运营车辆荷载发展变异及其对中小跨径拱桥受力影响的模拟分析

The development variations of operating vehicle load and the numerical simulation of its impact on medium and small span arch bridge

根据京珠高速公路南段某一收费站口的车辆荷载称重数据,分别以极值I型分布及Rice公式外推来预测在规定重现期内可能出现的车辆荷载最大值,在此基础上,对40m跨径的拱桥结构产生的拱顶正弯矩及拱脚负弯矩效应进行了计算,与现行规范中的设计荷载在桥梁上所产生效应值进行对比,旨在为我国公路桥梁车辆荷载标准的研究修订,以及车辆荷载分析提供参考。

Based on the vehicle load weighing data of a toll station in the southern section of Beijing-Zhuhai Expressway, this paper predicts the possible maximum vehicle load in a specified return period with the extreme value of Type I distribution and Rice formula extrapolation, and then calculates the positive bending moment of vault and negative bending moment of arch foot of the rib structure with 40 m span. The comparison is made between the numerical results and the bridge effect value of design load in current standard, and provide the reference to the study and revision of highway bridge vehicle load standard and the analysis of vehicle load of China.