筒中筒结构在竖向地震作用下的整体稳定分析  

Analysis of the Overall Stability of Tube in tube Structures Under Vertical Seismic Action

作　　者：梁启智[1] 傅赣清[1] 

机构地区：[1]华南理工大学建筑工程系,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2000年第1期60-64,共5页Journal of South China University of Technology(Natural Science Edition)

摘　　要：本文根据内、外筒变形协调条件建立结构的整体稳定方程.考虑竖向地震作用影响,分别计算了设防烈度7度、8度和9度的小震情况下,相对于楼层重力荷载的临界荷载因子pcr.计算结果表明:竖向地震作用对筒中筒结构的整体稳定影响显著.考虑竖向地震作用后,临界荷载因子值pcr减小,当设防烈度为9度,pcr值减小约20.19%By the compatibility of deformation of the two tubes, the equation of the overall stability of a tube in tube structure is set up. This paper computes the p cr —the values of the critical load factor of the overall stability of the structure under vertical seismic action of mode earthquake intensity corresponding to 7, 8 and 9 degrees of earthquake intensity. The result indicates that the vertical seismic action greatly affects the overall stability of the structure by decreasing the value p cr . The value p cr decreases by 20.19% when the earthquake intensity is 9 degrees.

关 键 词：筒中筒结构 竖向地震作用 整体稳定 高层建筑 

分 类 号：TU973.17[建筑科学—结构工程]