基于超载运输的在役中小跨径桥梁承载力研究

发布时间：2018-03-28 08:37

本文选题：超载运输　切入点：桥梁承载力　出处：《长安大学》2015年硕士论文

【摘要】：超限车辆具有外形尺寸大、总载重量大、单轴载重量大和轮轴数目多等特点,会对沿线的桥梁造成结构损伤。随着超载运输车辆的日益增多,治超管理工作也在不断发展,但仍未提出有效的治理办法。本文开展超载运输车辆对桥梁承载力影响研究,具有重要的理论和实际意义。本文基于专家学者对超载运输车辆及中小跨径桥梁承载能力的研究,依托闻垣高速公路工程,采集超限车辆技术参数,确定典型超限车辆模型,采用等代荷载法和实际荷载验算法验算中小跨径桥梁承载力,同时利用有限元分析软件MIDAS/Civil建立了中小跨径桥梁模型,最后对比分析了典型超限车辆超限荷载效应值与标准荷载效应值。具体工作如下:1.首先论述了超载运输的现状,指出了超载运输对中小跨径桥梁上部结构的危害,查阅了国内外超载运输管理现状,提出研究超载运输对中小跨径桥梁承载力影响的必要性。2.介绍了中小跨径桥梁的承载潜力,提出了桥梁承载力影响因素,最后详细阐述了桥梁承载力的评定方法。3.采集超载运输车辆技术参数,进行统计分析,找出了典型六轴、七轴超限车辆荷载模型。4.选择合适的桥梁承载能力评定方法,利用结构受力原理,验算超限荷载对中小跨径桥梁承载力。5.利用有限元分析软件对中小跨径桥梁进行模拟,并将验算结果进行对比分析,验证了典型超限车辆可以通过中小跨径桥梁的可靠性。6.本文的研究成果对以后建立超限车辆管理系统程序,实现系统化、信息化治超管理,提供了参考价值。
[Abstract]:The overloaded vehicles have the characteristics of large shape size, large total load, large single axle load and large number of wheel shafts, which will cause structural damage to bridges along the route. With the increasing number of overloaded transport vehicles, the management of overloading and overloading is also developing. However, no effective control measures have been put forward. It is of great theoretical and practical significance to study the influence of overloaded transport vehicles on the bearing capacity of bridges. This paper is based on the study of the bearing capacity of overloaded vehicles and small and medium-sized span bridges by experts and scholars. Based on the Wenyuan Expressway project, the technical parameters of the overrun vehicle are collected, the typical overrun vehicle model is determined, and the bearing capacity of the medium and small span bridges is checked by the equivalent load method and the actual load checking method. At the same time, the finite element analysis software MIDAS/Civil is used to establish the bridge model of medium and small span. Finally, the effect value of overloading and the standard load effect of typical over-limit vehicle are compared and analyzed. The specific work is as follows: 1. Firstly, the present situation of overloading transportation is discussed. This paper points out the harm of overload transportation to the superstructure of medium and small span bridges, consults the present situation of overloading transportation management at home and abroad, puts forward the necessity of studying the influence of overload transportation on the bearing capacity of medium and small span bridges, and introduces the bearing potential of medium and small span bridges. The influencing factors of bridge bearing capacity are put forward. Finally, the evaluation method of bridge bearing capacity is expounded in detail. 3. The technical parameters of overloaded transport vehicles are collected and analyzed, and the typical six axes are found out. The model of seven-axis over-limit vehicle load .4.Selects the suitable bridge bearing capacity evaluation method, using the structural stress principle, checks and calculates the overload load to the small and medium-sized span bridge bearing capacity .5.Use the finite element analysis software carries on the simulation to the medium and small span bridge, The results of checking calculation are compared and analyzed to verify the reliability of typical overrun vehicles passing through medium and small span bridges. 6. The research results of this paper establish the program of overrun vehicle management system in the future to realize systematization and information management. It provides reference value.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U441.2

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