薄壁截面剪切系数计算的平面薄壁单元法  

A Plane Thin-Walled Element Model Method for the Calculation of Shear Deformation Coefficients of Thin-Walled Section

作　　者：刘耀鹏 邢佳乐 白伦华 李帼昌[1] 丁乐扬 LIU Yaopeng;XING Jiale;BAI Lunhua;LI Guochang;DING Yueyang(School of Civil Engineering,Shenyang Jianzhu University,Shenyang l10168,China;NIDA Technology Company Limited,Hong Kong 999077,China;School of Transportation,Civil Engineering&.Architecture,Foshan University,Foshan 528225,China;Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University,Hong Kong 999077,China)

机构地区：[1]沈阳建筑大学土木工程学院,沈阳110168 [2]宁达科技有限公司,中国香港999077 [3]佛山科学技术学院交通与土木建筑学院,广东佛山528225 [4]香港理工大学土木及环境工程学系,中国香港999077

出　　处：《建筑钢结构进展》2023年第10期82-89,共8页Progress in Steel Building Structures

基　　金：广东省基础与应用基础研究基金(2022A1515110289);中国博士后科学基金(2021M691071)。

摘　　要：剪切系数对于准确计算大高跨比薄壁构件的力学响应至关重要。为实现薄壁截面剪切系数的高效计算,提出一种新的薄壁单元法。首先,介绍计算任意截面剪切系数的平面翘曲单元法,该方法以截面翘曲位移为自由度,通过能量原理进行求解。针对薄壁截面剪切系数,对薄壁板段引入忽略板厚方向翘曲位移不均匀性的假设,重新构造适宜快速建模及解算的一维薄壁单元。以2自由度薄壁单元为例,进行了程序实现。最后,采用ANSYS截面分析模块(基于平面翘曲单元法)与所提出的薄壁单元法分析了常用开口与开闭口薄壁截面的剪切系数,验证了所提出方法的准确性。Shear deformation coefficients are very important for predicting mechanical responses of thin-walled members with a large height-span ratio.To implement high efficiency in modeling and computations for shear correction coefficients,a new thin-walled element method was presented in this study.Firstly,the plane area element method for shear deformation coefficients of arbitrary sections was introduced,in which the warping displacement of a section was considered as a degree of freedom and solved via the energy principle.For the shear correction coefficients of thin-walled sections,based on the assumption that nonuniformly distributed warping displacements along the thickness of the plate were ignored,one-dimensional thin-walled element was established and added into a program.Finally,the ANSYS section analysis module was adopted for validating the proposed method while analyzing the shear deformation coefficients of complex open and open-closed sections.

关 键 词：薄壁截面 截面剪切系数 平面翘曲单元 薄壁单元 能量原理 

分 类 号：TU391[建筑科学—结构工程]