带偏心支撑钢框架-混凝土核心筒结构抗震性能研究
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摘要
在高层钢框架-混凝土核心筒结构的外钢框架部分加设多列式并连偏心支撑、多列帽腰连偏心支撑,采用结构分析与设计的通用有限元分析软件对未设支撑、设置偏心支撑、改变偏心支撑的位置和数量的高层钢框架-混凝土核心筒结构的地震反应特性进行了分析.利用振型分解反应谱法对该结构的自振周期、结构侧移、层间位移角、倾覆力矩比、各层总剪力、各层总弯矩、钢框架承担的剪力及剪力调整系数等指标进行了研究.根据分析结果提出了高层钢框架-混凝土核心筒结构抗震设计的偏心支撑分布方式和帽腰支撑设置的原则,为实际工程设计提供了理论参考.
Several additional parallel out eccentrical braces and cap connection or waist connection eccentrical braced were considered in thehigh-rise structure system.The seismic response properties of the system for three models: the one without braces,the one with eccentrical braces,and the one with eccentrical braces in the location and number,were carried out through general finite element software.The vibration mode decomposition spectrum of the structure was carried out through the analysis of the natural vibration period,the displacement,the inter-story drift angle,the ratio of overturning moment,the total shear for each floor,the total moment for each floor,the shear undertaken by steel framework, the shear adjustment factor and other indicators.The results provide a reference for the design of the distribution of several additional parallel out eccentrical braces and the set-up of the cap connection or waist connection eccentrically braced of steel frame-concrete core tube structure in the future.
Several additional parallel out eccentrical braces and cap connection or waist connection eccentrical braced were considered in thehigh-rise structure system.The seismic response properties of the system for three models: the one without braces,the one with eccentrical braces,and the one with eccentrical braces in the location and number,were carried out through general finite element software.The vibration mode decomposition spectrum of the structure was carried out through the analysis of the natural vibration period,the displacement,the inter-story drift angle,the ratio of overturning moment,the total shear for each floor,the total moment for each floor,the shear undertaken by steel framework, the shear adjustment factor and other indicators.The results provide a reference for the design of the distribution of several additional parallel out eccentrical braces and the set-up of the cap connection or waist connection eccentrically braced of steel frame-concrete core tube structure in the future.
引文
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[3]中华人民共和国建设部.JGJ 3—2002/J 186—2002高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2002.Ministry of Construction of the People’s Republic of China.JGJ3—2002/J 186—2002 Technical specification for concrete struc-tures of tall building[S].Beijing:China Architecture&BuildingPress,2002.(In Chinese)
[4]福州大学.DBJ 13—61—2004钢-混凝土混合结构技术规程[S].福州:福建省建筑标准设计办公室,2004.Fuzhou University.DBJ 13—61—2004 Technical specificationfor steel-concrete mixed structures[S].Fuzhou:Building StandardDesign Office of Fujian Province,2004.(In Chinese)
[5]SUBHASH C G.United states-Japan cooperative earthquake en-gineering research program on composite and hybrid structures[J].J Struct Eng,2004(2):157-158.
[6]FRANKLIN Y C.Inelastic analysis of 3-D mixed steel and rein-forced concrete seismic building systems[J].Computers&Struc-tures,1981,13(1/3):189-196.
[7]RICHARD J Y.Advanced inelastic analysis of thin-walled core-bracedframes[C]//Singapore Reference of APEC,1997:485-500.
[8]蔡益燕.高层民用建筑钢结构技术规程修订雏议[J].建筑钢结构进展,2003,5(4):1-4.CAI Yi-yan.An envisage on revision of“Technical Specificationfor Steel Structure of Tall Buildings”[J].Progress in Steel Build-ing Structures,2003,5(4):1-4.(In Chinese)
[9]周学军,陈鲁,曲慧.多高层钢结构支撑的布置方式对框架侧向刚度的影响[J].钢结构,2003,18(4):51-54.ZHOU Xue-jun,CHEN Lu,QU Hui.Effects of layout of braces formultistory and high-rise steel structures on lateral stiffness of frames[J].Steel Construction,2003,18(4):51-54.(In Chinese)
[10]黄怡,王元清,石永久.支撑布置方式对多高层钢结构抗震性能的影响分析[J].钢结构,2005,20(5):41-44.HUANG Yi,WANG Yuan-qing,SHI Yong-jiu.Analysis of seis-mic behaviors of multi-storey and high-rise steel structures withdifferent layout of braces[J].Steel Construction,2005,20(5):41-44.(In Chinese)
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