考虑形心和剪心分离的变曲率箱梁弯扭分析  

Flexure-torsion Analysis of Variable-curvature-box Girder Considering Non-coincidence of Torsion Center and Gravity Center

作　　者：王银辉[1] 陈山林[1] 钱立[2] 

机构地区：[1]重庆大学土木工程学院 [2]中国市政工程西南设计研究院,四川成都610081

出　　处：《重庆建筑大学学报》2007年第3期66-69,共4页Journal of Chongqing Jianzhu University

基　　金：重庆市教委重点项目资助(020402)

摘　　要：为考虑曲梁剪心和形心分离和曲率变化对曲线箱梁的影响,针对具有竖直对称轴的矩形断面变曲率箱梁,推导了考虑曲梁剪心和形心分离情况下的平衡方程,然后通过箱梁内任一点的位移方程和内力-位移关系得到考虑曲梁剪心和形心分离的变曲率箱梁的挠曲扭转微分方程,最后得到回旋曲线箱梁的平衡微分方程及其伽辽金求解。In order to consider the effect of non-coincidence of torsion center and gravity center,the rectangular variable-curvature-box girder with vertical symmetrical axis is studied. Considering the influence of shear deflection and non-coincidence of torsion center and gravity center, the elastic equilibrium formulas are established. Based on deformation equations of the girder and the relations of inner forces and deformations,the flexure-torsion differential equations are developed. The equilibrium differential equations and Galerkin methods formulas for clothoid curved box girder are presented.

关 键 词：变曲率箱梁 形心 剪心 弯曲 扭转 畸变 微分方程 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]