截面形状对双肢薄壁墩温度场的影响分析

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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

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http://tdgcxb.crec.cn/EN/ OR http://tdgcxb.crec.cn/EN/Y2015/V32/I3/41

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