与内力值，并对不同工况数值进行对比分析，由单人跑步与双人步行可知，跑动时引起的冲击荷载对桥体的作用较大，在设计时应该综合考虑工况与桥体自身的相互影响。