拱梁组合结构桁架桥的随机疲劳荷载谱分析

Study on Stochastic Fatigue Load Spectrum for Arch-girder Truss Bridge

疲劳荷载谱的研究是钢桥疲劳分析的基础。通过对蕴藻浜大桥路段交通情况的实地调查,得到车辆重量及交通流量的一些统计参数值,并利用统计学蒙特卡罗理论及数据拟合的方法得到随机疲劳荷载谱。它为分析嘉定蕴藻浜大桥的疲劳应力提供理论基础。

Study on fatigue load spectrum is fundamental to the fatigue analysis of steel bridges. Through the site investigation of local traffic condition nearby Wenzaobang Bridge, some relevant statistical parameters for vehicle loads and traffic flow are obtained to deduce the stochastic fatigue load spectrum by use of Monte Carlo approach and data fitting method, which can provide theoretical foundation for fatigue stress analysis of this steel bridge.