钢管混凝土拱桥竖向转体施工控制仿真分析
发布时间：2018-11-26 10:42
【摘要】：自上世纪九十年代以来，在我国，钢管混凝土拱桥取得了迅猛地发展。伴随着钢管混凝土拱桥跨径的增大以及数量的增多，我国钢管混凝土拱桥在施工技术上已达到一定的水平，然而相对于相对滞后的理论研究，国内目前尚没有钢管混凝土拱桥统一完善的施工技术规范，以至于钢管混凝土拱桥施工往往是无章可循，尤其是对于管内混凝土施工的模拟仿真计算方面缺乏深入的研究。因此研究该阶段结构仿真模拟不仅是钢管混凝土拱桥理论发展的需要，更是工程界的迫切要求。 对于桥梁转体施工，它是一种无需支架的施工方法，在通过山谷、大河以及跨越既有线等方面，具有相当优越的能力。对于早期转体施工技术，主要用于在山区建设跨越山谷或河流的桥梁，并且多是拱桥。 本文依托河北省交通运输厅科技项目《超宽大跨钢管混凝土提篮拱施工监控关键技术研究》，以河北省张石高速滹沱河特大桥为依托工程，主要研究内容为： (1)详细阐述了钢管提篮拱桥转体施工控制的工作原理、施工工艺的特点、转体施工的关键技术以及适用范围。 (2)根据实际施工情况建立施工过程模拟的空间有限元模型，进行钢管混凝土拱桥转体施工过程仿真分析，分析转体施工过程中结构的受力性能，，预测施工过程中的应力和变形的发展情况，并为实际工程施工控制提供理论依据和指导。 (3)为了保证滹沱河特大桥最终的成桥线形以及受力状态能够满足设计要求，由此对其建立了实时监控系统。通过钢管混凝土拱桥的转体施工过程的模拟分析计算，将仿真模型计算结果与现场实际监测数据进行比较分析，仿真模型计算的理论值与实际监测结果吻合较好，这反映了本文所采用的有限元分析方法，能够较好的反映了转体施工实际。转体施工控制仿真分析对滤沱河大桥施工监控能起到较好的指导作用。
[Abstract]:Since 1990's, concrete filled steel tubular arch bridges have developed rapidly in China. With the increase of span and quantity of CFST arch bridge, the construction technology of CFST arch bridge in China has reached a certain level, but the theoretical research is relatively lagging behind. At present, there is no unified construction technical code for concrete-filled steel tube arch bridge, so that the construction of concrete filled steel tube arch bridge is often without rules to follow, especially for the concrete in pipe construction simulation and simulation of the lack of in-depth research. Therefore, it is not only the need of theoretical development of CFST arch bridge, but also the urgent requirement of engineering field to study the simulation of structure in this stage. For bridge construction, it is a kind of construction method without support, and it has the superior ability to pass through valleys, rivers and cross existing lines. For the early turning construction technology, it is mainly used to build bridges across valleys or rivers in mountainous areas, and most of them are arch bridges. This paper relies on the scientific and technological project of Hebei Provincial Communications and Transportation Department, "Research on the key technology of construction monitoring of super large span concrete filled steel tube hoist arch", and takes Zhangshi High Speed Hutuo River Bridge in Hebei Province as the backing project. The main research contents are as follows: (1) the working principle, the characteristics of the construction technology, the key technology and the applicable scope of the rotary construction of the steel pipe hoist arch bridge are expounded in detail. (2) according to the actual construction conditions, the spatial finite element model of the construction process simulation is established, and the simulation analysis of the construction process of the concrete-filled steel tubular arch bridge is carried out, and the mechanical performance of the structure during the rotating construction process is analyzed. The development of stress and deformation in construction process is predicted, and the theoretical basis and guidance for practical engineering construction control are provided. (3) in order to ensure that the final shape and force state of Hutuo River Bridge can meet the design requirements, a real-time monitoring system is established for the Hutuo River Bridge. Through the simulation analysis and calculation of the rotating construction process of the concrete-filled steel tube arch bridge, the results of the simulation model calculation are compared with the actual monitoring data. The theoretical value of the simulation model calculation is in good agreement with the actual monitoring result. This reflects the finite element analysis method adopted in this paper, and can better reflect the practice of rotary construction. Simulation analysis of rotary construction control can play a good guiding role in construction monitoring of Zhuantuo River Bridge.
【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】：U445.4
本文编号：2358332
[Abstract]:Since 1990's, concrete filled steel tubular arch bridges have developed rapidly in China. With the increase of span and quantity of CFST arch bridge, the construction technology of CFST arch bridge in China has reached a certain level, but the theoretical research is relatively lagging behind. At present, there is no unified construction technical code for concrete-filled steel tube arch bridge, so that the construction of concrete filled steel tube arch bridge is often without rules to follow, especially for the concrete in pipe construction simulation and simulation of the lack of in-depth research. Therefore, it is not only the need of theoretical development of CFST arch bridge, but also the urgent requirement of engineering field to study the simulation of structure in this stage. For bridge construction, it is a kind of construction method without support, and it has the superior ability to pass through valleys, rivers and cross existing lines. For the early turning construction technology, it is mainly used to build bridges across valleys or rivers in mountainous areas, and most of them are arch bridges. This paper relies on the scientific and technological project of Hebei Provincial Communications and Transportation Department, "Research on the key technology of construction monitoring of super large span concrete filled steel tube hoist arch", and takes Zhangshi High Speed Hutuo River Bridge in Hebei Province as the backing project. The main research contents are as follows: (1) the working principle, the characteristics of the construction technology, the key technology and the applicable scope of the rotary construction of the steel pipe hoist arch bridge are expounded in detail. (2) according to the actual construction conditions, the spatial finite element model of the construction process simulation is established, and the simulation analysis of the construction process of the concrete-filled steel tubular arch bridge is carried out, and the mechanical performance of the structure during the rotating construction process is analyzed. The development of stress and deformation in construction process is predicted, and the theoretical basis and guidance for practical engineering construction control are provided. (3) in order to ensure that the final shape and force state of Hutuo River Bridge can meet the design requirements, a real-time monitoring system is established for the Hutuo River Bridge. Through the simulation analysis and calculation of the rotating construction process of the concrete-filled steel tube arch bridge, the results of the simulation model calculation are compared with the actual monitoring data. The theoretical value of the simulation model calculation is in good agreement with the actual monitoring result. This reflects the finite element analysis method adopted in this paper, and can better reflect the practice of rotary construction. Simulation analysis of rotary construction control can play a good guiding role in construction monitoring of Zhuantuo River Bridge.
【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】：U445.4
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