独塔自锚式悬索桥基准索股架设温度影响分析
|
摘要
针对悬索桥几何形状对温度极为敏感的特点,研究了主缆架设过程中基准索股架设时的温度效应。以甘肃天水市罗家沟独塔自锚式悬索桥为工程背景,对基准索股架设阶段进行温度场实时观测,得到了该桥主缆的温度场。根据无应力索长不变原理,运用FORTRAN语言编写了非线性迭代计算程序,得到了不同温度下的索股垂度值,并与实测结果进行对比,验证了该迭代法计算结果的正确性。将迭代法计算值作为现场基准索股架设时的理论依据,进行基准索股线形控制。结果表明:该方法计算结果较为精确,可直接指导工程实际,具有较强的推广和应用价值。
In view of the sensitivity of the geometry of suspension bridge to temperature,the temperature effect of standard strand during erection of main cable was studied. Taking the Luojiagou single tower self-anchored suspension bridge in Tianshui of Gansu province as background,the temperature field of datum strand during erection was observed in real time and the temperature field of main cable of the bridge was obtained. According to the principle of constant stressless director,the non-linear iterative calculation program was wrote by using FORTRAN language. The cable sag values under different temperatures were obtained and compared with the measured results,then the validity of the calculation results of the iterative method was verified. The calculated value of the iterative method was taken as the theoretical basis for datum stranderection in the field,and the linear control of datum strand was carried out. The results show that the calculation results of this method are more accurate,which can directly guide the engineering practice,and have strong popularization and application value.
In view of the sensitivity of the geometry of suspension bridge to temperature,the temperature effect of standard strand during erection of main cable was studied. Taking the Luojiagou single tower self-anchored suspension bridge in Tianshui of Gansu province as background,the temperature field of datum strand during erection was observed in real time and the temperature field of main cable of the bridge was obtained. According to the principle of constant stressless director,the non-linear iterative calculation program was wrote by using FORTRAN language. The cable sag values under different temperatures were obtained and compared with the measured results,then the validity of the calculation results of the iterative method was verified. The calculated value of the iterative method was taken as the theoretical basis for datum stranderection in the field,and the linear control of datum strand was carried out. The results show that the calculation results of this method are more accurate,which can directly guide the engineering practice,and have strong popularization and application value.
引文
[1]王达,张永健,黄平明.大跨度悬索桥主缆施工温度时变效应研究[J].公路交通科技,2010,27(12):72-77.
[2]刘世忠,贾一全,王苍和,等.大温差影响下刘家峡大桥基准索股的调整[J].桥梁建设,2014,44(3):51-56.
[3]林一宁,余屏孙,林亚超.悬索桥架设期间主缆温度测试研究[J].桥梁建设,1997,27(3):60-68.
[4]唐茂林,强士中,沈锐利.悬索桥成桥主缆线形计算的分段悬链线法[J].铁道学报,2003,25(1):87-91.
[5]谭红梅,葛凯,曾勇,等.悬索桥锚跨索股张拉力监控[J].铁道建筑,2010,50(8):43-46.
[6]李传习,刘光栋,柯红军.悬索桥主缆系统数值解析法计算的一种收敛算法[J].工程力学,2008,25(7):66-73.
[7]唐茂林.大跨度悬索桥空间几何非线性分析与软件开发[D].成都:西南交通大学,2003.
[8]项海帆.高等桥梁结构理论[M].北京:人民交通出版社,2001.
[9]刘来君,贺拴海.索鞍无预偏施工悬索桥主缆的温度效应[J].长安大学学报(自然科学版),2007,27(1):40-44.
[2]刘世忠,贾一全,王苍和,等.大温差影响下刘家峡大桥基准索股的调整[J].桥梁建设,2014,44(3):51-56.
[3]林一宁,余屏孙,林亚超.悬索桥架设期间主缆温度测试研究[J].桥梁建设,1997,27(3):60-68.
[4]唐茂林,强士中,沈锐利.悬索桥成桥主缆线形计算的分段悬链线法[J].铁道学报,2003,25(1):87-91.
[5]谭红梅,葛凯,曾勇,等.悬索桥锚跨索股张拉力监控[J].铁道建筑,2010,50(8):43-46.
[6]李传习,刘光栋,柯红军.悬索桥主缆系统数值解析法计算的一种收敛算法[J].工程力学,2008,25(7):66-73.
[7]唐茂林.大跨度悬索桥空间几何非线性分析与软件开发[D].成都:西南交通大学,2003.
[8]项海帆.高等桥梁结构理论[M].北京:人民交通出版社,2001.
[9]刘来君,贺拴海.索鞍无预偏施工悬索桥主缆的温度效应[J].长安大学学报(自然科学版),2007,27(1):40-44.