Abstract: Based on the summerization of the analysis of thin-walled box curved girder,the generalized displacement method of thin-walled box curved girder is established in this paper.The quintic polynomial displacement function for curved girder and the analytical relation between the warping torsion and deformation of the box section are presented.Two numerical examples are used to demonstrate the application and correctness of this method.

Key words: thin-walled box girder, curved beam, generalized displacement, war ping effect

摘要： 本文在总结箱型曲梁结构分析研究的基础上,在有限元分析中引入广义位移概念,建立了具有高次多项式的曲梁单元形状函数和箱型截面的翘曲扭矩与变形的解析关系,利用静力凝聚方法建立了箱型曲梁结构分析的广义位移方法,从而使得这类结构的计算分析得到一定的简化,满足了工程需要。算例结果表明:本文提出的方法概念明确,计算精度和效率较高,适合于一般杆系和箱型结构的分析和计算。

关键词: 薄壁曲梁, 曲梁, 广义位移, 翘曲效应