(1 上海建筑设计研究院有限公司, 上海 200041; 2 同济大学土木工程学院, 上海 200092)

摘要: 兰州环球港项目地处 8 度设防烈度区,超高层塔楼建筑顶部高度 317m,结构高度 248m. 考虑刚性伸臂引起的结构竖向刚度突变及普通阻尼伸臂耗能较小,在超高层塔楼中创新性地采用了带负刚度阻尼伸臂的钢框架-混凝土核心筒结构体系. 负刚度阻尼伸臂是在普通阻尼伸臂基础上增设负刚度装置而成,由于负刚度装置对运动的促进作用,阻尼器行程得到放大,其耗能效果也得到提高. 分析结果表明,采用负刚度阻尼伸臂后,结构的附加阻尼比得到显著提升,并以很少的阻尼器用量获得更好的降低位移和加速度的性能.

关键词: 兰州环球港; 负刚度阻尼伸臂; 黏滞阻尼器; 超高层结构; 减震; 高烈度地区

中图分类号:TU318 文献标志码:A 文章编号:1002-848X(2023)01-0065-06

DOI:10. 19701 / j. jzjg. SHY2307

Structural design of negative stiffness damped outrigger in Lanzhou Global Harbor

LIU Guiran1,2, ZHANG Xichen1, SUN Feifei2, LEI Zhenqun2, YANG Jiaqi2, CHEN Yun2

(1 Shanghai Institute of Architectural Design & Research Co. , Ltd. , Shanghai 200041, China;2 College of Civil Engineering, Tongji University, Shanghai 200092, China)

Abstract: Lanzhou Global Harbor project is located in the area with 8-degree fortification intensity. The top height of thesuper high-rise tower building is 317 meters, and the structural height is 248 meters. Considering the vertical stiffnesssudden change of the structure and the small energy dissipation of conventional damped outrigger caused by rigid outrigger,the steel frame-concrete core tube structural system with negative stiffness damped outrigger is innovatively adopted in thesuper high-rise tower. The negative stiffness damped outrigger is formed by adding a negative stiffness device on the basis ofthe conventional damped outrigger. Because the negative stiffness device promotes the movement, the stroke of the damperis amplified, and its energy consumption effect is also improved. The analysis result show that the additional damping ratioof the structure is significantly improved after the negative stiffness damped outrigger is adopted, and the performance ofreducing displacement and acceleration is better with a small amount of dampers.

Keywords:Lanzhou Global Harbor;negative stiffness damped outrigger; viscous damper; super high-rise structure; shockabsorption;areas of high intensity

∗“十四五”国家重点研发计划课题(2022YFC3801904).

作者简介:刘桂然,硕士,高级工程师,一级注册结构工程师,主要从事复杂超高层结构及减隔震技术的设计与研究,Email:liugr@ siadr. com. cn.

[引用本文] 刘桂然,张西辰,孙飞飞,等. 兰州环球港负刚度阻尼伸臂结构设计[J]. 建筑结构,2023,53(1):65-70,128. LIU Guiran,ZHANG Xichen,SUN Feifei,et al. Structural design of negative stiffness damped outrigger in LanzhouGlobal Harbor[J]. Building Structure,2023,53(1):65-70,128.