- 摘 要
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(華東建筑設計研究院有限公司, 上海 200002)
摘要: 南京江北 A1 地塊超高層項目的建筑高度為 499. 8m,采用帶伸臂桁架加強層的巨型拱支框架?核心筒結構.與已建成的超高層結構不同,本項目采用拱結構替代普通的環(huán)形桁架,實現(xiàn)了結構高效和建筑美觀的融合. 根據(jù)不同分區(qū)的結構布置和荷載,結合理論推導的合理拱軸線,以拱彎矩最小為設計原則確定了各分區(qū)的最優(yōu)拱形.采用緩粘結預應力技術實現(xiàn)拱結構推力的自平衡,降低巨柱的次彎矩. 對比了 K 形和 X 形伸臂桁架的結構效率,確定了最優(yōu)的伸臂桁架布置. 根據(jù)大震彈塑性分析結果,對加強層處核心筒墻體采取針對性加強措施. 對在核心筒內(nèi)采用 C80 高強混凝土的合理性進行了分析比較,可供類似超高層項目參考.
關鍵詞: 拱結構; 合理拱軸線; 預應力; 虛功原理; 高強混凝土
中圖分類號:TU391 文獻標志碼:A 文章編號:1002?848X(2022)10?0011?10
DOI:10. 19701 / j.jzjg.HDY2239
Structural design of super high?rise building in Nanjing Jiangbei A1 block based on theprinciple of mechanics
HUANG Yongqiang, ZHOU Jianlong, ZHANG Luo, LUO Yao, WANG Dasui,FU Jinshen, YANG Chengdong, CHEN Yingzhi
(East China Architectural Design & Research Institute Co., Ltd., Shanghai 200002, China)
Abstract: The height of super high?rise building in Nanjing Jiangbei A1 block is 499. 8m, which adopts a giant archsupported frame?core tube structure with outrigger truss reinforcement layer. Different from the existing super high?risestructure, this project adopts arch structure instead of ordinary belt truss, which realizes the integration of structuralefficiency and architectural beauty. According to the structural arrangement and load of different zones, combined with thereasonable arch axis derived from the theory, the optimal arch shape of each zone was determined by taking the minimumarch bending moment as the design principle. The unbonded prestressing technology was used to realize the self balance ofthe thrust of the arch structure and reduce the secondary bending moment of the giant column. The structural efficiency ofK?type and X?type outrigger trusses was compared, and the optimal layout of outrigger trusses was determined. According tothe elastic?plastic analysis results of large earthquakes, targeted strengthening measures were taken for the core tube wall atthe strengthening stroies. The rationality of using C80 high?strength concrete in core tube was analyzed, which can be usedas a reference for similar super high?rise projects.
Keywords:arch structure; reasonable arch axis; prestress; virtual work principle; high?strength concrete
∗十三五國家重點研發(fā)計劃項目(2018YFC0705800),“上海超高層建筑設計工程技術研究中心”建設項目(14DZ2252800),華建集團科研項目(19?1 類?0142?結).
第一作者:黃永強,碩士,高級工程師,主要從事超高層、鋼結構、減震結構和復雜結構設計,Email:hyq@ ecadi.com.
[引用本文] 黃永強,周建龍,張洛,等. 基于力學原理的南京江北 A1 地塊超高層結構設計[ J]. 建筑結構,2022,52(10):11?20. HUANG Yongqiang,ZHOU Jianlong, ZHANG Luo,et al. Structural design of super high?rise building inNanjing Jiangbei A1 block based on the principle of mechanics[J]. Building Structure,2022,52(10):11?20.
