摘要
对于组合箱梁 ,在一定假设条件下根据组合翼板微元的变形协调和平衡条件 ,分别建立了横截面翼板和悬臂板的法向力微分方程。在两端简支的边界条件下采用分离变量法求解偏微分方程 ,得到用级数表示的应力解 ,然后根据剪力滞系数的定义即可得到组合箱梁翼板的剪力滞系数。通过算例验证了该近似方法能够满足工程实际的需要 。
A differential equation of longitudinal forces at transverse section and cantile ver flange is respectively constituted according to the compatibility of strain and the equilibrium of forces of composite box girder in certain conditions.The m ethod of variable-separating is used to solve the differential equation in simpl y supported boundary condition.The shear lag coefficient is determined by the r atio between stress calculated by this method and stress decided by elementary b eam theory.An example of such calculation method is given to approve its applica bility and the caculation is simple.
出处
《土木工程学报》
EI
CSCD
北大核心
2004年第9期37-40,共4页
China Civil Engineering Journal
关键词
组合箱梁
法向力
微分方程
剪力滞系数
composite beams
longitudinal stress
differential equati ons
shear lag coefficient
