钢箱系杆拱桥施工监控与仿真分析-桥梁与隧道工程专业论文.docxVIP

贵州大学硕士研究生毕业论文 钢箱系杆拱桥施工监控与仿真分析 万方数据 钢箱系杆拱桥施工监控与仿真分析 摘 要 本文针对系杆拱桥施工控制的难题，结合茅台三桥主桥这一具体工程实例，详细阐 述了施工控制理论与方法，并对该桥上部结构进行静力分析、结构振动分析以及吊杆索 力测试与调整分析。 系杆拱桥为外部静定，内部超静定结构，由于它造型优美，地基适应能力强，在贵 州境内使用得越来越多。大跨径拱桥施工过程中的线形和应力控制至关重要，本文分析 了几种常用的施工控制方法，并采用 Midas/Civil 有限元分析软件对茅台三桥主桥上部结 构进行静力分析，计算得到该桥控制截面的应力和位移指标。通过实测数据与理论指标 对比，得出实际结构施工过程中应力和位移在可控范围内的结论。通过结构振动分析， 比较结构前四阶自振模态，发现该桥上部结构刚度满足规范要求，且结构振型耦合现象 出现的概率较低。 吊杆索力测试与调整是系杆拱桥施工与监控的技术难点。本文运用频率法在吊杆张 拉过程中反复测试吊杆索力，总结出该方法适用的吊杆有效长度范围，并成功运用于吊 杆索力调整与优化过程。笔者借鉴前人的理论思想，利用影响矩阵法对茅台三桥吊杆索 力进行了调整计算，实测结果表明，调整效果较好，该方法简单可行。为进一步提高吊 杆索力调整精度和效率，笔者首次提出了横向影响矩阵的概念，并将横向影响矩阵与纵 向影响矩阵进行组合，总结出了组合影响矩阵的索力调整方法，该方法针对高次超静定 系杆拱桥更加方便、有效。 关键词:系杆拱桥；线形；应力；索力调整；影响矩阵 I  The construction monitoring andsimulation analysis ofsteel box tied arcbridge Abstract Aiming at solving the construction controlling issues, this paper expounds the construction control theory and conduct the static analysis, structural vibration analysis and analysis of suspender force measurement and adjustment of the superstructure of the main bridge of Moutai Three Bridge . Steel box tied arc bridge is of external static stability and internal statically indeterminate. As its appealing design and great adaptive capacity to foundation, it has been widely applied within Guizhou Province. The linear and stress control issue in the progress of construction is of great importance to long-span arch bridge construction. This paper analyzes several common construction control methods and conduct the static analysis of the superstructure by Midas/Civil, from which the stress and displacement index of the control section are obtained. With the comparison of experimental data and theoretical index, conclusion that the stress and displacement in real construction are in the controllable range. By comparing the first four moments of the vibration mode from structural vibration analysis, this paper found that the stiffness of superstructure meets the requirement and the coupled phenomenon of the structure mode is of