基于实桥车辆调查的矿区公路桥梁可靠度评估

发布时间：2018-01-23 04:40

本文关键词： 矿区公路桥梁汽车荷载可靠度分布类型统计参数　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着公路交通事业和汽车工业的发展，国家交通运输政策的不断完善，公路桥梁的汽车荷载发生了重大变化。特别是在矿区运煤路段，公路桥梁实际汽车荷载与《公路桥涵设计通用规范》（JTG D60-2004）规定的汽车荷载存在巨大差异。因此有必要对矿区公路桥梁实际车辆运行情况进行调查，制定与矿区实际车辆运行状况相符的汽车荷载标准，并评估实际汽车荷载作用下矿区公路桥梁的可靠度，为矿区公路桥梁安全运营提供技术支撑。本文依据矿区公路实际汽车荷载数据，开展了以下研究：（1）基于数理统计基本理论的归纳分析，明确了适合于汽车荷载统计分析的相关理论和方法；在对结构可靠度基本理论进行归纳分析的基础上，，推荐了考虑实际汽车荷载效应的桥梁结构可靠度分析理论和方法，为本文研究奠定了理论基础。（2）运用数理统计理论对实际汽车荷载数据进行统计分析，确定了汽车荷载相关要素（车型比例、车重、车间距、轴重和轴间距）的分布类型和统计参数。应用MATLAB软件，采用M-C法生成了堵车状态、启动状态和正常行驶状态下矿区公路的随机车辆荷载谱。（3）以简支梁桥为研究对象，采用随机车辆荷载谱在影响线上加载的方法得到桥梁结构在实际汽车荷载作用下的荷载效应最大值，从而确定了各行驶状态下汽车荷载效应标准值，制定了与实际汽车荷载相应的简支梁桥汽车荷载标准。（4）以矿区公路实际汽车荷载的随机车辆荷载谱为基础，运用结构可靠度理论，对矿区公路的典型实桥进行可靠度评估。比照实桥检测结果，对本文计算方法和计算结果进行了评价。
[Abstract]:With the development of highway transportation and automobile industry, and the continuous improvement of national transportation policy, the vehicle load of highway bridge has changed greatly, especially in the coal transport section of mining area. Actual vehicle loads of Highway Bridges and < General Design Code for Highway Bridges and culverts > JTG D60-2004). So it is necessary to investigate the actual vehicle operation of highway and bridge in mining area. To establish the vehicle load standards consistent with the actual vehicle operation status and to evaluate the reliability of road bridges in mining area under the action of actual vehicle loads. Based on the actual vehicle load data of mining area highway, the following research is carried out: 1) based on the inductive analysis of the basic theory of mathematical statistics, the relevant theories and methods suitable for the statistical analysis of vehicle loads are defined. Based on the induction and analysis of the basic theory of structural reliability, the theory and method of reliability analysis of bridge structure considering the effect of actual vehicle load are recommended, which lays a theoretical foundation for the research of this paper. 2) using mathematical statistics theory to analyze the actual vehicle load data, and determine the relevant factors of vehicle load (vehicle model ratio, vehicle weight, vehicle spacing). Using MATLAB software, M-C method is used to generate the random vehicle load spectrum of mining road under the condition of traffic jam, startup and normal driving. Taking the simply supported beam bridge as the research object, the maximum load effect of the bridge structure under the actual vehicle load is obtained by the method of loading the random vehicle load spectrum on the influence line. The standard value of vehicle load effect in each driving state is determined, and the vehicle load standard corresponding to the actual vehicle load is established. 4) based on the random vehicle load spectrum of actual vehicle load on mining road, the reliability of typical real bridge of mining road is evaluated by using the theory of structural reliability. The calculation method and results are evaluated.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U441.4;U448.14

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