截面形状对双肢薄壁墩温度场的影响分析

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摘要研究目的：置于自然环境下的高墩大跨混凝土结构，难免要受到日照温度荷载的作用，在这种荷载作用下，双肢薄壁墩会产生较大的温度应力与变形，严重的会引起墩身工程事故。本文以邢汾高速公路洺水大桥105.09 m高的双肢矩形薄壁空心墩为研究对象，利用ANSYS有限元软件的热分析及耦合分析功能，对不同截面形状的薄壁空心高墩在日照辐射作用下的温差效应进行仿真分析。
研究结论：计算结果表明：(1) 有限元软件ANSYS的热分析以及耦合分析功能可以很快速方便的计算双肢薄壁墩结构的温度场和温差效应；(2)温度应力随着截面边棱的增加而增加，而结构的变形却随着截面边棱的增加而减小；(3)温度应力的最大值一般在截面的角隅处出现；(4)在设计不同截面的双肢墩时，应综合考虑不同截面形状对温度应力以及变形的影响，选择合适的截面形状，使得高桥墩的温度裂缝控制在最小范围内；（5）该研究成果可以为薄壁高墩的设计和施工提供参考。

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关键词 ：双肢薄壁墩, 截面形状, 仿真分析, 温度效应

Abstract：Abstract：Research purposes： The concrete structures with high pier and long span placed on the natural environment, inevitably exposed to the direct sunlight temperature load effect, in this load, the double-limb thin-walled pier will have a greater temperature stress and deformation and cause serious engineering accident. This paper focuses on Mingshui bridge′s 105.09m double-limb and rectangular hollow pier of Xingtai-Fenyang Highway, using ANSYS finite element analysis software′s thermal analysis and coupled analysis, analyzes the temperature difference effect of the thin-walled hollow high pier with different cross-sectional shapes under the solar radiation in the simulation analysis.

Research conclusions：The results shows that: (1) ANSYS finite element analysis software′s thermal analysis and coupled analysis can calculate double-limb thin-walled pier′s temperature field and temperature difference effect. (2) Temperature stress increases with the section edges increasing, but the deformable structure decreases with the section edges increasing. (3) The maximum temperature stress in general appears at the corner of the section. (4) When design the double-limb piers in different sections, the effect of the different cross-sectional shapes on the temperature stress and deformation should be considered, and select the appropriate cross-sectional shape to make high bridge pier′s temperature cracks in minimum range. (5) The research results can provide a reference for design and construction of thin-walled high piers.

Key words： Key words: double-limb thin-walled pier cross-sectional shape simulation analysis temperature effect

作者简介: 张运波，1971年出生，男，副教授。

引用本文:

张运波蔡亭亭刘洋. 截面形状对双肢薄壁墩温度场的影响分析[J]. 铁道工程学报, 2015, 32(3): 41-.
ZHANG Yun-bo, CAI Ting-ting, LIU Yang . Effects Analysis of the Cross-sectional Shape on Double-limb Thin-walled Piers′ Temperature Field. 铁道工程学报, 2015, 32(3): 41-.

链接本文:

http://tdgcxb.crec.cn/CN/ 或 http://tdgcxb.crec.cn/CN/Y2015/V32/I3/41

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