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(中國建筑設(shè)計研究院 北京 100044)
［提要］ 中關(guān)村金融中心超高層鋼結(jié)構(gòu)建筑的平面、立面布置復(fù)雜。在設(shè)計中采用鋼框架支撐結(jié)構(gòu)體系，合理設(shè)置鋼混凝土組合結(jié)構(gòu)過渡層。在高層建筑結(jié)構(gòu)設(shè)計中首次采用按冶金建筑標(biāo)準(zhǔn)生產(chǎn)的Q345GJ鋼材。在避難層采用桁架將豎向支撐連為一體，有效地增大了結(jié)構(gòu)的側(cè)向剛度，減小側(cè)向位移。采用4層高的折線形柱實(shí)現(xiàn)建筑立面的變化，相應(yīng)設(shè)置樓層水平桁架以改善折線柱水平分力的傳遞。采用大位移滑動支座，解決連廊與主樓的變形差異問題。將樁基礎(chǔ)改為天然地基基礎(chǔ)，方便施工，有效地縮短了工期、降低了造價。
［關(guān)鍵詞］ 高層鋼結(jié)構(gòu) 框架支撐體系 組合結(jié)構(gòu) 滑動支座 折線形柱 基礎(chǔ)
Key Techniques for Design of the Highrise Steel Structure of Zhongguancun Financial Center Tower/Hu Chunyang，F(xiàn)an Zhong，Chen Fusheng，Shen Lin，Yu Yinquan(China Architecture Design and Research Group,Beijing 100044,China)
Abstract:The plan and facade layout of the highrise steel structure of Zhongguancun financial center tower is very complicated.The steel framebracing structural system is adopted and the steelconcrete composite transition floors are used reasonably.Q345GJ steel with excellent properties is used for the first time in the highrise building.In refuge floors,adjacent bracingframes are connected together for increasing the lateral stiffness of the structure and reducing interstory rotation displacement.The every four levelkinky line outer columns are adopted for the satisfying the demand for architectural faade profile,manufacture and construction easily.Floor horizontal trusses arranged at outer column  bending level for increasing the diaphragm stiffness of the floor slab.Largedisplacement sliding bearings are used to solve the differential displacement between the bridgeway and the tower.Changed pile foundation scheme into raft foundation scheme saved the cost and minimized construction period significantly.
Keywords:highrise steel structure;framebracing system;composite structure;sliding bearing;kinky line column;foundation