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（中國電子工程設(shè)計(jì)院，北京100840）

［提要］北京銀泰中心工程塔樓A為63層的超高層鋼結(jié)構(gòu)，結(jié)構(gòu)總高度249.5m。工采用框架筒中筒結(jié)構(gòu)體系，并以伸臂桁架在三個(gè)設(shè)備層形成了加強(qiáng)層提高結(jié)構(gòu)的抗側(cè)剛度。工程在風(fēng)荷載和地震反應(yīng)譜的選取上做了較為充分的論證，設(shè)計(jì)中通過選擇延性較好的鋼材、加強(qiáng)第二道抗震防線、提高結(jié)構(gòu)在罕遇地震作用下的抗震性能及采取強(qiáng)節(jié)點(diǎn)弱構(gòu)件的構(gòu)造措施，使得結(jié)構(gòu)抗震性能有了較為可靠的保障。Pushover分析結(jié)果也表明結(jié)構(gòu)具有充足的抗震能力。

［關(guān)鍵詞］伸臂桁架；靜力彈塑性分析；流體阻尼器；能力譜；需求譜；屈強(qiáng)比

Structural Design of Super-high Steel Building of Beijing Yintai Center/Zhao Guangpeng, Li Peibin, Lü Zuochao，Lou Yu, Han Hejun, Huang Jian(China Electronics Engineering Design Institute, Beijing 100840, China)

Abstract:Steel building of Beijing Yintai Center is a super-high structure which has 63 floors with 249.5m total structural height. The tube-tube structure system is adopted and outtriggers are set in the three mechanical floors for strengthening floors. In selecting the wind load and seis-response spectra,there do much argumentation. The structural aseismatic capacity is ensured by selecting better ductile steel, reinforcing the second aseismatic line of defence, increasing aseismatic capacity under seldom occurred earthquake and using strong node and weak member conformation. The Pushover analysis indicates that the building has good aseismatic capacity.