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(1 上海建筑設(shè)計(jì)研究院有限公司, 上海 200041; 2 同濟(jì)大學(xué)土木工程學(xué)院, 上海 200092)

摘要: 蘭州環(huán)球港項(xiàng)目地處 8 度設(shè)防烈度區(qū),超高層塔樓建筑頂部高度 317m,結(jié)構(gòu)高度 248m. 考慮剛性伸臂引起的結(jié)構(gòu)豎向剛度突變及普通阻尼伸臂耗能較小,在超高層塔樓中創(chuàng)新性地采用了帶負(fù)剛度阻尼伸臂的鋼框架-混凝土核心筒結(jié)構(gòu)體系. 負(fù)剛度阻尼伸臂是在普通阻尼伸臂基礎(chǔ)上增設(shè)負(fù)剛度裝置而成,由于負(fù)剛度裝置對運(yùn)動(dòng)的促進(jìn)作用,阻尼器行程得到放大,其耗能效果也得到提高. 分析結(jié)果表明,采用負(fù)剛度阻尼伸臂后,結(jié)構(gòu)的附加阻尼比得到顯著提升,并以很少的阻尼器用量獲得更好的降低位移和加速度的性能.

關(guān)鍵詞: 蘭州環(huán)球港; 負(fù)剛度阻尼伸臂; 黏滯阻尼器; 超高層結(jié)構(gòu); 減震; 高烈度地區(qū)

中圖分類號:TU318 文獻(xiàn)標(biāo)志碼:A 文章編號: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”國家重點(diǎn)研發(fā)計(jì)劃課題(2022YFC3801904).

作者簡介:劉桂然,碩士,高級工程師,一級注冊結(jié)構(gòu)工程師,主要從事復(fù)雜超高層結(jié)構(gòu)及減隔震技術(shù)的設(shè)計(jì)與研究,Email:liugr@ siadr. com. cn.

[引用本文] 劉桂然,張西辰,孫飛飛,等. 蘭州環(huán)球港負(fù)剛度阻尼伸臂結(jié)構(gòu)設(shè)計(jì)[J]. 建筑結(jié)構(gòu),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.