路网层次桥梁超限运输管理研究

发布时间：2018-05-09 10:15

本文选题：超限车辆 + 最优路径　；参考：《湖南大学》2015年硕士论文

【摘要】：公路桥梁是道路的咽喉,如果遭到破坏坍塌,就会造成该桥梁所在的整条线路都不能允许车辆通行,严重限制了线路的通行能力。然而超限车辆通过桥梁时,其荷载很大,通常都会对桥梁造成相当大的损坏,因此在过桥前应该验算超限车辆对桥梁产生的荷载效应以及桥梁结构的承载能力,并综合经济性和风险性两方面,依据验算结果在超限车辆运输前确定超限车的行驶路线。因此,建立一个安全、可靠、简单、实用的最优路径选取的方法,为超限车辆快速选取通行最优路线意义重大。本文主要从以下三个方面做了相关的研究工作:(1)运用可靠指标法从承载能力极限状态和正常使用极限状态两方面分别判别广西区某区域路网中桥梁超限车辆的通过权,即通过比较不同跨径和设计荷载等级下各超限车辆的过桥可靠指标与规定的桥梁构件最低容许可靠指标的大小,判别超限车辆的通过权;(2)详细介绍了两种网络连通可靠度的计算方法,即:串联、并联和混联体系的失效概率估算法和基于事件树的系统失效概率估算。基于风险分析理论,提出了超限车辆最优运输路径的确定方法;(3)以广西某区域实际路网为实例,分别建立了广西区五轴、六轴超限车辆总重与超限车通行网络连通可靠度的线性回归模型;运用风险理论,结合安全性与经济性对超限车可能通行各路径总费用进行了计算,并确定超限车最优路径,大致得到了超限车从起点至终点各轴重段最优路径的判别准则。
[Abstract]:The highway bridge is the throat of the road. If it is destroyed and collapses, the entire line in which the bridge is located will not be allowed to allow vehicles to pass through, which seriously limits the capacity of the line. However, when the vehicle passes through the bridge, the load is very heavy, which usually causes great damage to the bridge. Therefore, the load effect caused by the over-limit vehicle on the bridge and the bearing capacity of the bridge structure should be checked before crossing the bridge. According to the results of checking calculation, the route of the overrun vehicle is determined before the transportation of the overrun vehicle. Therefore, it is of great significance to establish a safe, reliable, simple and practical optimal route selection method for overrun vehicles. This paper mainly from the following three aspects of the relevant research work: 1) using the reliability index method from the bearing capacity limit state and the normal use of the limit state of two aspects, respectively, in a regional road network in Guangxi area bridge over the passage of vehicles right. That is, by comparing the bridge reliability index of each overrun vehicle and the minimum allowable reliability index of bridge member under different span and design load grade, In this paper, two methods to calculate the reliability of network connectivity are introduced in detail, that is, the method of estimating the failure probability of series, parallel and hybrid systems and the estimation of system failure probability based on event tree. Based on the theory of risk analysis, this paper puts forward the method of determining the optimal transportation route for vehicles in excess of the limit. Taking the actual road network in a certain area of Guangxi as an example, the five-axis of Guangxi region is established separately. The linear regression model of the connectivity reliability between the total vehicle weight of six axle overrun vehicle and the traffic network of the overrun vehicle is established, and the total cost of each possible passage path of the overrun vehicle is calculated by using the risk theory, combined with the safety and economy, and the optimal route of the overrun vehicle is determined. The criteria for determining the optimal path of each axle load section from the starting point to the end of the overrun vehicle are obtained.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U447

【参考文献】