筒中筒结构设置刚性层效果分析

Effectiveness of Outriggers in Tube in tube Structures

通过对某４８层筒中筒结构在３５层处设置刚性层效果的计算分析，提出筒中筒结构设置刚性层的作用机理在于提高翼缘框架的抗侧作用。

Outriggers are often used in tall buildings to reduce the lateral displacement and drift. In China, in recent years,many tall structures have utilized outriggers. It is effective and economic especially for tall frame wall structures. However, in tube in tube structures, less effective can be found in practice. In order to show the mechanism and the effect of outriggers in tube in tube structures, a series of 3D analyses were conducted and the main results are given in this paper. The effect of outriggers in tall structures reduces with the increasing of the lateral stiffness of the perimeter frame, which in turn depend on the spandrel beams.