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（奧雅納工程顧問(wèn)， 北京 100020）

［摘要］北京CBD核心區(qū)某項(xiàng)目建筑高度約200m?；A(chǔ)設(shè)計(jì)中引入變剛度調(diào)平概念滿足主裙沉降差，減小筏板厚度和配筋。地上結(jié)構(gòu)采用鋼-混凝土組合結(jié)構(gòu)外框架和混凝土核心筒的雙重抗側(cè)力體系，結(jié)構(gòu)豎向未使用加強(qiáng)層。結(jié)合建筑設(shè)計(jì)要求并考慮施工難度，1～4層采用斜交鋼管混凝土柱，提高抗側(cè)剛度的同時(shí)緩解了底部墻肢拉應(yīng)力，5層及以上采用型鋼混凝土柱以降低用鋼量。對(duì)結(jié)構(gòu)進(jìn)行了靜力推覆分析，驗(yàn)證了結(jié)構(gòu)的塑性耗能機(jī)制和大震性能目標(biāo)。各項(xiàng)分析結(jié)果均滿足規(guī)范及超限審查要求，整體結(jié)構(gòu)安全可靠、經(jīng)濟(jì)合理。

［關(guān)鍵詞］超高層建筑； 組合結(jié)構(gòu)； 框架核心筒結(jié)構(gòu)； 靜力彈塑性分析； 舒適度分析

中圖分類號(hào)：TU318文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2017)14-0001-06

Structural design of a project in core area of Beijing CBD

Ma Chao,  Cheng Yu, Mak Kurtis,  Yang Yan,  Yang Mingliu,  Liang Yue,  Lu Keyu,  Liu Peng

（Arup, Beijing 100020， China）

Abstract:A building in core area of Beijing CBD has architectural height of 200m. The concept of variable rigidity leveling was introduced in the design of the foundation to meet the difference of the main building and podium building and to reduce the thickness and reinforcement of the raft. The upper structure adopts the dual lateral force resisting system consisting of steel-concrete composite structure outer frame and concrete corewall. Strengthening layer is not used in the structure. According to the requirements of architectural design and considering the difficulty of construction, oblique concrete-filled steel tubular column is adopted from the 1st to 4th layers, which improves the lateral stiffness while relieving tensile stress at the bottom of the wall. Steel reinforced concrete column is adopted at and above 5th layer to reduce the amount of steel usage. The Pushover analysis of the structure was carried out to verify plastic energy dissipation mechanism and performance objectives under rare earthquake. All the analysis results meet the requirements of specifications and out-of-code review, and the overall structure is safe, reliable and economical.

Keywords:super high-rise building; composite structure; frame corewall structure; Pushover analysis; serviceability analysis

作者簡(jiǎn)介：馬超，碩士，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email: Jecht.ma@arup.com。