| 薄壁钢箱梁自由扭转刚度和翘曲扭转刚度的计算 |
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| 引用本文： | 周奇,王仲启,于东民. 薄壁钢箱梁自由扭转刚度和翘曲扭转刚度的计算[J]. 汕头大学学报(自然科学版), 2014, 0(1): 65-72 |
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| 作者姓名： | 周奇 王仲启 于东民 |
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| 作者单位： | [1]汕头大学风洞实验室,广东汕头515063 [2]中交第一公路勘察设计研究院有限公司,陕西西安710065 |
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| 基金项目： | 基金项目：汕头大学科研启动项目（NTF12007）;国家自然科学基金项目（51308330）;桥梁结构抗风技术交通行业重点实验室开发课题（KLWRTBMC12-01） |
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| 摘 要： | 大跨度桥梁动力特性分析中主梁自由扭转刚度和翘曲扭转刚度的计算是个难点,本文介绍了利用ANSYS有限元软件计算扁平钢箱梁截面的扭转常数和翘曲常数的详细步骤,并给出了动力特性分析中计入翘曲扭转刚度的方法.通过实际算例验证了本文介绍的大跨度桥梁主梁扭转刚度计算方法的可行性,并指明了具体实施中的一些细节和技巧.
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| 关 键 词： | 桥梁工程 动力特性 自由扭转刚度 翘曲扭转刚度 三主梁模型 |
Calculation of Free Torsion Rigidity and Warpage Torsion Rigidity of Thin Wall Box Girder |
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| ZHOU Qi,WANG Zhong-qi,YU Dong-min. Calculation of Free Torsion Rigidity and Warpage Torsion Rigidity of Thin Wall Box Girder[J]. Journal of Shantou University(Natural Science Edition), 2014, 0(1): 65-72 |
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| Authors: | ZHOU Qi WANG Zhong-qi YU Dong-min |
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| Affiliation: | 1. Laboratory of Wind Tunnel, Shantou University, Shantou 515063, Guangdong, China; 2. First Institute and Company of Highway Survey and Design, Xi-an 710065, Shanxi, China) |
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| Abstract: | In analyzing dynamic characteristics of long span bridge, one of the difficulties is the calculation of free torsion rigidity and warpage torsion rigidity of thin wall box girder. In this paper, finite element software（ANSYS） is used to calculate the torsion constant in the cross section of fiat steel box girder, and the detailed steps are introduced. A new method is provided for using warpage torsion rigidity in the analysis of dynamic characteristics. The feasibility of calculation of torsion rigidity for long span bridges is verified by practical examples. Details and specific skills in implementation are demonstrated. |
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| Keywords: | bridge engineering dynamic characteristics free torsion rigidity warpagetorsion rigidity model of two primary beams |
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