| 体内外混合配索在大跨度预应力连续刚构桥中的应用 |
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| 引用本文： | 刘永棵,张雪松,向中富,石鹏程.体内外混合配索在大跨度预应力连续刚构桥中的应用[J].重庆交通大学学报(自然科学版),2008,27(3):356-359,391. |
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| 作者姓名： | 刘永棵 张雪松 向中富 石鹏程 |
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| 作者单位： | 重庆交通大学,土木建筑学院,重庆,400074;重庆交通大学,土木建筑学院,重庆,400074;重庆交通大学,土木建筑学院,重庆,400074;重庆交通大学,土木建筑学院,重庆,400074 |
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| 摘 要： | 针对目前大跨度预应力连续刚构桥普遍出现的腹板开裂和跨中下挠的情况,以新滩綦江大桥为工程背景,介绍了一种新的配索体系——体内外混合配索。通过对左幅体内预应力桥和右幅体内外混合配索桥的有限元对比分析,总结出两幅桥的不同受力特点;并从控制斜裂缝的开展、抑制跨中下挠和经济性3方面,对体内外混合配索的优势进行了探讨。
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| 关 键 词： | 体外预应力 连续刚构桥 对比分析 |
Application and Research of Internal and External Prestressing in the Large Span Continuous Ridge-Frame Bridge |
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| LIU Yong-ke,ZHANG Xue-song,XIANG Zhong-fu,SHI Peng-cheng.Application and Research of Internal and External Prestressing in the Large Span Continuous Ridge-Frame Bridge[J].Journal of Chongqing Jiaotong University,2008,27(3):356-359,391. |
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| Authors: | LIU Yong-ke ZHANG Xue-song XIANG Zhong-fu SHI Peng-cheng |
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| Institution: | LIU Yong-ke,ZHANG Xue-song,XIANG Zhong-fu,SHI Peng-cheng(School of Civil Engineering & Architecture,Chongqing Jiaotong University,Chongqing 400074,China) |
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| Abstract: | In view of cracks in the webs and deflections in the middle of span widespreadly existing in the current large span continuous ridge-frame bridge,the Xitan Qijiang bridge has been taken as an example,and a new prestressing system——the internal and external prestressing technique has also been introduced.The right bridge is designed with internal and external prestressing,whereas the other one is designed with internal prestressing.The results of two bridgos have been compared to gain the differences in suffering.From aspects of controling ramp cracks,repressing deflections in the middle of span and economy,the advantages of the internal and external prestressing technique have been discussed. |
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| Keywords: | external prestressing continuous ridge-frame bridge comparative analysis |
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