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 ,提出一种分析薄壁箱梁剪滞效应的高精度法。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 ,获得闭合解 ,通过高阶有限条法计算验证了本文方法的正确性。并探讨了不同纵向位移差函数对剪力滞的影响。
In this paper, we analyzed the shear lag an d shear deformation effects with a high precision method, considering three longit udinal displacement differential functions for trapezoidal section box girder wi th varying depth.The governing differential equations and boundary conditions of the box girder under lateral loading were derived from energy-variational prin ciple.The closed-form solutions of the equations were obtained and compared wi th numerical solutions of the finite strip method. The results are in good agree ment with numerical solutions of the finite strip method.The influences of three longitudinal displacement differential functions upon the shear lag are also di scussed.
出处
《机械科学与技术》
CSCD
北大核心
2003年第4期575-577,共3页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目 ( 50 0 0 50 16 )
航空科学基金项目
长江学者基金项目资助
关键词
剪滞效应
薄壁箱粱
能量变分法
剪切变形
Shear lag effect
Thin walled box girder
Ene rgy-variational method
Shear deformation
