[1]张伟,潘方..悬索桥主缆的次应力分析[J].郑州大学学报(工学版),2005,26(04):29-33.[doi:10.3969/j.issn.1671-6833.2005.04.007]
　ZHANG Wei,Pan Fang.Secondary stress analysis of the main cable of the suspension bridge[J].Journal of Zhengzhou University (Engineering Science),2005,26(04):29-33.[doi:10.3969/j.issn.1671-6833.2005.04.007]

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悬索桥主缆的次应力分析()

分享到：

《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:

26

期数:

2005年04期

页码:

29-33

栏目:

出版日期:

1900-01-01

文章信息/Info

Title:

Secondary stress analysis of the main cable of the suspension bridge

作者:

张伟; 潘方.

同济大学土木工程防灾国家重点实验室,上海,200092, 同济大学建筑设计研究院市政分院,上海,200092

Author(s):

ZHANG Wei; Pan Fang

关键词:

悬索桥;  缆索;  次应力;  设计

Keywords:

suspension bridges;  cables;  secondary stress;  Design

DOI:

10.3969/j.issn.1671-6833.2005.04.007

文献标志码:

A

摘要:

针对在主缆的设计中,采用高的安全系数避免对细部次应力分析而使主缆的承载能力没有充分发挥的现状,尝试对悬索桥的次应力进行较为详细的分析.对悬索桥的主缆由于丝股长度差异、钢丝弹性模量差异以及钢丝弯曲等原因产生的次应力进行分析,并给出了相应的经验计算公式;对缆索角度变化产生的次应力,对以往的计算方法进行了分析,并针对更一般的情况进行了理论分析和公式推导,给出了计算算法;对于由于缆索形状的变化而产生次应力,分解为空隙率差异、截面特性差异、截面形状差异三部分进行分析.分析了悬索桥主缆出主鞍近六边形截面到第一个索夹处圆形截面引起的次应力.最后,结合国内某大跨度悬索桥主缆次应力计算的实例,对次应力的发生部位以及次应力对结构安全的影响进行了分析,并按照英国、日本和丹麦大跨度悬索桥主缆安全系数的计算方法对实例的安全系数进行了分析,认为其安全性能够得到保证.

Abstract:

In view of the fact that in the design of the main cable, the high safety factor is used to avoid the detailed secondary stress analysis and the bearing capacity of the main cable is not fully utilized, a more detailed analysis of the secondary stress of the suspension bridge is attempted. The secondary stress of the main cable of the suspension bridge due to the difference in wire strand length, the elastic modulus of steel wire and the bending of steel wire was analyzed, and the corresponding empirical calculation formula was given. The secondary stress caused by the change of cable angle is analyzed by the previous calculation method, and the theoretical analysis and formula derivation are carried out for more general situations, and the calculation algorithm is given. The secondary stress caused by the change of cable shape is decomposed into three parts: porosity difference, cross-section characteristic difference, and cross-section shape difference. The secondary stress caused by the circular section of the main cable out of the main saddle to the circular section of the first cable clamp was analyzed. Finally, combined with the example of calculating the secondary stress of the main cable of a long-span suspension bridge in China, the occurrence of the secondary stress and the influence of the secondary stress on the structural safety are analyzed, and the safety factor of the case is analyzed according to the calculation method of the main cable of the long-span suspension bridge in the United Kingdom, Japan and Denmark, and its safety can be guaranteed.

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