屈曲約束支撐在北京銀泰中心結(jié)構(gòu)抗震設(shè)計中的應(yīng)用
李培彬，婁宇，趙廣鵬，韓合軍，呂佐超，黃健
- 摘 要
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（中國電子工程設(shè)計院，北京100840）［提要］北京銀泰中心鋼結(jié)構(gòu)主樓為框架筒中筒結(jié)構(gòu)，為了加強(qiáng)其抗側(cè)剛度，除了在各層以鋼梁連接內(nèi)外筒，還在3個設(shè)備層設(shè)置了貫通內(nèi)外筒的伸臂桁架形成加強(qiáng)層。由于伸臂桁架對結(jié)構(gòu)整體抗震性能有較為突出的影響，因此將伸臂桁架在內(nèi)、外筒之間的鋼支撐用屈曲約束支撐代替，以改善其力學(xué)性能。通過合理選擇屈曲約束支撐的力學(xué)參數(shù)，并經(jīng)過Pushover分析計算，表明該屈曲約束支撐的設(shè)置能夠改善結(jié)構(gòu)的整體抗震性能，達(dá)到了預(yù)期目的。［關(guān)鍵詞］北京銀泰中心；振動控制；屈曲約束支撐（UBB）；Pushover分析Using Unbonded Braces in Aseismatic Design for Steel Tower of Beijing Yintai Center/Li Peibin, Lou Yu, Zhao Guangpeng, Han Hejun, Lü Zuochao, Huang Jian(China Electronics Engineering Design Institute, Beijing 100840, China)Abstract:Beijing Yintai Center steel tower is a frame tube and tube structure. For increasing lateral stiffness，trusses are set in the three mechanical floors of the building between outer tube and inner tube besides fixing connecting steel beams in every floor,so reinforced layers are formed. Because of the important status of the trusses for the transferring seismic load, the steel braces in trusses between the outer and inner tube are replaced by unbonded braces. By selecting right mechanics parameters of the unbonded braces, the Pushover computing results show that the unbonded braces could improve aseismatic capacity of the building.Keywords:Beijing Yintai Center; vibration control; unbonded brace; Pushover analysis
