正装迭代法在确定斜拉桥成桥状态索力中的应用
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摘要
以仓安路斜拉桥施工过程为研究背景,采用有限元分析软件ANSYS,实现了斜拉桥施工过程的模拟计算。研究以约束正装迭代法进行施工过程中索力优化与合理施工状态确定的问题,建立各次张拉索力值与成桥状态控制参数之间的关系矩阵,以最小二乘法原理对施工中张拉索力值进行修正,通过迭代消除不闭合问题,从而可使施工索力得到优化,达到预先设定的成桥内力。实例证明,正装迭代法在确定斜拉桥成桥状态的索力应用上,具有应用简单,误差较小的优点,效果较好。
In this thesis,a simulative computation is realized of the construction of the cable-stayed bridge at Cang'an Road through the finite element analysis software ANSYS. The optimum of tensioning force and the reasonable construction state are decided through restricted iterative calculation. Comparing the calculated finished mechanical state with the reasonable finished state,the relation matrix is then established between tensioning forces and parameters of finished state. After modified with the least square method,the tensioning force is applied to the next round computing until the difference between calculated and reasonable state is in the allowed range. The method can achieve optimization of cable force and the finished internal force and line shape as predefined. As is proved,this method can reduce the influence of uncertain factors in computation because it has high accuracy and efficiency in cable bridge construction controlling,and can provide reference for similar construction.
In this thesis,a simulative computation is realized of the construction of the cable-stayed bridge at Cang'an Road through the finite element analysis software ANSYS. The optimum of tensioning force and the reasonable construction state are decided through restricted iterative calculation. Comparing the calculated finished mechanical state with the reasonable finished state,the relation matrix is then established between tensioning forces and parameters of finished state. After modified with the least square method,the tensioning force is applied to the next round computing until the difference between calculated and reasonable state is in the allowed range. The method can achieve optimization of cable force and the finished internal force and line shape as predefined. As is proved,this method can reduce the influence of uncertain factors in computation because it has high accuracy and efficiency in cable bridge construction controlling,and can provide reference for similar construction.
引文
[1]吴玉华,郭剑飞,蔡若红.非一致激励下大跨斜拉桥的随机地震响应分析[J].公路工程,2013,38(3):48-52.
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[3]郭木华.确定斜拉桥索力调整的实用计算方法[J].公路工程,2010,35(2):108-110.
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[9]王聪.基于全过程的斜拉桥索力优化[D].长沙:湖南大学,2007.
[10]王新征,庄守明,王宗华.斜拉桥施工过程的仿真计算与分析[J].南阳师范学院学报,2009,12(8),37-40.
[2]池瑜.独塔单索面混凝土斜拉桥索力确定及优化[D].武汉理工大学,2009.
[3]郭木华.确定斜拉桥索力调整的实用计算方法[J].公路工程,2010,35(2):108-110.
[4]张连海.钢管混凝土系杆拱桥施工过程关键技术分析研究[D].苏州:苏州科技学院,2011.
[5]王新征,邢利英.混凝土斜拉桥索力优化与合理施工状态的研究[J].人民长江,2010,41(2),28-37.
[6]昂云红.移动支架现浇混凝土斜拉桥施工特点与控制技术研究[D].西安:长安大学,2012.
[7]颜东煌.斜拉桥合理设计状态确定与施工控制[D].长沙:湖南大学,2001.
[8]李宏林.斜拉桥施工张拉索力的确定[J].山西建筑,2007,33(17),332-333.
[9]王聪.基于全过程的斜拉桥索力优化[D].长沙:湖南大学,2007.
[10]王新征,庄守明,王宗华.斜拉桥施工过程的仿真计算与分析[J].南阳师范学院学报,2009,12(8),37-40.
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