滹沱河特大桥安全跟踪评估系统研究

发布时间：2018-02-16 00:16

本文关键词： 钢管混凝土拱桥评估方法评估系统权重评语　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：钢管混凝土拱桥近些年来在我国交通领域发展受到了越来越多桥梁设计师的青睐。这不仅仅是因为它的造型优美，还有诸多其它方面的优点，目前它在交通领域占据了重要地位。钢管混凝土拱桥伴随运营时间的增长，桥梁自身构件或多或少的出现了病害，这些病害如果不能及时发现，病害继而扩展就有可能引起重大的工程事故。目前，国外很多的大型桥梁都建立了比较完善的健康监测系统，而在国内交通行业大发展的背景下，行业人员也很重视桥梁的健康检测，并且越来越多的实践到了一些大型桥梁上。这种系统能够比较及时、有效的发现桥梁结构的病害，并且针对损害状况迅速的做出相应处治措施。本文将以一座大跨径钢管混凝土拱桥为依托工程，研究分析了钢管混凝土拱桥健康监测方面的几个问题。主要的研究工作及成果包括如下几个方面：（1）钢管混凝土拱桥基于综合评估法的安全跟踪评估方法。从钢管混凝土拱桥运营状态健康监测的内容，常见的评估方法，以及桥梁自身结构受力特点，优选出基于综合评估法的安全跟踪评估方法合适的健康监测方案，着重介绍了层次分析法和变权原理；（2）钢管混凝土拱桥安全跟踪评估系统的建立。从评估系统系统设计准则出发，选出钢管混凝土拱桥的评估项目，完成评估测点的布设，简述评估数据的采集，以及评估的准则。（3）以滹沱河特大桥工程实例建立安全跟踪评估系统。从桥梁结构的几何形态布设，桥梁结构应力测试截面及测点布设，拱座和主墩、系梁应变计的埋设及布置，主、边拱肋和横撑应变计的埋设及布置，外包段、立柱和纵横梁应变计的埋设及布置，以及吊杆应力状态监测等方面详细介绍监测系统的建立要点，以及后期的数据采集。具体的示范了安全跟踪评估系统的建立。（4）滹沱河特大桥安全评估计算分析。在滹沱河特大桥安全跟踪评估中，经过结构层次体系的划分及建立、并确定各个层次的初始权重，，以及监测测点权重值的计算；又从大桥的应力指标评语、拱体系截面测点评语、吊杆索力评语、结构几何形态参数指标评语四方面进行指标层评语的确定后。进行变权综合法评估计算，得出滹沱河特大桥结构等级为一类的结论。
[Abstract]:In recent years, concrete-filled steel tubular arch bridges have attracted more and more attention from bridge designers in the field of transportation in China. This is not only because of its beautiful shape, but also because of its many other advantages. At present, it occupies an important position in the field of transportation. With the increase of operation time of CFST arch bridge, there are more or less defects of its own components, if these diseases can not be found in time, At present, many large bridges in foreign countries have established relatively perfect health monitoring systems, and in the context of the great development of the domestic transportation industry, Industry personnel also attach great importance to bridge health detection, and more and more practice on some large bridges. This system can be relatively timely, effective detection of bridge structure diseases, And to deal with the damage quickly, this paper will rely on a long-span concrete-filled steel tube arch bridge. Several problems in health monitoring of concrete-filled steel tubular arch bridge are studied and analyzed. The main research work and results include the following aspects:. 1) the safety tracking evaluation method of CFST arch bridge based on comprehensive evaluation method. The contents of health monitoring of CFST arch bridge, the common evaluation methods, and the structural characteristics of the bridge are discussed. The suitable health monitoring scheme based on comprehensive assessment method is selected, and the analytic hierarchy process (AHP) and the principle of variable weight are emphatically introduced. Based on the design criteria of the evaluation system, the evaluation project of the concrete filled steel tubular arch bridge is selected, and the layout of the evaluation measuring points is completed. The collection of the evaluation data and the evaluation criteria are briefly described. The safety tracking and evaluation system is established with the example of Hutuo River Bridge Project. From the geometric configuration of the bridge structure, the layout of the stress test section and measuring points of the bridge structure, the embedding and arrangement of the arch seat and the main pier, the strain gauge of the tie beam, the main, The installation and arrangement of the side arch rib and transverse bracing strain gauge, the outlay section, the embedding and arrangement of the vertical and horizontal beam strain gauge, and the monitoring of the stress state of the suspender are introduced in detail, and the main points of establishing the monitoring system are introduced in detail. And later data acquisition. The concrete demonstration of the establishment of a security tracking and evaluation system. 4) calculation and analysis of safety assessment of Hutuo River Bridge. In the safety tracking evaluation of Hutuo River Bridge, the structure hierarchy system is divided and established, the initial weight of each level is determined, and the weight value of monitoring point is calculated. After the evaluation of the stress index of the bridge, the evaluation of the section of the arch system, the evaluation of the cable force of the hoisting rod and the evaluation of the index of the geometric and morphological parameters of the structure, the evaluation calculation of the index layer is carried out by using the variable weight synthesis method. It is concluded that the structure grade of Hutuo River Bridge is one class.
【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】：U447

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