摘要
考虑了三个不同的剪滞纵向位移差函数以反映薄壁箱梁不同宽度翼板的剪滞变化幅度,提出了一种能对工程中常用的变高度梯形截面箱梁剪力滞及剪切变形效应进行分析的方法。应用能量变分原理,导出了箱梁受横向荷载作用下的剪滞控制微分方程和边界条件,获得相应的闭合解,并探讨了不同纵向位移差函数对剪力滞的影响。最后通过高阶有限条法计算验证了本文方法的正确性。所得的公式比以往剪滞理论有了发展,因此更具有一般性。
In this paper, the shear lag and shear deformation effects are analyzed with a simple and efficient method, considering three longitudinal displacement differential functions for trapezoidal section box girder with varying depth. The governing differential equations and boundary conditions of the box girder under lateral loading are derived using energy-variational principle. The closed-form solutions of the equations are obtained and compared with the finite strip solutions. Good agreement is reached. The influences of three longitudinal displacement differential functions upon the shear lag are also discussed. It is shown that the present theory is effective and general.
出处
《工程力学》
EI
CSCD
北大核心
2003年第4期161-165,160,共6页
Engineering Mechanics
基金
国家自然科学基金资助项目(50005016)
航空科学基金资助项目
长江学者基金资助项目
关键词
薄壁箱梁
剪力滞效应
能量变分原理
剪切变形
thin walled box girder
shear lag effect
energy-variational principle
shear deformation
