基于WIM的城市桥梁车辆荷载概率模型
发布时间：2018-08-29 17:41
【摘要】：近二十年来汽车工业和交通运输的迅速发展,道路交通流量不断增长,重型车辆大量涌现,使得车辆荷载较以往发生了很大的变化。但是有关城市桥梁车辆荷载方面的研究较为滞后。本文基于安装在城市物流区快速路上的动态称重系统(WIM)采集到的车流数据,分析了车辆总重的数字特征,通过多重混合分布概率模型得到了车辆总重的三阶混合对数正态分布函数。基于经典极值理论,采用改进的Gumbel法,确定了目标基准期内车辆荷载的极值分布,建立了车辆荷载模型,得到目标基准期内车辆荷载评估值。该方法简单易行,稳定性好,易于工程应用。
[Abstract]:With the rapid development of automobile industry and transportation in the past two decades, the increase of road traffic flow and the emergence of heavy vehicles make the vehicle load change greatly compared with the past. However, the research on vehicle load of urban bridges is lagging behind. Based on the traffic flow data collected by the dynamic weighing system (WIM) installed on the expressway in the urban logistics area, this paper analyzes the digital characteristics of the total vehicle weight. The third order mixed logarithmic normal distribution function of total vehicle weight is obtained by using the multiple mixed distribution probability model. Based on the classical extreme value theory and the improved Gumbel method, the extreme value distribution of vehicle load in the target reference period is determined, and the vehicle load model is established, and the vehicle load evaluation value in the target reference period is obtained. The method is simple, stable and easy to be applied in engineering.
【作者单位】： 浙江大学建筑工程学院;杭州河川建设工程有限公司;浙江工业大学建筑工程学院;
【基金】：上海市博士后科研资助计划重点项目(13R21421100) 浙江省建设科技科研项目(2012049)
【分类号】：U441.2
[Abstract]:With the rapid development of automobile industry and transportation in the past two decades, the increase of road traffic flow and the emergence of heavy vehicles make the vehicle load change greatly compared with the past. However, the research on vehicle load of urban bridges is lagging behind. Based on the traffic flow data collected by the dynamic weighing system (WIM) installed on the expressway in the urban logistics area, this paper analyzes the digital characteristics of the total vehicle weight. The third order mixed logarithmic normal distribution function of total vehicle weight is obtained by using the multiple mixed distribution probability model. Based on the classical extreme value theory and the improved Gumbel method, the extreme value distribution of vehicle load in the target reference period is determined, and the vehicle load model is established, and the vehicle load evaluation value in the target reference period is obtained. The method is simple, stable and easy to be applied in engineering.
【作者单位】： 浙江大学建筑工程学院;杭州河川建设工程有限公司;浙江工业大学建筑工程学院;
【基金】：上海市博士后科研资助计划重点项目(13R21421100) 浙江省建设科技科研项目(2012049)
【分类号】：U441.2
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