| 克服大跨PC连续刚构桥后期下挠设计措施 |
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| 引用本文： | 刘山洪.克服大跨PC连续刚构桥后期下挠设计措施[J].重庆交通学院学报,2006,25(6):4-7. |
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| 作者姓名： | 刘山洪 |
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| 作者单位： | 西南交通大学交通运输工程博士后流动站 四川成都610031，重庆交通大学土木建筑学院，重庆400074 |
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| 摘 要： | 对比分析几座大跨径预应力连续刚构桥后期下挠过度引起梁体开裂的主要设计参数,阐述了引起后期下挠的主要原因.为提高箱梁持久抗剪承载力,提出构造措施上可供参考的设计参数,并提出克服箱梁后期持续下挠的具体措施,有效地保障梁体处于健康状态.
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| 关 键 词： | 预应力砼 连续刚构桥 箱梁 设计 预拱度 |
| 收稿时间： | 2005-08-25 |
| 修稿时间： | 2005-10-17 |
Overcoming post-downwarping of long span PC continuous rigid frame girder by design measures |
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| LIU Shan-hong.Overcoming post-downwarping of long span PC continuous rigid frame girder by design measures[J].Journal of Chongqing Jiaotong University,2006,25(6):4-7. |
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| Authors: | LIU Shan-hong |
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| Abstract: | Comparing with the design parameters of several long span prestressed concrete continuous rigid frame girders,which have excessive downwarping caused by girder cracking,the main reasons of causing girder downwarping are presented.In order to improve the permanent shear carrying capacity of box girder,design parameters of improving structural measures are proposed.Specific measures,which can overcome the continual post-downwarpings of box girders,are presented.They can also guarantee girders in health states effectively. |
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| Keywords: | prestressed concrete continuous rigid frame girder box girder design camber |
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