桥面不平度对大跨度斜拉桥车辆振动的影响分析

Effects of Bridges Deck Surface Roughness on Vibration of Large Spancable-stayed Bridges Due to Moving Vehicles

将随机桥面平整度描述为零均值的平稳高斯随机过程,建立了大跨度斜拉桥空间有限元模型,考虑结构的初始应力效应和几何非线性因素,提出了一种斜拉桥车桥振动分析的简化方法。结合工程实例分析了桥面平整度对斜拉桥车辆振动的影响,为大跨度斜拉桥的科学管理和维护提供参考。

The random bridges deck surface roughness is described by a zero- mean stationary Gaussian random process and bridge is modeled by finite element method in the study. A simplified computing method considered initial stress effect and geometrical non-linearity of cable-stayed bridge for analyzing vibration of vehicle-bridges is applied. Effects of random road surface roughness on the impact effects due to moving vehicles are investigated referring to true bridge, put forward some advice for maintenance and management of cable-stayed bridges.