摘要
按照常规的方法，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，内外筒的变形是协调的．然后用虚拟水平分布荷载来模拟由竖向荷载产生的Ｐ＿Δ效应，推导出结构的整体稳定微分方程，用Ｇａｌｅｒｋｉｎ法求解方程并获得整体结构的最小临界荷载．
The differential equation of the over_all stability and the minimum critical load of a tube_in_tube structure are derived and solved by Galerkin method, conventionally regarding its outer framed tube as the equivalent closed tube undergone bending and shear deformations and affected by the shear_slag, and regarding the deformations of the inner and outer tubes as to be compatible, and the P_Δ effects caused by vertical loads being imitated by horizontally distributed virtual loads.
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3期32-38,共7页
Journal of South China University of Technology(Natural Science Edition)
基金
广东自然科学基金
关键词
高层建筑
筒中筒结构
整体稳定
highrise building
tube_in_tube structure
over_all stability
