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(江西省建筑設(shè)計(jì)研究總院集團(tuán)有限公司, 南昌 330046)

摘要: 南昌聯(lián)發(fā)中心 3#超高層塔樓采用現(xiàn)澆鋼筋混凝土框架-核心筒結(jié)構(gòu)體系,核心筒在高區(qū)單側(cè)收進(jìn)。 為滿足室內(nèi)凈空的設(shè)計(jì)要求,框架梁采用寬扁梁,核心筒墻肢采用跨高比較大的弱連梁連接。 弱連梁削弱了核心筒整體穩(wěn)定性,尤其在罕遇地震下承載力和延性較差,弱連梁較早破壞并喪失耗能性能。 核心筒單側(cè)收進(jìn)造成結(jié)構(gòu)剛心和質(zhì)心偏離、結(jié)構(gòu)扭轉(zhuǎn)、樓層剛度突變、承載力突變。 通過比選不同鋼骨混凝土連梁布置方案,得到耗能性能最優(yōu)的連梁布置方案,從而優(yōu)化了結(jié)構(gòu)整體受力性能。 分析結(jié)果表明:在關(guān)鍵樓層的關(guān)鍵位置布置鋼骨混凝土連梁可以解決弱連梁帶來的一系列問題,各項(xiàng)指標(biāo)滿足設(shè)計(jì)要求,也滿足室內(nèi)凈空的設(shè)計(jì)要求。

關(guān)鍵詞: 核心筒弱連梁; 核心筒單側(cè)收進(jìn); 鋼骨混凝土連梁; 雙框架梁

中圖分類號(hào):TU973 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2022)23-0062-07

DOI:10. 19701 / j. jzjg. 20220027

Design of super high-rise structure with weak coupling beam and core tube retracted on one side

DENG Shengxiang, DONG Jun, ZHAO Jun, WANG Hui

(Architectural Design and Research Institute of Jiangxi Province, Nanchang 330046, China)

Abstract: 3 # super high-rise tower of Nanchang Lianfa Center adopts cast-in-place reinforced concrete frame-core tubestructure system, the core tube is retracted on one side of the high area. In order to meet the design requirements of indoorclearance, the frame beam is wide flat beam, and the core tube wall limb is connected by weak coupling beam with largespan height ratio. Weak coupling beams weaken the overall stability of the core tube, especially under rare earthquakes,the bearing capacity and ductility are poor, and weak coupling beams fail earlier and lose energy dissipation performance.The core tube retracted on one side causes the deviation of the structural stiffness center and the mass center, the structuraltorsion, the sudden change of the floor stiffness, and the sudden change of the bearing capacity. By comparing andselecting different steel reinforced concrete coupling beam layout schemes, the coupling beam layout scheme with the bestenergy dissipation performance was obtained, so as to optimize the overall mechanical performance of the structure. Theanalysis results show that the arrangement of steel reinforced concrete coupling beams at key positions of key floors can solvea series of problems caused by weak coupling beams, and all indicators meet the design requirements, as well as the designrequirements of indoor clearance.

Keywords:core tube weak coupling beam; core tube retracted on one side; steel reinforced concrete coupling beam;double frame beam

第一作者:鄧聲祥,學(xué)士,高級(jí)工程師,一級(jí)注冊(cè)結(jié)構(gòu)工程師,主要從事結(jié)構(gòu)設(shè)計(jì)工作,Email:113523855@ qq. com。

[引用本文] 鄧聲祥,董軍,趙軍,等. 帶弱連梁且核心筒單側(cè)收進(jìn)的超高層結(jié)構(gòu)設(shè)計(jì)[ J]. 建筑結(jié)構(gòu),2022,52(23):62-68,77 DENG Shengxiang,DONG Jun,ZHAO Jun,et al. Design of super high-rise structure with weak couplingbeam and core tube retracted on one side[J]. Building Structure,2022,52(23):62-68,77.