| 大跨径悬索桥主缆安全系数的研究 |
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| 引用本文： | 徐军,王晓冬,唐茂林,宋晖.大跨径悬索桥主缆安全系数的研究[J].桥梁建设,2011(5). |
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| 作者姓名： | 徐军 王晓冬 唐茂林 宋晖 |
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| 作者单位： | 1. 中交公路规划设计院有限公司,北京,100088
2. 西南交通大学,四川成都,610031 |
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| 基金项目： | 国家科技支撑计划重点项目(2008BAGO7B01) |
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| 摘 要： | 为研究主跨1 000m以上大跨径悬索桥主缆安全系数的取值问题,建立西堠门大桥(主跨1 650m的两跨连续梁悬索桥)空间几何非线性有限元模型,分别按照各国的荷载标准对模型进行加载,计算结构在荷载作用下的内力及位移,并根据相应的规范进行荷载组合,计算出主缆相应的安全度,采用Wyatt公式进一步计算模型考虑主缆二次应力后的安全系数。计算分析结果表明,大跨径悬索桥主缆安全系数可由2.5降低至2.3,从而给出了大跨径悬索桥主缆容许应力安全系数2.3的建议值。
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| 关 键 词： | 悬索桥 设计规范 主缆 安全系数 二次应力 荷载标准 |
Study of Safety Factor of Main Cable of Long Span Suspension Bridge |
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| XU Jun,WANG Xiao-dong,TANG Mao-lin,SONG Hui.Study of Safety Factor of Main Cable of Long Span Suspension Bridge[J].Bridge Construction,2011(5). |
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| Authors: | XU Jun WANG Xiao-dong TANG Mao-lin SONG Hui |
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| Institution: | XU Jun1,WANG Xiao-dong1,TANG Mao-lin2,SONG Hui1 (1.CCCC Highway Consultants Co.,Ltd.,Beijing 100088,China,2.Southwest Jiaotong University,Chengdu 610031,China) |
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| Abstract: | To study the value selection for the safety factor of the main cable of long span suspension bridge with a main span longer than 1 000 m,the finite element model of spatial geometric nonlinearity was set up for the Xihoumen Bridge(a two-span continuous girder suspension bridge with a main span 1 650 m),the loads were applied to the model respectively in accordance with the load standards of different countries and the internal forces and displacement of the structure under the action of the loads were calcu... |
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| Keywords: | suspension bridge design code main cable safety factor secondary stress load standard |
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