基于实桥的超限车辆荷载模型及其荷载效应研究

发布时间：2018-05-11 18:12

本文选题：超限运输 + 荷载模型　；参考：《南昌大学》2014年硕士论文

【摘要】：随着我国城市化进程和现代化发展，再加上超载超限运输经济利益的驱动，超限车辆出现较为频繁。超限车辆对桥梁的使用会造成很大的安全隐患，甚至有桥梁直接被重型货车压垮的事件发生,然而超限运输是一个世界性难题,很难在短期内彻底解决，，因此，研究超限车辆荷载对桥梁的设计和维修具有重大意义。本文根据杭州市留石快速路段车辆荷载的长期监测数据，运用概率统计的基本理论和方法，首先对该路段的交通状况进行了统计分析，得到该路段的交通组成及分布情况；然后利用MATLAB计算软件编制相应程序，根据超限车辆判定标准筛选出超限车辆数据，并对超限车辆的总重、轴重、轴距等参数进行了统计分析，建立了超限车辆的荷载模型；最后通过MIDAS有限元分析软件对实桥进行建模，分析超限车辆荷载对实桥产生的荷载效应和两种状态下的内力效应，并与现行城市桥梁荷载进行比较分析，得到超限车辆导致实桥荷载效应及内力效应的增大系数，据此对桥梁结构进行评估。通过对监测路段交通状况的研究，证实了超限运输难以避免的事实；根据计算分析超限车辆荷载对实桥产生的荷载效应和内力效应的增加值，得到了超限车辆荷载会对桥梁的使用和寿命造成不利影响的结论；通过对实桥结构进行评估，验证了超限车辆对桥梁运营的影响；同时，本文建立的超限车辆荷载模型能为桥梁的设计和维修提供参考。
[Abstract]:With the development of urbanization and modernization in our country, and the drive of economic benefits of overload and overlimit transportation, the over-limit vehicles appear frequently. The use of overrun vehicles on bridges will cause great safety risks, and even some bridges will be crushed directly by heavy trucks. However, over-limit transportation is a worldwide problem, which is difficult to solve thoroughly in the short term, so, It is of great significance for the design and maintenance of bridges to study the overloading of vehicles. Based on the long-term monitoring data of vehicle load in the stone retaining expressway in Hangzhou, the traffic condition of the section is analyzed by using the basic theory and method of probability and statistics, and the traffic composition and distribution of the section are obtained. Then the corresponding program is compiled by MATLAB calculation software, and the data of overrun vehicle is screened according to the criterion of overrun vehicle, and the total weight, wheelbase and other parameters of the overrun vehicle are analyzed statistically, and the load model of the overrun vehicle is established. Finally, MIDAS finite element analysis software is used to model the real bridge, and the load effect caused by over-limit vehicle load on the real bridge and the internal force effect under two states are analyzed, and compared with the current urban bridge load. The increasing coefficients of load effect and internal force effect caused by over-limit vehicles are obtained, and then the bridge structure is evaluated. Through the study of the traffic condition of the monitoring section, the paper confirms the fact that it is difficult to avoid the over-limit transportation, and analyzes the added value of the load effect and the internal force effect of the over-limit vehicle load on the real bridge according to the calculation. It is concluded that the overrun vehicle load will have a negative impact on the use and life of the bridge. Through the evaluation of the actual bridge structure, the effect of the over-limit vehicle on the bridge operation is verified. At the same time, the influence of the overrun vehicle on the bridge operation is verified. The vehicle load model established in this paper can provide reference for bridge design and maintenance.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U441.2

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