| 悬索桥鞍座处CFRP主缆抗弯性能研究 |
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| 引用本文： | 诸葛萍,强士中,侯苏伟,刘明虎.悬索桥鞍座处CFRP主缆抗弯性能研究[J].中国公路学报,2011(4). |
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| 作者姓名： | 诸葛萍 强士中 侯苏伟 刘明虎 |
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| 作者单位： | 西南交通大学土木工程学院;中交公路规划设计院有限公司; |
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| 基金项目： | 国家高技术研究发展计划(“八六三”计划)项目(2008AA11Z101) |
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| 摘 要： | 首先通过对鞍座处CFRP丝的力学性能分析,建立了CFRP丝弯曲强度计算理论,利用理论公式分析了CFRP丝直径和弯曲半径对弯曲强度的影响,并对CFRP丝临界弯曲半径作出推算;接着对CFRP丝在鞍座处的抗弯性能进行了模型试验研究,实测了3种弯曲半径对应的弯曲极限拉力;最后对理论分析结果和试验实测结果作了对比。研究结果表明:CFRP丝在大跨悬索桥鞍座处的弯曲张拉效率超过90%;CFRP主缆弯曲强度计算值与实测值吻合较好;当弯曲半径一定时,弯曲强度随着CFRP丝直径的增大而线性减少,当CFRP丝直径一定时,弯曲强度随着弯曲半径的增大而非线性增加,CFRP丝临界弯曲半径随着CFRP丝直径的增大而线性增加;CFRP丝在鞍槽上的包角对弯曲极限拉力没有影响。
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| 关 键 词： | 桥梁工程 主缆 抗弯性能试验 鞍座 悬索桥 CFRP丝 |
Research on Bending Performance of CFRP Main Cable in Saddle of Suspension Bridge |
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| ZHUGE Ping,QIANG Shi-zhong,HOU Su-wei,LIU Ming-hu.Research on Bending Performance of CFRP Main Cable in Saddle of Suspension Bridge[J].China Journal of Highway and Transport,2011(4). |
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| Authors: | ZHUGE Ping QIANG Shi-zhong HOU Su-wei LIU Ming-hu |
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| Institution: | ZHUGE Ping1,QIANG Shi-zhong1,HOU Su-wei1,LIU Ming-hu2(1.School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan,China,2.CCCC Highway Consultants Co.,Ltd.,Beijing 100088,China) |
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| Abstract: | Firstly,the bending strength theory of carbon fiber reinforced plastic(CFRP) wire was founded through analyzing the mechanical behaviors of CFRP wire in saddle,and influences of CFRP wire diameter and bending radius on bending strength were studied by theoretical formula.Then,the critical bending radius of CFRP wire was calculated,bending performance of CFRP wire in saddle was studied,the ultimate bending tensions with three kinds of bending radii were measured.Finally,the theoretical analysis results and t... |
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| Keywords: | bridge engineering main cable bending performance test saddle suspension bridge carbon fiber reinforced plastic wire |
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