某钢筋混凝土拱桥结构损伤分析与评价

发布时间：2018-06-13 06:57

本文选题：钢筋混凝土拱桥 + 损伤分析与检测　；参考：《河北工程大学》2017年硕士论文

【摘要】：建国以来,我国桥梁建造技术不断发展,钢筋混凝土拱桥被普遍建设于城市之中。但是随着使用时间的增加,交通运输量的增长,很多早期建成的桥梁出现了各种各样的结构损伤,这些问题如果不解决,会严重威胁人类的生命财产安全。因此,定期对旧桥进行健康检测是十分必要的。为了更加科学合理的对旧桥进行养护及维修加固,本文针对钢筋混凝土拱桥结构损伤状况,建立了一套系统的、能够反映桥梁结构损伤状况的评价体系。主要工作如下:1、分析了钢筋混凝土拱桥损伤现状,在总结国内外拱桥损伤研究的基础上,从多个方面分析了钢筋混凝土拱桥结构损伤的影响因素及病害机理。2、确定指标体系的构成因素,创建评价指标体系。3、依据模糊综合评价原理,结合层次分析法与最大熵值法的利弊,在利用综合赋权法分析各个指标因素权重的基础上,建立钢筋混凝土拱桥结构损伤状况模糊综合评价模型。4、针对某钢筋混凝土拱桥主拱结构,按照规范要求,对其做了大量的检测与试验工作,包括外观检测,无损检测,静载试验与动载试验,对得出数据进行分析处理。并借助于该桥损伤试验数据,基于本文建立的模糊综合评价模型,对桥梁主拱结构损伤状况进行模糊综合评价。实例表明建立的模型能够有效地评价钢筋混凝土拱桥结构损伤状况,一方面可以对已有的钢筋混凝土桥梁结构损伤进行科学的分析评定,以便采取正确的处理措施,为今后的桥梁建设、维修及加固提供科学依据。另一方面可以对新建项目进行更合理的设计,分析桥梁结构损伤的影响因素,从而提高工程的设计水平、施工质量和加固养护管理水平。可见,结构的损伤分析与评价具有极大的经济效益和社会效益,同时,既有服务于现役结构加固的现实意义,又有指导待建结构设计的理论意义。
[Abstract]:Since the founding of the people's Republic of China, the construction technology of bridges in China has been continuously developed, and reinforced concrete arch bridges have been widely built in cities. However, with the increase of service time and the increase of traffic volume, many bridges built in the early period have been damaged by various structures. If these problems are not solved, the safety of human life and property will be seriously threatened. Therefore, it is necessary to check the health of the old bridge regularly. In order to maintain and maintain the old bridge more scientifically and reasonably, this paper establishes a set of evaluation system which can reflect the damage condition of the bridge structure according to the damage condition of reinforced concrete arch bridge. The main work is as follows: 1. The damage status of reinforced concrete arch bridge is analyzed. On the basis of summarizing the research of arch bridge damage at home and abroad, In this paper, the influencing factors and damage mechanism of reinforced concrete arch bridge structure are analyzed from many aspects, and the composing factors of index system are determined, and the evaluation index system. 3. According to the fuzzy comprehensive evaluation principle, the paper analyses the damage factors of reinforced concrete arch bridge structure and the damage mechanism of reinforced concrete arch bridge. Combining the advantages and disadvantages of Analytic hierarchy process (AHP) and maximum entropy method, the weight of each index factor is analyzed by comprehensive weighting method. A fuzzy comprehensive evaluation model of reinforced concrete arch bridge structure damage is established. According to the specifications, a lot of testing and testing work has been done for the main arch structure of a reinforced concrete arch bridge, including appearance inspection and nondestructive testing. Static load test and dynamic load test, the obtained data are analyzed and processed. With the help of the bridge damage test data and based on the fuzzy comprehensive evaluation model established in this paper, the damage condition of the main arch structure of the bridge is evaluated by fuzzy comprehensive evaluation. The example shows that the model can effectively evaluate the structural damage of reinforced concrete arch bridge. On the one hand, the damage of existing reinforced concrete bridge can be scientifically analyzed and evaluated in order to take correct treatment measures. It provides scientific basis for future bridge construction, maintenance and reinforcement. On the other hand, the new project can be designed more reasonably, and the influencing factors of bridge structure damage can be analyzed so as to improve the engineering design level, construction quality and management level of reinforcement and maintenance. It can be seen that the damage analysis and evaluation of the structure has great economic and social benefits, at the same time, it not only serves the practical significance of the reinforcement of the active structure, but also has the theoretical significance of guiding the design of the structure to be built.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U441.4;U448.22

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