下承式钢管混凝土系杆拱桥施工监控技术研究

发布时间：2018-01-16 21:18

本文关键词：下承式钢管混凝土系杆拱桥施工监控技术研究　出处：《合肥工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：钢管混凝土拱桥因其受力性能良好、施工方便、造型美观和抗震性好等优点在工程中得到了广泛地应用。同时，钢管混凝土拱桥的施工方法得到了很大的改善和发展，施工监控得到广泛的重视和提高。本文结合目前国内外钢管混凝土拱桥的发展情况，在总结国内外钢管混凝土拱桥施工和监控的基础上，以临安双塔大桥为工程背景，对钢管混凝土拱桥的施工工艺和监控进行较为全面的分析研究。全文完成了以下主要工作: 1、介绍了临安双塔大桥施工技术以及施工控制的方案和内容，同时以系杆拱桥施工过程中的内力、线形和吊杆张拉力为控制目标，建立了双塔大桥的施工控制体系。 2、双塔大桥施工过程的仿真计算与分析。运用有限元软件Midas/Civil建立全桥模型，对双塔大桥的施工过程进行仿真模拟，了解整个施工过程中全桥的受力和变形情况，为施工监控提供理论依据以及指导施工。 3、系杆拱桥施工中吊杆张拉的施工控制与优化。借助有限元软件的理论计算，确定吊杆的初始张拉力，另外，利用影响矩阵法对吊杆张拉力进行优化，通过对吊杆的二次张拉与优化，使得在最终成桥状态下全部吊杆力符合设计要求。 4、拱脚节点空间应力分析，运用大型通用有限元软件ANSYS对双塔大桥的拱脚局部进行建模分析，掌握拱脚在全桥施工过程中的受力特性，为施工监控提供理论依据和指导。 5、对双塔大桥的系梁、拱肋的应力和线形以及吊杆索力进行监测和控制，将理论计算值与实测值进行对比分析，保证误差控制在设计范围以内，结果证实了大桥在施工过程中的受力满足设计要求，，监控达到了预期的目标。
[Abstract]:Concrete-filled steel tubular arch bridge has been widely used in engineering because of its good mechanical performance, easy construction, beautiful shape and good seismic resistance. The construction method of CFST arch bridge has been greatly improved and developed, and construction monitoring has been widely paid attention to and enhanced. This paper combines the development of CFST arch bridge at home and abroad. On the basis of summing up the construction and monitoring of concrete-filled steel tube arch bridge at home and abroad, taking the double tower bridge in Lin'an as the engineering background. The construction technology and monitoring of concrete-filled steel tubular arch bridge are analyzed and studied comprehensively. 1. This paper introduces the construction technology, construction control scheme and content of Linan double-tower bridge. At the same time, it takes the internal force, linear shape and tension of suspenders as the control target during the construction of tied arch bridge. The construction control system of double tower bridge is established. 2, the simulation calculation and analysis of the construction process of the double-tower bridge. Using the finite element software Midas/Civil to establish the full-bridge model, the construction process of the double-tower bridge is simulated. To understand the stress and deformation of the whole bridge during the whole construction process, to provide theoretical basis and guide construction for construction monitoring. 3, the construction control and optimization of the suspender tensioning in the construction of tied arch bridge. With the help of the theoretical calculation of finite element software, the initial tension of the suspender is determined. In addition, the influence matrix method is used to optimize the tension of the suspender. Through the secondary tension and optimization of the suspension rod, all the suspender forces meet the design requirements in the final state of the bridge. 4. The spatial stress of arch joint is analyzed, and the local model of double tower bridge is modeled and analyzed by using the large scale finite element software ANSYS, and the mechanical characteristics of arch foot in the whole bridge construction process are grasped. To provide theoretical basis and guidance for construction monitoring. 5. Monitoring and controlling the stress and line shape of the tie beam and arch rib of the double tower bridge as well as the cable force of the suspender, and comparing the theoretical calculation value with the measured value to ensure that the error is controlled within the design range. The results show that the stress of the bridge in the construction process meets the design requirements, and the monitoring achieves the expected goal.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.225

【参考文献】