钢管混凝土系杆拱桥吊杆张拉控制与优化研究

发布时间：2018-03-18 03:16

本文选题：钢管混凝土拱桥　切入点：施工监控　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：拱桥是一种古老的桥型，曾在我国的桥梁史上写下了光辉的历史。钢管混凝土系杆拱桥为无推力拱桥，外部静定而结构内部高次超静定，其合理的内力状态与理想几何线形不但与设计有关，还要依靠合理、科学的施工方法来实现，为了保证桥梁结构施工安全，达到成桥的设计目标，提高施工质量，需要对施工过程进行全程的监测控制。而系杆拱桥施工阶段吊杆内力的优化调整，将直接影响到钢管混凝土系杆拱桥的成桥状态和使用性能，如何确定不同施工阶段吊杆张拉力才是问题的关键。本文以浙江湖州大钱港大桥的施工监控为工程背景，，应用大型通用有限元软件Midas/Civil建立有限元模型对该桥进行施工阶段分析计算。以系杆拱桥施工阶段索力优化调整为本文主线，结合施工阶段索力优化理论，采用正装迭代法计算大钱港大桥施工阶段四次吊杆张拉的张拉控制力，用该结果指导施工，得出实测索力，将实测值与理论值进行对比分析。并对吊杆张拉过程中的应力、线形进行了监测控制，将实测结果与理论计算结果进行分析比较。结果表明：施工阶段四次吊杆张拉实测值与理论值误差均在10%，实测应力与理论计算值误差均在规范要求范围之内，实测线形良好。采用正装迭代法计算的施工阶段吊杆张拉控制力，能很好地指导施工，使成桥索力与成桥目标索力误差在规范要求的范围之内。本论文在钢管混凝土系杆拱桥施工阶段吊杆张拉力的计算方法及施工控制上进行一些探讨性的研究，研究成果具有一定的参考价值。
[Abstract]:Arch bridge is an ancient bridge type, which has written a glorious history in the history of bridges in our country. Concrete-filled steel tube tied arch bridge is a non-thrust arch bridge. The reasonable internal force state and the ideal geometric alignment are not only related to the design, but also depend on reasonable and scientific construction methods. In order to ensure the construction safety of the bridge structure, to reach the design goal of the completed bridge, and to improve the construction quality, It is necessary to monitor and control the whole construction process, and the optimal adjustment of the internal force of the suspenders in the construction stage of the tied arch bridge will directly affect the bridge state and performance of the concrete-filled steel tubular tied arch bridge. How to determine the tension of suspenders in different construction stages is the key problem. This paper takes the construction monitoring of Daqian Port Bridge in Huzhou, Zhejiang Province as the engineering background. The finite element model of the bridge is established by using the large and universal finite element software Midas/Civil to analyze and calculate the construction stage of the bridge. The main line of this paper is the cable force optimization adjustment in the construction stage of the tied arch bridge, combined with the theory of the cable force optimization in the construction stage. The tension control force of the four suspenders in the construction stage of Da-Qian Gang Bridge is calculated by using the formal iteration method. The measured cable force is obtained by using the result, and the measured value is compared with the theoretical value, and the stress in the tension process of the suspender is analyzed. The line shape is monitored and controlled, and the measured results are analyzed and compared with the theoretical results. The results show that the errors of the measured and theoretical values of the four suspenders in the construction stage are both 10, and the errors of the measured stresses and the theoretical calculated values are within the scope of the specifications. The measured line shape is good. The tension control force of the suspender in the construction stage calculated by the formal iterative method can guide the construction very well. The error of cable force and target cable force is within the range of specification. In this paper, the calculation method and construction control of the tension force of suspension rod in the construction stage of concrete-filled steel tubular tied arch bridge are studied. The research results have certain reference value.
【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】：U448.225

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