伸臂桁架不同位置设置对中国建筑千米级摩天大楼的影响  

Impact of different arranged location of outriggers on 1000m-high skyscraper of CSCEC

作　　者：陈鹏[1] 陈勇[1] 吴一红[1] Chen Peng Chen Yong Wu Yihong(China Northeast Architectural Design ＆ Research Institute Co., Ltd., Shenyang 110006, China)

机构地区：[1]中国建筑东北设计研究院有限公司,沈阳110006

出　　处：《建筑结构》2017年第3期15-18,共4页Building Structure

基　　金：中建股份科技研发课题(CSCEC-2010-Z-01-02)

摘　　要：以高1 180m的中国建筑千米级摩天大楼为载体,在3个周边单塔+中央交通核每100m通过2层共15m高连接平台刚性连接的连接平台楼层、3个周边单塔上设置7种不同伸臂桁架方案,来研究伸臂桁架对结构刚度、刚重比、周期、楼层剪力、位移及框架承担剪力占基底剪力百分比等结构设计控制指标的影响。研究结果表明:伸臂桁架对结构的平动刚度影响较大,对扭转刚度影响较小;可显著提高结构整体刚度,增大结构的刚重比;伸臂桁架对结构的楼层剪力影响不大;可有效减小结构的楼层位移角,对这种巨型组合结构体系的底部加强部位框架承担剪力占基底剪力百分比的影响甚微。The 1 000m-high out-of-code high-rise building skyscraper has height of 1 180 m and it consists of 3 main surrounding towers and one central traffic tower which are rigidly connected by two stories 15m-high connected platform in every 100 m. Seven different types of outrigger schemes were set on the 3 surrounding towers,to study the influence of outriggers on structural design controlling parameters including structural rigidity,rigidity-to-gravity ratio,period,story shear forces,displacements,ratio of shear force carried by frames to total base shear force. The study results indicate that outriggers have large influence on structural planar displacement stiffness,while providing small influence on torsional stiffness. Outriggers can significantly increase the total stiffness of the whole structure,resulting in the increase of the rigidity-to-gravity ratio. Outriggers have small influence on story shear force and can effectively reduce the inter-story displacement angle. Outriggers have minimal impact on the ratio of shear force carried by frames in bottom strengthening part to total base shear force in mega composite structural system.

关 键 词：千米级摩天大楼 超限高层 巨型组合结构体系 伸臂桁架 刚重比 周期 

分 类 号：TU973[建筑科学—结构工程]