薄壁闭口曲线箱梁在温度梯度下的平面外变形  

Out-of-plane deformation analysis of thin-walled closed curved box girder under temperature gradient

作　　者：杨则英[1] 赵凤金 张鹏 刘阳宇东 孙英琳 YANG Zeying;ZHAO Fengjin;ZHANG Peng;LIU Yangyudong;SUN Yinglin(School of Civil Engineering,Shandong University,Jinan 250061,Shandong,China;Jiyuan Jijin Expressway Co.,Ltd.,Jiyuan 454650,Henan,China)

机构地区：[1]山东大学土建与水利学院,山东济南250061 [2]济源市济晋高速公路有限公司,河南济源454650

出　　处：《山东大学学报（工学版）》2022年第1期47-57,共11页Journal of Shandong University（Engineering Science）

摘　　要：为计算薄壁闭口曲线箱梁由温度梯度引起的内力和位移,基于曲线梁的基本微分方程和最小能量原理,将一次扭转超静定简支曲线梁作为基本结构,考虑薄壁闭口曲线箱梁的翘曲效应,提出一种平面曲线梁温度变形简易解析计算方法。将解析计算结果与有限元计算结果进行对比验证,发现解析计算结果的相对误差小于5%,得出该解析计算方法在计算薄壁闭口曲线箱梁在温度梯度下的平面外变形时具有足够的精度。For calculating thin-walled closed curve box girder caused by temperature gradient of the internal force and displacement,based on the fundamental differential equation of the curve beam and the principle of minimum energy,a kind of plane curve beam temperature deformation simple analytical calculation method was put forward by setting a reverse statically indeterminate simply supported curve beam as basic structure and considering the warping effect of closed curve box girder.Compared with the finite ele-ment calculation results,the relative error of the analytical calculation results was less than 5%.It was concluded that the analytical method had sufficient accuracy in calculating the out-of-plane deformation of thin-walled closed curved box girder under temperature gradient.

关 键 词：薄壁曲线箱梁 翘曲效应 温度梯度 温度效应 基本微分方程 最小能量原理 解析法 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]