| 考虑徐变的钢管混凝土拱桥结构分析 |
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| 引用本文： | 顾建中,刘西拉,陈卫峰.考虑徐变的钢管混凝土拱桥结构分析[J].上海交通大学学报,2001,35(10):1574-1577. |
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| 作者姓名： | 顾建中 刘西拉 陈卫峰 |
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| 作者单位： | 上海交通大学建筑工程与力学学院, |
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| 摘 要： | 钢管混凝土拱桥的建造过程可以分为相互联系的三个阶段：拱肋施工阶段、桥面系统施工阶段和使用老化阶段。计算中要考虑它们共同对结构的影响。在使用老化阶段，拱桥在徐变会影响其变形和内部受力状态。通过使用ACI209密闭混凝土的徐变公式和逐步计算法，根据拱桥在徐变过程中的特点，利用有限元工具计算出拱桥的徐变结果。从计算结果可以看出，钢管混凝土拱桥的徐变与普通有干燥的混凝土是不同的，表现在对数时间坐标上，其徐变变形即使在几十年后也不会趋于水平。
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| 关 键 词： | 钢管混凝土 拱桥 徐变 迭加法 密闭混凝土 |
| 文章编号： | 1006-2467(2001)10-1574-04 |
| 修稿时间： | 2000年6月8日 |
Structure Analysis with the Effect of Creep in CFT Arch Bridge |
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| GU Jian-zhong,LIU Xi-la,CHEN Wei-feng.Structure Analysis with the Effect of Creep in CFT Arch Bridge[J].Journal of Shanghai Jiaotong University,2001,35(10):1574-1577. |
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| Authors: | GU Jian-zhong LIU Xi-la CHEN Wei-feng |
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| Abstract: | The life of CFT arch bridge can be divided into three stages: arch construction, beam construction and age, each of which relates to the other one. In the stage of service, displacement and interior force are changed with the effect of creep of core concrete. And the time-dependent deformation is calculated with the help of FEM software and special mechanical property in the process. The creep function of sealed concrete of ACI 209 and step-by-step method are used. The numerical result reveals that the creep of CFT arch bridge is different from that of RC one, which lasts much longer than usual. |
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| Keywords: | concrete-filled steel tube arch bridge creep supersition method sealed concrete |
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