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(1 同濟(jì)大學(xué)建筑工程系, 上海 200092; 2 南京市建筑設(shè)計(jì)研究院有限責(zé)任公司, 南京 210037)
摘要: 由于建筑平面、立面上的需求,塔樓在底部存在較大收進(jìn)且結(jié)構(gòu)角部在中、高區(qū)逐層內(nèi)收,為避免過多的轉(zhuǎn)換結(jié)構(gòu)構(gòu)件,最終采用斜柱的方式滿足建筑要求;為解決結(jié)構(gòu)側(cè)向剛度不足的問題,設(shè)置了伸臂桁架加強(qiáng)層,是一個頗具有代表性的有較多斜柱的帶加強(qiáng)層超高層建筑結(jié)構(gòu). 以層間位移角為約束條件,基于增量敏感性優(yōu)化方法對伸臂桁架的位置及設(shè)置道數(shù)進(jìn)行研究分析,基于力學(xué)原理分析了斜柱結(jié)構(gòu)的受力機(jī)理,并對受其影響的鋼梁、樓板進(jìn)行專項(xiàng)分析,通過 ABAQUS 有限元軟件對分叉柱關(guān)鍵節(jié)點(diǎn)進(jìn)行有限元分析. 結(jié)果表明:在斜柱樓層范圍內(nèi),斜柱軸力產(chǎn)生的水平力在核心筒墻體內(nèi)會造成水平剪力,其拉、壓受力特性與斜柱傾斜方向相關(guān),應(yīng)重點(diǎn)對內(nèi)傾柱進(jìn)行加強(qiáng). 斜柱轉(zhuǎn)折處的樓板受到較大拉力時(shí)會發(fā)生開裂,因此鋼梁應(yīng)考慮能獨(dú)立承擔(dān)斜柱的水平分力,按拉、壓彎構(gòu)件進(jìn)行強(qiáng)度驗(yàn)算. 斜柱轉(zhuǎn)折樓層、伸臂加強(qiáng)層及其相鄰樓層,均為樓板應(yīng)力較大位置,設(shè)計(jì)中需重點(diǎn)關(guān)注及加強(qiáng). 通過專項(xiàng)分析加強(qiáng)后主體結(jié)構(gòu)能達(dá)到預(yù)定的性能目標(biāo),且結(jié)構(gòu)關(guān)鍵構(gòu)件在罕遇地震下不屈服,具有良好的延性.
關(guān)鍵詞: 超高層建筑; 斜柱; 伸臂桁架加強(qiáng)層; 抗震性能化設(shè)計(jì); 敏感性分析
中圖分類號:TU375 文獻(xiàn)標(biāo)志碼:A 文章編號:1002-848X(2023)02-0075-10
DOI:10. 19701 / j. jzjg. LS210179
Structural design of Ⅲ super high-rise building of Nanjing Deji Plaza
HU Daohang1,2
(1 Department of Building Engineering, Tongji University, Shanghai 200092, China; 2 Nanjing ArchitecturalDesign & Research Institute Co. , Ltd. , Nanjing 210037, China)
Abstract: Due to the requirements of the building plane and elevation, the tower has a large intake at the bottom and thecorner of the structure was drawn in storey by storey in the middle and high areas. In order to avoid excessive of thestructural transfer members, inclined columns are finally adopted to meet the architectural requirements. In order to solvethe problem of insufficient lateral stiffness of the structure, the use of an outrigger truss strengthen storey was adopted. It isa representative super high-rise building structure with reinforced story and more inclined columns. Based on theincremental sensitivity optimization method, the position and number of the outrigger truss were studied and analyzed underthe constraint of the story drifts. Based on the mechanics principle, the force mechanism of inclined column structure wasanalyzed, and the steel beams and slabs affected by inclined column were analyzed specially. The key nodes of thebifurcated column were analyzed by ABAQUS. The results show that within the range of the inclined column story, thehorizontal force generated by the inclined column axial force will cause horizontal shear force in the core wall, and thetensile and compressive force characteristics are related to the inclined direction of the inclined column, columns inclinedinward shall be strengthened with emphasis. The storey around the bend of the inclined column will crack when it receivesa large tensile force, so the steel beam should be considered to bear the horizontal component of the inclined columnindependently, and check the strength carrying capacity of the member under axial force and bending moment. The inclinedcolumn turning storey, outrigger truss strengthening story and its adjacent storey are all the places where the slab stress isrelatively large, so it needs to be focused and strengthened in the design. The main structure can reach the predeterminedperformance target after the above special analysis and the key components of the structure do not yield under the rareearthquake, and it has good ductility.
Keywords:super high-rise building; inclined column; outrigger truss strengthen story; performance-based seismic design;sensitivity analysis
第一作者:胡道航,碩士,工程師,一級注冊結(jié)構(gòu)工程師,主要從事超高層、復(fù)雜建筑結(jié)構(gòu)設(shè)計(jì),Email:290310207@ qq. com.
[引用本文] 胡道航. 南京德基廣場三期超高層建筑結(jié)構(gòu)設(shè)計(jì)[ J]. 建筑結(jié)構(gòu),2023,53 ( 2):75-84,91. HUDaohang. Structural design of Ⅲ super high-rise building of Nanjing Deji Plaza[J]. Building Structure,2023,53(2):75-84,91.
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