公路桥梁标准疲劳车辆荷载研究

Research on Standard Fatigue Vehicular Load for Highway Bridges

为推导我国公路桥梁疲劳设计荷载标准,根据我国现有高速公路交通车辆荷载的调研数据,以等损伤度为理论基准,得出适用于不同地区的公路疲劳车辆荷载典型车式样,以上述疲劳典型车辆为蓝本,建立典型跨径的公路桥梁疲劳验算模型,进行构件疲劳损伤度计算,确定相应的公路桥梁疲劳车辆荷载标准车式样及对应跨径(或影响线长度)的纵向修正系数,由此构成完整的公路桥梁标准疲劳车辆荷载谱。这一结论为疲劳设计提供了标准车辆荷载谱,填补我国公路桥梁疲劳设计的空白。

In order to derive the standard fatigue design load for highway bridges,according to the existing research data of highway traffic load,from the principle of equivalent injury degree,highway fatigue typical vehicles for different areas are deduced.Based on above fatigue typical vehicle and highway bridge fatigue computational modeling with typical spans,the fatigue calculations are carried out,highway fatigue standard vehicle and longitudinal modified coefficient for various spans or the length of influence line are determined, which formed the integrated highway bridge standard vehicular load spectrum and filled the gaps in fatigue design of highway bridges.