(1 华东建筑设计研究院有限公司, 上海 200002； 2 上海超高层建筑设计工程技术研究中心, 上海 200002)

［摘要］随着高层建筑的广泛设计和建造，出现了一些核心筒偏离结构平面中心位置的框架-核心筒结构，可称为核心筒偏置结构。在承受水平地震作用和竖向荷载时, 此类结构的受力性能与非偏置的框架-核心筒结构有所不同。通过理论分析，研究了核心筒偏置高层建筑结构的扭转位移比和扭转周期比的变化；采用数值分析的方法，从结构和构件两个层面研究了不同高宽比、不同偏置距离的24个模型的受力性能。在结构整体层面总结了扭转周期比、扭转位移比等结构指标随偏置程度、结构高度及是否有内柱等因素的变化规律；在构件层面总结了不同偏置程度对墙柱剪力的影响程度，为此后该类结构的设计提供参考。

［关键词］核心筒偏置； 高层建筑； 受力性能； 扭转效应

中图分类号：TU318文献标识码：A文章编号：1002-848X(2019)13-0001-06

Analysis on mechanical characteristics of eccentric high-rise frame-core tube structures

Zhou Jianlong1,2, Qian Peng1,2, Bao Lianjin1,2, An Dongya1,2, Qiu Jieyao1,2, Yan Congzhi1,2, Pan Suchen1,2

(1 East China Architectural Design & Research Institute, Shanghai 200002, China; 2 Shanghai Engineering Technology Research Center of Super High-rise Building Design, Shanghai 200002, China)

Abstract:Along with the extensive design and construction of high-rise buildings, a kind of frame-core tube structure with the characteristic of an eccentric core tube appeared. This kind of structure is called eccentric frame-core tube structure. Eccentric frame-core tube structures differ from ordinary frame-core tube structures when subjected to lateral seismic effects and gravity loads. Through theoretical analysis, the variation of torsional displacement ratio and torsional period ratio of eccentric high-rise frame-core tube structure. By using numerical analysis method, the mechanical characteristics of 24 models with different aspect ratio and different eccentric distance were researched from  structure and component aspects. At the overall structure level, the influence of eccentric level, structure height, and internal columns on structural indexes such as torsional period ratio and torsional displacement ratio were presented. At the component level, the influence of different eccentric level on the shear force of shear wall and column was summarized, providing reference for future design of this kind of structures.

Keywords:eccentric frame-core tube; high-rise building; mechanical characteristics; torsional effect