桁式组合拱桥病害机理分析与研究
发布时间：2018-12-29 18:36
【摘要】：近年来，，随着我国交通事业的发展，桥梁已在经济建设中发挥着越来越重要的作用。而混凝土桁式组合拱桥以其受力合理，用料省，自重轻，施工工序少等优点在我国迅速发展起来。但是由于在此类桥梁的设计、施工和检查、检测方面存在一系列的问题，致使已建成的混凝土桁式组合拱桥出现了很多病害。对于已建成的混凝土桁式组合拱桥进行科学的病害调查与检测，对桥梁结构和运营现状进行分析，具有十分重要的意义。 本文首先调查国内外大量混凝土桁式组合拱桥的现状，总结归纳出该桥型病害特征。然后以河北某大桥为背景，运用Midas Civil2012有限元程序建立模型，通过分析恒载、活载和收缩徐变下桁式组合拱桥与普通桁架拱桥各自的受力特点，得出桁式组合拱桥的特点。最后对该大桥的运营现状进行研究，重点对该桥的外观、混凝土强度、桥面线形进行试验测量，详细阐述了各个试验的原理、过程，并对试验结果进行分析，确定该桥的使用现状。 通过调查分析发现，桁式组合拱桥的病害主要存在于空、实腹交接段和双竖杆附近的下弦杆处。造成这些病害的原因除了有设计、施工、后期养护、超重车辆作用等方面的原因外，该桥型结构方面的缺陷也是不可忽视的原因。通过对河北某大桥的分析与试验检测，发现该桥总体运营状况良好，原有的病害情况无大的发展。并结合该桥的试验资料，对桁式组合拱桥在使用过程中的加固养护，给出一些有益的建议，供后期的桥梁管理工作使用。
[Abstract]:In recent years, with the development of China's transportation industry, bridges have played an increasingly important role in economic construction. The concrete truss arch bridge has developed rapidly in our country with the advantages of reasonable force, less material, light weight and less construction procedure. However, because of a series of problems in the design, construction, inspection and inspection of this kind of bridges, there are many diseases in the concrete truss arch bridge. It is of great significance to investigate and detect the defects of the concrete truss arch bridge, and to analyze the structure and operation status of the bridge. This paper firstly investigates the present situation of a large number of concrete truss arch bridges at home and abroad, and sums up the characteristics of the bridge type diseases. Then based on a bridge in Hebei province, a finite element model is established by using Midas Civil2012 program. The characteristics of truss composite arch bridge are obtained by analyzing the stress characteristics of truss composite arch bridge and common truss arch bridge under dead load, live load and shrinkage and creep. Finally, the operation status of the bridge is studied, with emphasis on the test measurement of the bridge appearance, concrete strength and the line shape of the bridge deck. The principle and process of each test are described in detail, and the test results are analyzed. Determine the current use of the bridge. Through investigation and analysis, it is found that the main diseases of truss arch bridge are at the bottom chord near the hollow, the solid section and the double vertical pole. In addition to the design, construction, later maintenance and overweight vehicle function, the defects of the bridge structure can not be ignored. Through the analysis and test of a bridge in Hebei province, it is found that the overall operation condition of the bridge is good, and the original disease situation has no great development. Based on the experimental data of the bridge, some useful suggestions are given for the bridge management in the later stage.
【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】：U445.7
本文编号：2395224
[Abstract]:In recent years, with the development of China's transportation industry, bridges have played an increasingly important role in economic construction. The concrete truss arch bridge has developed rapidly in our country with the advantages of reasonable force, less material, light weight and less construction procedure. However, because of a series of problems in the design, construction, inspection and inspection of this kind of bridges, there are many diseases in the concrete truss arch bridge. It is of great significance to investigate and detect the defects of the concrete truss arch bridge, and to analyze the structure and operation status of the bridge. This paper firstly investigates the present situation of a large number of concrete truss arch bridges at home and abroad, and sums up the characteristics of the bridge type diseases. Then based on a bridge in Hebei province, a finite element model is established by using Midas Civil2012 program. The characteristics of truss composite arch bridge are obtained by analyzing the stress characteristics of truss composite arch bridge and common truss arch bridge under dead load, live load and shrinkage and creep. Finally, the operation status of the bridge is studied, with emphasis on the test measurement of the bridge appearance, concrete strength and the line shape of the bridge deck. The principle and process of each test are described in detail, and the test results are analyzed. Determine the current use of the bridge. Through investigation and analysis, it is found that the main diseases of truss arch bridge are at the bottom chord near the hollow, the solid section and the double vertical pole. In addition to the design, construction, later maintenance and overweight vehicle function, the defects of the bridge structure can not be ignored. Through the analysis and test of a bridge in Hebei province, it is found that the overall operation condition of the bridge is good, and the original disease situation has no great development. Based on the experimental data of the bridge, some useful suggestions are given for the bridge management in the later stage.
【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】：U445.7
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本文编号：2395224
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