钢管混凝土系杆拱桥施工监控的研究

发布时间：2018-03-13 13:08

本文选题：钢管混凝土系杆拱桥　切入点：施工监控　出处：《湖北工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：在拱桥的发展历程中，钢管混凝土系杆拱桥以梁拱组合体系，发挥自身拱受压、梁受弯的结构性能，，很好的解决了拱桥在材料自重大、施工困难和跨度之间的矛盾，从而得到迅速发展。钢管混凝土系杆拱桥属于外部静定，内部超高次静定。其在施工过程中系梁及拱肋线形、系杆和吊杆张拉力、结构内力等关键问题均需进行施工监控来解决。本文结合庞村西钢管混凝土系杆拱桥的施工监控项目，根据桥梁施工控制的理论和方法，并结合现场施工情况，建立了有效的施工监控系统，对施工各工况的数据采集，确保了成桥后主梁与主拱的线形、结构内力及吊杆拉力等符合规定值的要求，为建立完善的钢管混凝土系杆拱桥施工监控系统提供参考。本文主要完成的工作内容如下： 1.对钢管混凝土系杆拱桥的发展情况和发展趋势进行阐述，然后简述了钢管混凝土拱桥的施工监控目的、内容、方法。然后按照本工程的施工方案，介绍了其施工监控组织实施。 2.运用MIDAS/Civil软件建立有限元分析计算模型，对整个施工过程进行化分计算，给出各个施工阶段的结果，包括支座反力、结构内及位移、主梁与拱肋施工预拱度、吊杆张拉力等，确保桥梁在施工阶段的结构安全。 3.结合现场监测数据与理论值比较，对该桥施工阶段的监控结果进行分析。结果表明该桥在施工过程中拱肋及系梁受力状态良好,拱肋及系梁线行符合设计要求，吊杆轴力实测值与设计理论值接近,误差在5%以内。
[Abstract]:In the course of arch bridge development, concrete filled steel tube tied arch bridge is composed of beam and arch system, which exerts the structural performance of its own arch under compression and beam bending, which solves the contradiction between material, construction difficulty and span of arch bridge. The concrete filled steel tube tied arch bridge belongs to the external statically indeterminate, the internal super high order statically indeterminate. During the construction process, the tie beam and the arch rib line form, the tie rod and the suspender tensioning force, The key problems, such as structural internal force, need to be solved by construction monitoring. Combined with the construction monitoring project of Pang Cun Xi Concrete-filled Steel Tube tied Arch Bridge, according to the theory and method of bridge construction control, and combined with the field construction situation, An effective construction monitoring system is established to collect the data of the construction conditions to ensure that the alignment of the main beam and arch, the internal force of the structure and the tension of the suspender are in accordance with the requirements of the specified values, such as the main beam and the main arch after the completion of the bridge. It provides a reference for the construction monitoring system of Concrete-filled Steel Tube tied Arch Bridge. The main work of this paper is as follows:. 1. The development situation and development trend of concrete-filled steel tubular tied arch bridge are expounded, and then the purpose, content and method of construction monitoring of concrete-filled steel tubular arch bridge are briefly described. Then according to the construction plan of this project, The construction monitoring organization is introduced. 2. The finite element analysis and calculation model is established by using MIDAS/Civil software, and the results of each construction stage are given, including the reaction force of the support, the displacement of the structure, the pre-arch degree of the construction of the main beam and arch rib, the tension of the suspender, and so on. Ensure the structural safety of the bridge during the construction phase. 3.Combined with the field monitoring data and the theoretical value, the monitoring results of the bridge in the construction stage are analyzed. The results show that the arch rib and the girders are in good stress state during the construction process, and the arch rib and the tie beam line meet the design requirements. The measured value of shaft force is close to that of design theory, and the error is less than 5%.
【学位授予单位】：湖北工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.225;U445.1

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