钢箱梁斜拉桥施工过程力学行为与其控制分析
发布时间：2018-08-27 11:08
【摘要】：随着中国对交通的需求不断增长,钢箱梁斜拉桥不断被修建,斜拉桥的计算方法与施工控制方法也不断进步发展。本文通以西樵大桥为工程背景,在有限元分析模型的基础上,对结构的索力施工方案、结构安全性进行了计算分析。同时借鉴国内外施工经验通过零初始位移法计算给出了西樵大桥的施工过程中的安装标高;根据几何控制法的原理,基于零初始位移法推导了钢箱梁的制造线形。本文研究内容主要包括:1)介绍钢箱梁斜拉桥的发展历史;总结和归纳斜拉桥施工模拟的重要性和模拟方法,总结各种类型的斜拉桥模拟方法的优缺点与应用范围。根据西樵大桥结构特点,选取单主梁模型法对西樵大桥的施工过程进行模拟分析。2)在西樵大桥MIDAS模型的基础上,计算比较通过设置索力调整工况达到成桥索力的施工方案与不设置调索工况的施工方案,在结构受力方面的优劣。同时基于有限元模型分析,计算给出了西樵大桥施工过程中斜拉桥的斜拉索、主梁受力变化情况以及主塔位移情况。在MIDAS有限元模型计算分析的基础上,分析西樵大桥在施工各阶段以及成桥阶段的第一类稳定安全系数。3)针对西樵大桥的调索施工阶段,结合影响矩阵的概念提出通过MIDAS有限元模型获得该阶段索力影响矩阵的方法。使用影响矩阵通过迭代计算出调索施工阶段的调索施加索力。比较计算索力结果与实际施工结果,说明利用影响矩阵进行调索索力计算的方法是可行与可靠的。4)详细介绍了零初始位移法与切线初始位移法。基于零初始位移法计算结构各施工过程的变形值,结合预拱度概念计算给出西樵大桥施工过程中钢箱梁阶段的安装标高。通过相邻梁段安装时关系,基于零初始位移法计算得出钢箱梁的制造线形。同通过在施工过程中对结构标高进行实际测量,验证基于几何控制法的斜拉桥控制理论的准确性。5)阐述无应力索长计算的基本理论,分别采用抛物线法与悬链线法计算西樵大桥的无应力索长。比较两种计算方法可知在短索的情况下,抛物线法已经具有足够的精度。6)对西樵桥大桥的主梁重量、主塔刚度、拉索弹性模量、温度的敏感性做了计算分析,得出各个因素对成桥状态的影响值。
[Abstract]:With the increasing demand for traffic in China, steel box girder cable-stayed bridges are being constructed continuously, and the calculation method and construction control method of cable-stayed bridges are developing steadily. Based on the construction experience at home and abroad, the installation elevation of Xiqiao Bridge is calculated by zero initial displacement method. According to the principle of geometric control method, the manufacturing alignment of steel box girder is deduced based on zero initial displacement method. According to the structural characteristics of Xiqiao Bridge, the single girder model is selected to simulate the construction process of Xiqiao Bridge. 2) Based on the MIDAS model of Xiqiao Bridge, the calculation and comparison are carried out by setting the cable force to adjust the working conditions. At the same time, based on the finite element model analysis, the cable of Xiqiao Bridge in the construction process, the force changes of the main girder and the displacement of the main tower are calculated. The first stability safety factor of Xiqiao Bridge is analyzed in each construction stage and completion stage. 3) Aiming at the cable adjustment construction stage of Xiqiao Bridge, a method of obtaining cable force influence matrix by MIDAS finite element model is put forward according to the concept of influence matrix. Cable force. Comparing the results of cable force calculation with the actual construction results, it shows that the method of cable force calculation using influence matrix is feasible and reliable. 4) Zero initial displacement method and tangent initial displacement method are introduced in detail. Installation elevation of steel box girder during bridge construction. The manufacturing alignment of steel box girder is calculated based on zero initial displacement method according to the installation time relationship of adjacent beam sections. The accuracy of control theory of cable-stayed bridge based on geometric control method is verified by actual measurement of structural elevation during construction. 5) The calculation of unstressed cable length is expounded. The parabola method and the catenary method are used to calculate the unstressed cable length of Xiqiao Bridge respectively. Comparing the two methods, the parabola method has enough precision in the case of short cables. 6) The weight of the main girder, the stiffness of the main tower, the elastic modulus of the cable and the temperature sensitivity of the main girder of Xiqiao Bridge are calculated and analyzed. The influence value of each factor on the completion state.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U448.27
本文编号：2207093
[Abstract]:With the increasing demand for traffic in China, steel box girder cable-stayed bridges are being constructed continuously, and the calculation method and construction control method of cable-stayed bridges are developing steadily. Based on the construction experience at home and abroad, the installation elevation of Xiqiao Bridge is calculated by zero initial displacement method. According to the principle of geometric control method, the manufacturing alignment of steel box girder is deduced based on zero initial displacement method. According to the structural characteristics of Xiqiao Bridge, the single girder model is selected to simulate the construction process of Xiqiao Bridge. 2) Based on the MIDAS model of Xiqiao Bridge, the calculation and comparison are carried out by setting the cable force to adjust the working conditions. At the same time, based on the finite element model analysis, the cable of Xiqiao Bridge in the construction process, the force changes of the main girder and the displacement of the main tower are calculated. The first stability safety factor of Xiqiao Bridge is analyzed in each construction stage and completion stage. 3) Aiming at the cable adjustment construction stage of Xiqiao Bridge, a method of obtaining cable force influence matrix by MIDAS finite element model is put forward according to the concept of influence matrix. Cable force. Comparing the results of cable force calculation with the actual construction results, it shows that the method of cable force calculation using influence matrix is feasible and reliable. 4) Zero initial displacement method and tangent initial displacement method are introduced in detail. Installation elevation of steel box girder during bridge construction. The manufacturing alignment of steel box girder is calculated based on zero initial displacement method according to the installation time relationship of adjacent beam sections. The accuracy of control theory of cable-stayed bridge based on geometric control method is verified by actual measurement of structural elevation during construction. 5) The calculation of unstressed cable length is expounded. The parabola method and the catenary method are used to calculate the unstressed cable length of Xiqiao Bridge respectively. Comparing the two methods, the parabola method has enough precision in the case of short cables. 6) The weight of the main girder, the stiffness of the main tower, the elastic modulus of the cable and the temperature sensitivity of the main girder of Xiqiao Bridge are calculated and analyzed. The influence value of each factor on the completion state.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U448.27
【参考文献】
相关期刊论文 前7条
1 杜蓬娟,黄才良,张哲,刘春城;公和斜拉桥施工控制[J];大连理工大学学报;2003年06期
2 肖汝诚,项海帆;斜拉桥索力优化及其工程应用[J];计算力学学报;1998年01期
3 汪劲丰;徐兴;项贻强;;悬臂浇注施工斜拉桥的误差控制方法[J];交通运输工程学报;2008年04期
4 林桢楷;;差值法确定矮塔斜拉桥的初张索力[J];科学技术与工程;2010年16期
5 秦顺全;斜拉桥安装无应力状态控制法[J];桥梁建设;2003年02期
6 苏成,范学明;斜拉桥施工控制参数灵敏度与可靠度分析[J];土木工程学报;2005年10期
7 狄谨,黄庆;无背索斜塔钢混凝土结合梁斜拉桥施工控制仿真[J];长安大学学报(自然科学版);2004年03期
相关硕士学位论文 前5条
1 张金树;大跨径连续刚构桥施工计算和控制[D];长安大学;2005年
2 安金星;大跨度斜拉桥施工控制与仿真计算[D];西南交通大学;2006年
3 白延芳;大跨度混凝土斜拉桥施工控制数值模拟方法探讨[D];西南交通大学;2009年
4 林桢楷;高低塔混合梁斜拉桥合理施工状态确定与施工控制[D];华南理工大学;2012年
5 孙文火;大跨度钢桁梁斜拉桥施工控制分析[D];华南理工大学;2014年
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