| 一种剪力滞效应分析的薄壁箱梁单元 |
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| 引用本文： | 韦成龙,刘小燕,曾庆元.一种剪力滞效应分析的薄壁箱梁单元[J].长沙交通学院学报,2000,16(2):57-61. |
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| 作者姓名： | 韦成龙 刘小燕 曾庆元 |
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| 作者单位： | 1. 长沙铁道学院,湖南,长沙,410007
2. 长沙交通学院,湖南,长沙,410076 |
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| 基金项目： | 湖南省自然科学基金;; |
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| 摘 要： | 用多个不同的纵向位移差值函数自动计入翼板宽度及其至截面形心距离对剪滞翘曲幅度的影响，并考虑轴力平衡条件，构造薄壁箱梁（可蜕变为开口截面梁）的翘曲位移函数，通过对普通杆件增加相应的节点位移参数，导出了剪力滞分析的薄壁箱梁单元刚度矩阵。计算结果和已有文献的实验结果吻合良好，表明方法是可行的。
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| 关 键 词： | 剪力滞 薄壁箱梁 翘曲 有限元 |
A New Kind of Thin-walled Box Girder Element for the Analysis of Shear Lag Effect |
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| WEI Cheng-long,LIU Xiao-yan,ZENG Qing-yuan.A New Kind of Thin-walled Box Girder Element for the Analysis of Shear Lag Effect[J].Journal of Changsha Communications University,2000,16(2):57-61. |
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| Authors: | WEI Cheng-long LIU Xiao-yan ZENG Qing-yuan |
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| Abstract: | In
the paper, the influence on the axial stress distribution due to variation of both the
width of component plates of the flanges and their distances to the neutral axis is taken
into account to form a warping displacement function for box girder. A new kind of
thin-walled box girder element for the analysis of shear lag effect is presented. The
stiffness matrix of the element is derived from the theory of minimum potential energy.
Comparing the calculation results with those obtained from the model test and the other
methods, the method proposed in this paper is proved to be exact as well as simple. |
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