钢管混凝土预应力斜拉桥仿真模拟与施工控制研究

发布时间：2018-06-24 08:05

本文选题：斜拉桥 + 仿真计算　；参考：《长安大学》2014年硕士论文

【摘要】：随着材料科学的发展，结构计算方法和分析手段的进步，以及施工方法和工艺的创新，斜拉桥在二十世纪九十年代迅速兴起。如今，斜拉桥已经成为桥梁建设中不可或缺的一种桥型。然而斜拉桥属于高次超静定的柔性结构，施工过程与成桥状态具有极强的相关性，必然给桥梁结构带来复杂的内力变化，这些特点使得斜拉桥的施工控制分析成为重要的研究课题。本文在学习和总结前人研究工作的基础上，以榆林市朝阳大桥为工程背景，并根据设定好的施工工序对该桥施工过程进行了全过程仿真计算，提出了针对该桥的主要控制参数。并在仿真结果的基础之上对该桥的各阶段施工进行了跟踪实测。将施工实测参数与计算理论值进行了对比，对施工过程中的主要控制参数进行了指导。论文首先是总结了国内外斜拉桥的发展史；斜拉桥目前的施工控制现状。在阅读了大量文献后，总结出斜拉桥施工控制的定义、任务以及内容，指出了斜拉桥施工控制的首要问题就是对全桥进行仿真计算。为使仿真计算的结果更为准确合理，在仿真计算中需要考虑影响桥梁施工控制的诸多因素。因此，论文对影响桥梁施工控制的因素进行了探讨，并且就斜拉桥施工控制常用的两种结构分析方法（正装、反装）进行了讨论。在明确了施工控制计算方法后，讨论了斜拉桥各个构件在施工控制仿真分析过程中的模拟方法。利用这些分析方法，针对朝阳大桥，采用桥梁工程软件MIDAS-CIVIL，对其建立三维模型，，进行整个施工过程模拟计算分析。在施工控制仿真计算分析中，针对该桥的施工特点建立了合理的仿真计算模型，即在模拟斜拉桥支架施工时可采用只受压单元进行模拟，钢管混凝土桥塔可以采用联合截面的方法进行模拟。采用这种方法可以更为真实的模拟出该部分桥梁构件的实际状态。并对施工控制仿真计算结果进行了详细分析；最后通过施工控制实测与监测结果和成桥后荷载试验结果进一步验证了施工控制的方法和工艺是合理的，可实现的，同时又是简单易行的，也是可以推广的；也充分证明本文所采用的计算方法的准确性及合理性。该研究结果对同类斜拉桥施工控制具有的参考作用。
[Abstract]:With the development of material science, the progress of structural calculation method and analysis method, and the innovation of construction method and technology, cable-stayed bridge rises rapidly in 1990s. Nowadays, cable-stayed bridge has become an indispensable bridge type in bridge construction. However, cable-stayed bridge is a kind of flexible structure with high degree of statically indeterminate, and the construction process has a strong correlation with the state of the completed bridge, which will inevitably bring complex internal force changes to the bridge structure. These characteristics make the construction control analysis of cable-stayed bridge become an important research topic. On the basis of studying and summarizing the previous research work, taking the Chaoyang Bridge in Yulin City as the engineering background, and according to the established construction procedure, the whole process simulation calculation of the bridge construction process is carried out, and the main control parameters of the bridge are put forward. On the basis of the simulation results, the construction of the bridge in various stages has been tracked and measured. The measured construction parameters are compared with the calculated theoretical values, and the main control parameters in the construction process are guided. Firstly, the paper summarizes the development history of cable-stayed bridges at home and abroad, and the current construction control status of cable-stayed bridges. After reading a lot of literature, the paper summarizes the definition, task and content of construction control of cable-stayed bridge, and points out that the most important problem of construction control of cable-stayed bridge is to simulate the whole bridge. In order to make the simulation results more accurate and reasonable, many factors affecting the bridge construction control should be considered in the simulation calculation. Therefore, the paper discusses the factors that affect the bridge construction control, and discusses two common structural analysis methods (formal, reverse) for cable-stayed bridge construction control. After defining the calculation method of construction control, the simulation method of each component of cable-stayed bridge in the process of construction control simulation analysis is discussed. By using these analysis methods, the 3D model of Chaoyang Bridge is built by using the bridge engineering software MIDAS-CIVIL.The whole construction process is simulated and analyzed. In the construction control simulation calculation and analysis, according to the construction characteristics of the bridge, a reasonable simulation calculation model is established, that is, only the compression unit can be used to simulate the construction of the cable-stayed bridge support. Concrete-filled steel tubular (CFST) bridge tower can be simulated by the method of joint section. This method can be used to simulate the actual state of this part of the bridge component more realistically. The simulation calculation results of construction control are analyzed in detail. Finally, the method and technology of construction control are proved to be reasonable and feasible through the measured and monitoring results of construction control and the results of post-bridge load test. At the same time, it is simple and easy to use, and can be popularized, and the accuracy and reasonableness of the calculation method used in this paper are fully proved. The results are useful for the construction control of similar cable-stayed bridges.
【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】：U448.27

【参考文献】