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(中南建筑設(shè)計院股份有限公司, 武漢 430071)
摘要: 武漢江城之門為雙塔高位連體的門形超高層建筑,建筑高度 241. 9m,采用鋼管混凝土柱框架+核心筒+加強層+連體巨型跨層桁架結(jié)構(gòu)體系,核心筒角部及相交處內(nèi)嵌鋼骨,部分樓層內(nèi)嵌鋼板. 采用 SAP2000 軟件分別建立基于 CEB-FIP 90、CEB-FIP 2010、GL2000 理論的分析模型和無連體單塔模型,進行了考慮收縮徐變的非線性階段施工模擬分析,對比了典型豎向構(gòu)件變形和內(nèi)力重分布結(jié)果. 分析結(jié)果表明,伸臂桁架可有效平衡外框柱和核心筒的豎向變形差異;高位剛性連體的布置加大了外框柱和核心筒的豎向變形差異,其差異主要為彈性變形,收縮徐變引起的附加變形差異較小;混凝土收縮徐變帶來的豎向構(gòu)件軸力重分布表現(xiàn)為核心筒剪力墻卸載,外框柱和剪力墻內(nèi)嵌鋼骨加載,軸力變化最大值位于連體相鄰下部樓層;對伸臂桁架和腰桁架內(nèi)力影響主要體現(xiàn)為弦桿軸力的增大.
關(guān)鍵詞: 武漢江城之門; 大跨剛性連體結(jié)構(gòu); 超高層混合結(jié)構(gòu); 收縮徐變; 非線性施工模擬
中圖分類號:TU398. 2 文獻標志碼:A 文章編號:1002-848X(2023)08-0062-06
DOI:10. 19701 / j. jzjg. LS202029
Shrinkage and creep analysis of super high-rise hybrid structure with large-span rigid conjoined structure of River City Gate of Wuhan
ZHANG Shen, MENG Zhongyong, WANG Jie
(Central-south Architectural Design Institute Co. , Ltd. , Wuhan 430071, China)
Abstract: The River City Gate of Wuhan is a twin-tower high-position conjoined door-shaped super high-rise building withthe architectural height of 241. 9m. It adopts a concrete filled steel tube column frame + core tube + reinforcing layer +connected giant cross-layer truss structural system. Steel bones are embedded in the corners and intersection of the coretube, and steel plates are embedded in some floors. SAP2000 software was used to establish the analysis model and thenon-conjoined single tower model based on CEB-FIP 90, CEB-FIP 2010 and GL2000 theories. The non-linear constructionsimulation analysis considering shrinkage and creep was carried out, and the deformation and internal force redistributionresults of typical vertical members were compared. The analysis results show that the outrigger truss can balance the verticaldeformation difference between the outer frame column and the core tube effectively. The vertical deformation differencebetween the outer frame column and the core tube is increased by the arrangement of high-position rigid conjoined structure,and the difference is mainly elastic deformation, and the additional deformation caused by shrinkage and creep is small.The redistribution of axial force of vertical members caused by concrete shrinkage and creep is manifested as the unloadingof shear wall of core tube and the loading of steel bones embedded in the outer frame column and shear wall. The maximumvariation of axial force is located in the lower floors adjacent to the conjoined structure. The influence on the internal forceof outrigger truss and waist truss is mainly reflected in the increase of string axial force.
Keywords:River City Gate of Wuhan; large-span rigid conjoined structure; super high-rise hybrid structure; shrinkage andcreep; non-linear construction simulation
∗住房與城鄉(xiāng)建設(shè)部建設(shè)科技計劃項目(2017-K5-014).
第一作者:張慎,博士,教授級高級工程師,主要從事復雜結(jié)構(gòu)分析與研究,Email:zhangshen202@ 163. com.
[引用本文] 張慎,孟仲永,王杰. 武漢江城之門大跨剛性連體超高層混合結(jié)構(gòu)收縮徐變分析[J]. 建筑結(jié)構(gòu),2023,53(8): 62-67. ZHANG Shen, MENG Zhongyong, WANG Jie. Shrinkage and creep analysis of super high-rise hybridstructure with large-span rigid conjoined structure of River City Gate of Wuhan [ J]. Building Structure,2023,53 ( 8):62-67.
