大件运输条件下公路石拱涵的结构稳定性研究

发布时间：2018-01-11 06:08

本文关键词：大件运输条件下公路石拱涵的结构稳定性研究　出处：《重庆交通大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着我国经济建设和科学技术的不断发展和进步，大件运输作为一个快速发展的行业，，成为支撑国家重大工程项目的关键环节。而大件设备由于超重、超高及超宽等特殊性，很容易受到道路的实际条件及交通管理部门的限制，因此许多大件运输工作的开展并不顺畅。本论文以贵州习水二郎电厂的大型发电机运输前期勘察和预估为背景依托，对该项目中习水至草莲坝道路段上的三座石拱涵在大件重载运输条件下的结构稳定性进行针对性的分析研究，并通过计算机程序编程对石拱涵的结构稳定性进行安全性评价，最后利用有限元分析来精确地判断验算方法的准确性和可靠性。首先，通过阅读和学习大量国内外相关的文献资料，了解大件运输的发展现状、大件运输的特点以及大件运输荷载与普通荷载的区别。其次，有针对性的对大件荷载运输车辆进行重载分析，同时结合石拱涵的基本结构特点、受力分析及计算方法，对大件运输条件下石拱涵的结构稳定性进行理论验算和分析。再次，在理论研究的基础上，利用计算机编程软件VB对石拱涵的结构稳定性验算进行编程，得到一个在大件运输条件下石拱涵结构验算的应用程序，通过此程序的验算可以对大件运输条件下石拱涵的结构稳定性进行安全性评价，为大件运输条件下道路的安全通过性评价系统提供重要的参考依据。然后，根据现有大件运输条件下石拱涵的结构稳定性验算方法和经验，以该项目背景为依托，选取该段路中某一典型尺寸的石拱涵，对其结构稳定性分别进行手工验算和程序验算，并用两种算法的结果进行对比分析。最后，通过使用结构有限元分析软件对该石拱涵建立结构有限元模型，在模型中加载该项目中的大件重载货物，通过迈达斯桥梁结构分析和设计软件对其进行结构受力分析，判断石拱涵在该大件重载条件下的结构稳定性，从而确定上诉理论验算方法和程序验算方法的准确性和可靠性。
[Abstract]:With the development and progress of our country ' s economic construction and science and technology , the transportation of heavy goods as a rapidly developing industry has become the key link in supporting the country ' s major projects . First , through reading and learning a large number of relevant literatures , we know the present situation of transportation , the characteristics of large part transportation and the difference between heavy transportation load and common load . Secondly , carrying out heavy load analysis on heavy load transportation vehicles , combining the basic structural characteristics , stress analysis and calculation methods of the stone arch culvert , and carrying out theoretical calculation and analysis on the structural stability of the stone arch culvert under the transportation condition of the large part . Thirdly , on the basis of the theory research , the structural stability of the stone arch culvert is programmed with the computer programming software VB , and an application program for checking the structure stability of the stone arch culvert under the condition of large part transportation is obtained . The safety evaluation of the structural stability of the stone arch culvert under the transportation condition of the large part can be carried out by the checking calculation of the program , and the important reference basis for the safety passing performance evaluation system of the road under the transportation condition of the large part can be provided . Then , according to the calculation method and experience of the structural stability of the stone arch culvert under the existing large - piece transportation condition , based on the background of the project , the stone arch culvert of some typical dimension in the section is selected , the structural stability of the stone arch culvert is calculated manually and the program is verified , and the results of the two algorithms are compared and analyzed . Finally , by using the structural finite element analysis software to construct the finite element model of the stone arch culvert , the heavy load goods in the project are loaded in the model , and the structural stability of the stone arch culvert under the heavy load condition is determined through the analysis of the bridge structure and the design software , so that the accuracy and the reliability of the trial calculation method and the program checking method of the appeals theory are determined .

【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U449

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