| 抗弯刚度对主缆线形的影响 |
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| 引用本文： | 严琨,沈锐利,陈卫国,唐茂林.抗弯刚度对主缆线形的影响[J].桥梁建设,2011(1). |
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| 作者姓名： | 严琨 沈锐利 陈卫国 唐茂林 |
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| 作者单位： | 1. 西南交通大学桥梁系,四川,成都,610031
2. 浙江省舟山连岛工程建设指挥部,浙江,舟山,316000 |
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| 基金项目： | 国家科技支撑计划重点项目(2008BAGO7B05) |
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| 摘 要： | 随着悬索桥跨径的不断增加,主缆截面也越来越大,主缆的抗弯刚度对主缆的线形将产生一定的影响,通过建立考虑抗弯刚度的主缆线形计算公式,提出主缆与鞍座切点的修正方法。建立不同边界条件和有、无鞍座的主缆有限元计算模型,分析抗弯刚度对主缆线形的影响。结果表明:抗弯刚度对主缆的线形影响较大;抗弯刚度越大,主缆与鞍座的切点越靠近鞍座顶部;当跨中垂度不变时,随着抗弯刚度的增大,抗弯刚度对主缆线形影响的最大位置由鞍座处向跨中移动;当垂度变化时,随着主缆水平张力的增大,抗弯刚度对主缆线形影响的最大位置由跨中向鞍座处移动;考虑鞍座时会减小抗弯刚度对主缆线形的影响。
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| 关 键 词： | 悬索桥 主缆 抗弯刚度 线形 鞍座 |
Influence of Bending Rigidity on Geometric Shape of Main Cable |
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| YAN Kun,SHEN Rui-li,CHEN Wei-guo,TANG Mao-lin.Influence of Bending Rigidity on Geometric Shape of Main Cable[J].Bridge Construction,2011(1). |
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| Authors: | YAN Kun SHEN Rui-li CHEN Wei-guo TANG Mao-lin |
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| Institution: | YAN Kun1,SHEN Rui-li1,CHEN Wei-guo2,TANG Mao-lin1(1.Department of Bridge Engineering,Southwest Jiaotong University,Chengdu 610031,China,2.Zhejiang Provincial Construction Headquarters of Zhoushan Mainland and Islands Link Project,Zhoushan 316000,China) |
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| Abstract: | With the constant increase of span length of suspension bridge,the section of main cable of the bridge becomes larger and larger and the bending rigidity of the main cable will exert certain influence on the geometric shape of the cable.By way of creating a calculation formula for the geometric shape of the cable,taking into consideration of the bending rigidity,the modification method for tangent point between the cable and cable saddle is put forward,the finite element calculation models for different bou... |
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| Keywords: | suspension bridge main cable bending rigidity geometric shape saddle |
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