钢管混凝土拱桥扣索一次张拉索力优化改进算法
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摘要
为避免施工中反复调索的繁琐工作,同时保证钢拱肋松索成拱后线形满足期望要求,基于零阶优化法,运用大型有限元分析软件ANSYS,开展钢管拱肋扣索一次张拉索力优化研究.提出基于扣索内力法确定索力迭代初值并在各迭代子步中对程序自动搜索值进行宏观调整的改进算法.算例表明:改进算法可提高迭代效率和计算精度,按优化出的索力和预抬量进行施工控制,钢拱肋松索成拱线形与设计值吻合良好,克服了传统力学法调索中存在的较大马鞍形变形问题.
To avoid repeated adjustment of cable force and to make the into-arch alignment meet the desired requirements, basing on zero-order optimization, optimization analysis of cable force of one-time tensioning is studied by the use of large finite element analysis software ANSYS. The improved arithmetic basing on internal force determine initial value of cable force and conducting a macro readjustment on the automatic search value of program in each iteration substep is put forward. The example shows that iterative efficiency and calculation accuracy are improved, and the into-arch alignment tallies with objecting linear well with the use of the optimized cable force and pre-camber, the problem of large saddle shape deformation existed in the traditional mechanics method is conquered.
To avoid repeated adjustment of cable force and to make the into-arch alignment meet the desired requirements, basing on zero-order optimization, optimization analysis of cable force of one-time tensioning is studied by the use of large finite element analysis software ANSYS. The improved arithmetic basing on internal force determine initial value of cable force and conducting a macro readjustment on the automatic search value of program in each iteration substep is put forward. The example shows that iterative efficiency and calculation accuracy are improved, and the into-arch alignment tallies with objecting linear well with the use of the optimized cable force and pre-camber, the problem of large saddle shape deformation existed in the traditional mechanics method is conquered.
引文
[1] 赖秀英,陈宝春.钢管混凝土拱桥徐变系数模型对比分析[J].福州大学学报(自然科学版),2014,42(5):737-743.
[2] 张磊.大跨径斜拉桥桥面线形调整技术研究[D].重庆:重庆交通大学,2015.
[3] 胡大琳,陈定市,赵小由,等.大跨径钢筋混凝土拱桥悬臂浇筑施工控制[J].交通运输工程学报,2016,16(1):25-36.
[4] 陈得良,缪莉,田仲初,等.大跨度桥梁拱肋悬拼时扣索索力和预抬量计算[J].工程力学,2007,24(5):132-137.
[5] 张治成,叶贵如,王云峰.大大跨度拱桥拱肋线形调整中的扣索索力优化[J].工程力学,2004,21(6),187-192.
[6] 徐岳,展丙来,李杨,等.钢管混凝土拱桥斜拉扣挂施工扣索索力的优化计算方法[J].公路交通科技,2016,33(6):65-69.
[7] 徐岳,申成岳,注谊彪,等.确定拱桥斜拉扣挂施工扣索张力的改进迭代算法[J].桥梁建设,2016,46(2):61-67.
[8] 刘邵平,张敏,段永胜.基于零阶优化法的大宁河大桥扣索索力计算[J].市政技术,2009,27 (4):354-356.
[9] 黄民水,程劭照,卢海林.考虑温度影响的曲线箱梁有限元模型修正[J].土木工程与管理学报,2017,34(1):29-32.
[10] 刘阔.基长山大桥的优化设计[D].大连:大连海事大学,2015.
[11] 刘晓宝.大跨混合梁斜拉桥钢箱梁段悬臂拼装线形计算研究[J].施工技术,2017,46(11):29-31.
[12] 李哲,赵东升,颜东煌.大跨度钢管混凝土拱桥制造线形计算方法研究[J].中外公路,2015,35(4):107-110.
[13] 李国平,黎金星.基于无应力长度目标的平行钢绞线斜拉索张拉方法[J].中国公路学报,2017,30(2):48-56.
[2] 张磊.大跨径斜拉桥桥面线形调整技术研究[D].重庆:重庆交通大学,2015.
[3] 胡大琳,陈定市,赵小由,等.大跨径钢筋混凝土拱桥悬臂浇筑施工控制[J].交通运输工程学报,2016,16(1):25-36.
[4] 陈得良,缪莉,田仲初,等.大跨度桥梁拱肋悬拼时扣索索力和预抬量计算[J].工程力学,2007,24(5):132-137.
[5] 张治成,叶贵如,王云峰.大大跨度拱桥拱肋线形调整中的扣索索力优化[J].工程力学,2004,21(6),187-192.
[6] 徐岳,展丙来,李杨,等.钢管混凝土拱桥斜拉扣挂施工扣索索力的优化计算方法[J].公路交通科技,2016,33(6):65-69.
[7] 徐岳,申成岳,注谊彪,等.确定拱桥斜拉扣挂施工扣索张力的改进迭代算法[J].桥梁建设,2016,46(2):61-67.
[8] 刘邵平,张敏,段永胜.基于零阶优化法的大宁河大桥扣索索力计算[J].市政技术,2009,27 (4):354-356.
[9] 黄民水,程劭照,卢海林.考虑温度影响的曲线箱梁有限元模型修正[J].土木工程与管理学报,2017,34(1):29-32.
[10] 刘阔.基长山大桥的优化设计[D].大连:大连海事大学,2015.
[11] 刘晓宝.大跨混合梁斜拉桥钢箱梁段悬臂拼装线形计算研究[J].施工技术,2017,46(11):29-31.
[12] 李哲,赵东升,颜东煌.大跨度钢管混凝土拱桥制造线形计算方法研究[J].中外公路,2015,35(4):107-110.
[13] 李国平,黎金星.基于无应力长度目标的平行钢绞线斜拉索张拉方法[J].中国公路学报,2017,30(2):48-56.