超高层框架-核心筒结构中的外框柱截面形状对结构侧移影响的分析

Analysis of the Impact of Perimeter Column Section Shapes to Lateral Displacement of High-rise Frame-corewall Structure

本文以一个有代表性的超高层框架-核心筒结构工程为实例,在其他条件相同的情况下,改变其外框柱的截面形状进行结构计算,分析其对结构侧移的影响程度,研究表明采用长方形柱截面更有利于控制结构侧移,但其影响程度有限。当框架-核心筒结构中的核心筒能提供足够的侧向刚度时,结构专业不必介意其外框柱的截面形状选择。

Through a representative project case of super high-rise frame-corewall building,an analysis is carried out by changing the section shape of perimeter columns to assess the impact to lateral displacement of the structure.The analysis indicates that rectangular cross section of the perimeter columns is more beneficial than square ones to control the lateral displacement of the structure,but the effect is extremely limited.Consequently,the section shape of the perimeter columns should be ignored by structure engineers,when the core tube provides enough lateral rigidity.