广东工业大学学报 ›› 2018, Vol. 35 ›› Issue (06): 63-68.doi: 10.12052/gdutxb.180001

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基于统一理论的钢管混凝土拱桥稳定性分析

刘铭炜, 禹智涛, 贺绍华   

  1. 广东工业大学 土木与交通工程学院, 广东 广州 510006
  • 收稿日期:2018-01-03 出版日期:2018-11-23 发布日期:2018-09-12
  • 通信作者: 贺绍华(1989-),男,讲师,博士,主要研究方向为基于高性能材料的桥梁结构.E-mail:hesh@gdut.edu.cn E-mail:hesh@gdut.edu.cn
  • 作者简介:刘铭炜(1992-),男,硕士研究生,主要研究方向为大跨度桥梁稳定性.
  • 基金资助:
    国家自然科学基金资助项目（51508109）

A Stability Analysis of Steel Tube Concrete Arch Bridge Based on Unified Theory

Liu Ming-wei, Yu Zhi-tao, He Shao-hua   

  1. School of Civil Engineering and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China
  • Received:2018-01-03 Online:2018-11-23 Published:2018-09-12

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摘要： 基于GB 50923-2013及JTG/T D65-06-2015两种钢管混凝土拱桥规范对拱肋刚度取值的差异，利用15组钢管与混凝土组合依据两种规范规定的方法计算拱肋刚度，并利用ANSYS分别基于两种拱肋刚度取值方法模拟单拱肋试验，分析两种规范对拱肋刚度取值的合理性. 最后以一标准钢管混凝土拱桥为对象，利用统一理论建立有限元模型，分析横撑对其稳定性的影响. 结果表明：两种规范对拱肋刚度的计算结果误差在10%以内；利用ANSYS采用统一理论模拟单拱肋比采用双单元法建模更为方便快捷，且模拟结果更符合试验结果. 横撑形式为“X”撑时，拱桥稳定系数比“H”撑、“K”撑及“一”字撑分别高出4.3%、0.6%及17.8%；横撑数量由0增加到2时，标准钢管混凝土拱桥稳定系数提高41.2%，提高速率最快且继续增加横撑数量，而稳定系数提高速率有所降低；在1/4跨至5/8跨之间设置横撑可以使钢管混凝土拱桥稳定性达到最优的效果.

关键词: 钢管混凝土拱桥, 统一理论, 稳定性分析, ANSYS

Abstract: Difference of arch rib stiffness based on two concrete-filled steel tube arch bridge standard of GB 50923-2013 and JTG/T D65-06-2015, 15 groups of steel tubes and concrete according to the method of two specifications were calculated. In order to analyze rationality of the two specifications of arch rib stiffness, the FEM analysis of ANSYS was used to simulate a single arch rib. Finally, a standard steel tube concrete arch bridge was used to establish the finite element model and analyze the influence of horizontal bracing on its stability. The results indicate that the error of the calculation result of the rigidity of the arch rib is within 10%. The single arch rib simulated by ANSYS using the unified theory is more convenient and faster than using the double-element method, and the result of simulation is more consistent with the test result. The stability coefficient of arch bridge by using "X" brace is 4.3%, 0.6% and 17.8% higher than that of "H" brace, "K" brace and "一" brace respectively. When the number of bracing increased from zero to 2, the stability coefficient of standard CFST arch bridge increased by 41.2%, and the rate of increase was the highest. The number of bracing continued to increase, while the improvement rate of stability coefficient decreased. The bracing built between the span of 1/4 and 5/8 can make the stability of CFST arch bridge achieve the best effect.

Key words: concrete-filled steel tubes arch bridge, the unified theory, stability analysis, ANSYS

中图分类号: 

  • TU318
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