摘要
本文提出了高层筒中筒结构的一种二阶分析方法．首先按Ｃｏｕｌ．Ａ的方法将筒中筒结构的外框筒连续化为具有弯曲变形和剪切变形，同时考虑其剪力滞后影响的等效实腹筒体，内筒只考虑其弯曲变形．然后用虚拟水平分布荷载来模拟由竖向荷载产生的二阶效应，根据内外筒的变形协调条件，导出筒中筒结构二阶分析的五阶常微分方程．最后采用有限差分法进行数值求解．
In this paper, a second order analysis procedure is presented for the analysis of tube_in_tube structures. Based on the Coull method and in view of the effect of flexural and shear deformations as well as the effect of shear lag, the outer framed_tube of the tube_in_tube structure is treated as an equivalent of a closed tube. Only flexural deformation is taken into account for the inner core tube. Then, regarding the second order effects as the effects of the virtual lateral distributed load, an ordinary differential equation of the second order analysis has been developed according to the compatibility condition of lateral deflections of the two tubes. The problem is finally solved by using the finite difference method.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1998年第8期78-85,共8页
Journal of South China University of Technology(Natural Science Edition)
关键词
筒中筒结构
水平分布荷载
二阶分析
高层建筑
tube_in_tube structure
virtual lateral distributed load
second order analysis
