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（華建集團(tuán)華東建筑設(shè)計(jì)研究總院， 上海 200002）
［摘要］某超高層鋼結(jié)構(gòu)采用鋼框架+鋼支撐筒結(jié)構(gòu)體系，并采用了屈曲約束支撐（BRB）和鋼連梁作為消能構(gòu)件。塔樓由5個避難層自下而上分成編號為Ⅰ～Ⅵ六個分區(qū)。通過改變六個分區(qū)消能構(gòu)件的布置情況，設(shè)計(jì)了多種消能減震方案。通過對不同消能減震方案進(jìn)行罕遇地震彈塑性時程分析，比較結(jié)構(gòu)層間位移角、頂點(diǎn)位移、能量耗散及構(gòu)件損傷等指標(biāo)，總結(jié)了屈曲約束支撐的布置區(qū)域及消能構(gòu)件（BRB和鋼連梁）的屈服承載力等因素對結(jié)構(gòu)減震性能的影響。結(jié)果表明：在Ⅰ～Ⅱ區(qū)布置BRB和鋼材等級為Q345的高屈服承載力鋼連梁，以上各區(qū)布置鋼材等級為Q235的低屈服承載力鋼連梁的消能構(gòu)件布置方案減震效率高，且相對經(jīng)濟(jì)合理。
［關(guān)鍵詞］超高層鋼結(jié)構(gòu)； 消能減震； 彈塑性分析； 屈曲約束支撐； 鋼連梁； 構(gòu)件損傷
中圖分類號：TU318+.1, TU391文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2020)18-0115-07
Optimal design of energy dissipation scheme for a super high-rise steel structure apartment
LI Lishu, CHEN Guangyuan, BAO Lianjin
（Arcplus Group PLC East China Architectural Design & Research Institute, Shanghai 200002, China）
Abstract:Steel frame+steel braced core system was adopted in a super high-rise structure which used buckling restrained braces(BRB) and steel coupling beam as energy dissipation component. Tower was divided into six regions numbered fromⅠ to Ⅵ from the bottom up by five refuge floors. By changing the layout of the six partition energy dissipation components, a variety of energy dissipation schemes had been designed. Through the elastoplastic time history analysis of rare earthquakes for different energy dissipation schemes, and comparing structural interlayer displacement angle, vertex displacement, energy dissipation and component damage and other indicators, the influence of the layout area of buckling restraint supports and energy dissipating components such as the yield capacity of BRB and steel coupling beams on the shock absorption performance of the structure and other factors were summarized. The results show that BRB and high-yield steel coupling beams with steel grade Q345 are arranged in zones Ⅰ～Ⅱ, and the energy dissipation component arrangement scheme of low-yield steel coupling beams with steel grade Q235 in the above areas has high shock absorption efficiency in energy dissipation and economic relatively.
Keywords:super high-rise steel structure; energy dissipation; elastoplastic analysis; buckling restrained braces; steel coupling beams; component damage
作者簡介：┣李立樹，碩士，高級工程師，Email:lishu_li@ecadi.com。
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