基于Monte Carlo法的多车道公路桥梁车流模拟  

Traffic Flow Simulation of Multi-lane Highway Bridge Based on Monte Carlo Method

作　　者：程高[1] 刘永健[1] 张俊光[1] 姚志刚[2] 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]长安大学经济与管理学院,陕西西安710064

出　　处：《重庆交通大学学报（自然科学版）》2011年第6期1375-1378,1434,共5页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：高等学校博士学科点专项科研基金项目(20090205110002);江西省交通运输厅重点科技项目(2010C00003)

摘　　要：在分析实测车辆数据的基础上,确定了模型车辆、车重、车头时距等交通特征的分布类型及参数。采用MonteCarlo法进行随机抽样,自编MATLAB程序,对自由车流进行模拟,得到车重、轴重在桥梁上的纵横向分布及其随时间变化情况;讨论了车辆占用车道不均匀系数的3种不同情况,发现轴重在桥上均呈多峰分布,峰值相近,但出现频率差异较大。Through analyzing vehicles＇ measurement data,the distribution and parameters of traffic characteristics such as model vehicles,vehicle weight and time headway etc.are determined.Samples are stochastically selected by the Monte Carlo method,and the MATLAB is also programmed.Finally,the free traffic flow is simulated,by which the vertical and horizontal distribution of the vehicle weight and axle load on bridge,and their changing conditions with time are obtained.In addition,three situations of lane coefficients of uniformity are also discussed.The result of discussion is that the axle load is of multi-peak distribution,which has close peak values but different frequency.

关 键 词：公路桥梁 车流模拟 MonteCarlo法 不均匀系数 

分 类 号：U448.14[建筑科学—桥梁与隧道工程]