高速铁路预应力混凝土连续梁桥施工分析

发布时间：2018-05-20 16:08

本文选题：高速铁路连续梁桥 + 施工分析　；参考：《重庆交通大学》2015年硕士论文

【摘要】：随着高强度材料和悬臂灌注等施工工艺逐渐广泛地运用于桥梁建设领域,预应力混凝土连续梁桥成为普遍常见的桥梁类型。尤其是其行车平稳舒适,抗震强度高等优点,在越来越多的高速铁路建设中,成为普遍采用的桥梁形式。随着桥梁分析软件的运用,通过仿真模型的建立,可以得出实际桥梁结构在不同施工阶段的内力和挠度等重要参数。但是,在桥梁施工过程中,会因为各种因素的影响,使得实际数值与理论结果存在差异,这时就需要采用线形和应力等控制手段,让最终的成桥状态满足要求。本文结合一条在建的高速铁路连续梁桥,运用MIDAS Civil和MIDAS FEA桥梁分析软件,对桥梁进行整体和局部分析,得出相应结论,并将之用来指导具体的施工过程。论文包含以下内容:①介绍高速铁路连续梁桥的发展史、桥型特征,高速铁路连续梁桥施工分析理论的研究现状、基本内容,以及高速铁路连续梁桥与公路连续梁桥的差异;②针对具体的工程实例,对整个桥梁的施工阶段进行仿真分析,考虑不同荷载的组合作用,得出关键施工阶段和关键截面的内力和挠度,并与建设过程中的实际测量数据进行比较分析,对桥梁施工中的线形和应力实施控制。③分别对零号块和挂篮结构进行局部分析,验算零号块在最大悬臂阶段的内力、阐述零号块常见的裂缝形态、成因,以及计算挂篮在不同荷载组合作用下的强度、刚度和稳定性。论文得出如下结论:①高铁连续梁桥与公路连续梁桥在材料用量、截面尺寸和结构刚度等方面存在差异;②运用仿真模型模拟连续梁桥的不同施工阶段,得出的数据满足强度、刚度、稳定的要求,并对整个施工过程的线形和应力控制具有很好的指导作用;③运用仿真模型模拟零号块,验算出该梁段在实际施工过程中的受力能满足要求,并且提出了零号块不同裂缝病害的处理方法;④建立挂篮结构的仿真模型,考虑不同荷载组合的影响,各部件的强度、刚度和稳定性均能满足所有要求。
[Abstract]:With the application of high strength material and cantilever pouring technology in the field of bridge construction, prestressed concrete continuous beam bridge has become a common type of bridge. Especially, it has the advantages of smooth and comfortable driving, high seismic intensity and so on. It has become a widely used bridge form in the construction of more and more high-speed railway. With the application of bridge analysis software and the establishment of simulation model, important parameters such as internal force and deflection of actual bridge structure in different construction stages can be obtained. However, in the process of bridge construction, due to the influence of various factors, there are differences between the actual value and the theoretical results. At this time, it is necessary to use linear and stress control methods to make the final state of the bridge meet the requirements. Combined with a continuous beam bridge of high speed railway under construction, the whole and local analysis of the bridge is carried out by using MIDAS Civil and MIDAS FEA bridge analysis software, and the corresponding conclusions are drawn and used to guide the concrete construction process. The paper includes the following contents: 1. Introduce the history of the high-speed railway continuous beam bridge, the bridge type characteristics, the research status quo of the high-speed railway continuous beam bridge construction analysis theory, the basic content, and the difference between the high-speed railway continuous beam bridge and the highway continuous beam bridge. 2 according to the concrete engineering example, the whole bridge construction stage is simulated and analyzed, considering the combination of different loads, the internal force and deflection of the key construction stage and the key section are obtained. And compared with the actual measurement data in the construction process, the linear shape and stress of the bridge construction are controlled by .3 to analyze the zero block and the hanging basket structure, respectively, and to check the internal force of the zero block in the maximum cantilever stage. This paper expounds the common crack form and causes of the zero block, and calculates the strength, stiffness and stability of the hanging basket under different load combinations. The conclusions are as follows: (1) there are differences in material consumption, cross-section size and structural stiffness between continuous beam bridge and highway continuous beam bridge. Secondly, the simulation model is used to simulate the different construction stages of continuous beam bridge, and the obtained data meet the intensity. The requirements of stiffness and stability, and the linear and stress control of the whole construction process have a good guidance role. The simulation model is used to simulate the zero block, and it is verified that the stress of the beam section in the actual construction process can meet the requirements. The method to deal with different crack diseases in block zero is put forward. The simulation model of hanging basket structure is established. Considering the influence of different load combinations, the strength, stiffness and stability of each component can meet all the requirements.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4

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