- 摘 要
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（北京市建筑設(shè)計研究院有限公司， 北京 100045）
［摘要］通過對烏魯木齊寶能城282-4m超高層鋼結(jié)構(gòu)進行動力彈塑性時程分析，研究了結(jié)構(gòu)在大震下的動力響應(yīng)、結(jié)構(gòu)耗能分布及關(guān)鍵構(gòu)件的塑性發(fā)展。分析結(jié)果表明：在大震作用下，結(jié)構(gòu)的最大層間位移角小于規(guī)范限值；結(jié)構(gòu)底部6層及三個加強層伸臂布置的屈曲約束支撐（BRB）在大震下均進入屈服，導(dǎo)致結(jié)構(gòu)所承受的地震作用大幅下降，減小了結(jié)構(gòu)的地震反應(yīng)；由于在關(guān)鍵部位布置了BRB，給結(jié)構(gòu)提供了合理的剛度，地震下整體剛度下降較慢，主要抗側(cè)構(gòu)件極少進入屈服，框架柱基本未屈服；屈曲約束支撐和框架梁是結(jié)構(gòu)主要的耗能構(gòu)件，其中1～6層Y向BRB及10層伸臂桁架是BRB耗能的主要區(qū)域。
［關(guān)鍵詞］屈曲約束支撐； 超高層鋼結(jié)構(gòu)； 彈塑性分析
中圖分類號：TU391文獻標識碼：A文章編號：1002-848X(2016)17-0078-06
Dynamic elastic-plastic analysis of super high-rise steel structure for Baoneng in Urumchi
Zhou Zhongfa, Zhu Zhongyi, Wu Lianhong, Yuan Linhua, Bu Longgui, Xing Yuhui
(Beijing Institute of Architectural Design, Beijing 100045, China)
Abstract:The dynamic elastic-plastic time-history analysis was conducted on 282-4 meters high super high-rise steel structure for Baoneng in Urumchi to study the structure′s dynamic response, dissipating energy distribution and plastic development of key components under rare earthquake. Analysis results show that under rare earthquake, the maximum structural interlayer displacement angle is less than the standard limit. The buckling-restrained braces (BRBs) arranged at bottom six stories and in outriggers of three strengthening floors yield under rare earthquake to lead the greatly decrease of base shear force of the structure and reduction of the seismic response of the structure. Buckling-restrained braces arranged at key positions provide reasonable structural stiffness, so the overall stiffness decreases slowly, very few main lateral resistance members go into yield stage and the frame columns basically do not yield. The buckling-restrained braces and the frame beams are the basic energy dissipated components. BRBs in Y direction from 1 to 6 stories and outriggers at 10th story are the main energy dissipation areas.
Keywords:buckling-restrained brace (BRB)； super high-rise steel structure； elastic-plastic analysis
作者簡介：周忠發(fā)，碩士，工程師，Email：254149547@qq.com。
