| 大跨PC连续刚构桥跨中持续下挠成因分析 |
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| 引用本文： | 廖小文,崔相奎.大跨PC连续刚构桥跨中持续下挠成因分析[J].泰州职业技术学院学报,2010,10(3):72-75. |
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| 作者姓名： | 廖小文 崔相奎 |
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| 作者单位： | 1. 深圳高速工程顾问有限公司,广东,深圳,518129
2. 辽宁省高等级公路建设局,辽宁,沈阳,11003 |
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| 摘 要： | 跨中持续下挠和梁体开裂是大跨PC连续刚构桥存在的两个主要问题。文章从预应力混凝土梁桥长期挠度的计算公式出发，从力学本质上分析了截面上、下缘平均纵向正应力比与梁高之比沿桥轴线分布的均匀性对大跨度梁桥主跨跨中持续下挠的影响，以供工程设计人员参考。
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| 关 键 词： | 大跨PC连续刚构桥 跨中持续下挠 截面上 下缘平均纵向正应力比与梁高之比 |
Analysis of Long-term Deflection on Long-span PC Continuous Rigid-frame Bridge |
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| LIAO Xiao-wen,CUI Xiang-kui.Analysis of Long-term Deflection on Long-span PC Continuous Rigid-frame Bridge[J].Journal of Taizhou Polytechnical Institute,2010,10(3):72-75. |
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| Authors: | LIAO Xiao-wen CUI Xiang-kui |
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| Institution: | 1 .Shenzhen Expressway Engineering Consultants Co.Ltd., Shenzhen Guangdong 518129, China; 2.Liaoning Provincial High Class Highway Construction Bureau, Shenyang Liaoning 110003,China) |
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| Abstract: | There are two main problems for long-span PC continuous rigid-frame bridge are Long-term deflection and crack.Basis on the mechanical principle ,we analysised the long-term deflection reasons on the PC bridge. Giving the advice controlling the longitudinal principle stress ratio of the top and bottom and the beam hight of the bridge along the bridge axial. Reference for engineers. |
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| Keywords: | long-span PC continuous rigid-frame bridge long-term deflection the longitudinal principle stress ratio of the top and bottom and the beam hight of the bridge |
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