人行桥非理智人群荷载响应分析

Analysis on the Response of Footbridges with Non-rational Crowd Load

阐述了非理智人群荷载下人行桥的人致振动理论,对于非理智高密度人群荷载以及人群跳跃荷载分别进行了桥梁位移以及加速度响应分析。同时结合国内某人行桥实例,对非理智人群荷载所引起的桥梁响应与正常人群荷载进行对比分析。结果表明:非理智人群荷载对桥梁结构位移以及舒适性影响较为明显,在桥梁设计时应予以考虑。

The theory of Pedestrian - vibration with non - ration-al crowd Load was elaborated, and under the influence of high - density and Jumping crowd load, displacement and acceleration response of bridge were analyzed. At the same time,combined with an example of a domestic footbridge, the bridge response results was compared between unreasonable and natural pedestrian -induced forces. The conclusion illustrates that non - rational crowd Loads have a great impact on bridge structure displacement and comfort index and these factors should be considered in the design process.