组合框架-核心筒结构地震反应初步规律研究
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摘要
对外部由钢管混凝土柱和钢-混凝土组合梁组成的组合框架,内部为RC核心筒的305个组合框架-核心筒结构进行了弹性地震反应的参数分析,初步探讨了外框架梁、柱截面、核心筒厚度及楼层数变化对结构变形性能和外框架剪力的影响规律.研究了结构刚度特征值对最大层间位移角位置和外框架楼层最大剪力位置的影响规律.结果表明:对于该结构模型,单独增大柱截面对减小结构位移反应效果不明显,同时增大梁、柱尺寸或核心筒厚度均可有效降低结构的弹性位移反应.随着核心筒厚度的增加,外框架承担的剪力和剪力分担率减小,在结构中上部减小比率较大.结构最大层间变形和框架剪力起控制作用的是中上部楼层.
A parametric analysis of elastic seismic response of 305 composite frame-RC core wall structures with the inner part of RC core walls and the outer part of concrete-filled square steel tubular columns and steel-concrete composite beams was carried out.The effects of dimensions of beams and columns,thickness of RC core walls and number of stories on the deformation and mechanical behaviors of the structures were preliminarily investigated.The influences of the characteristic values of the structural stiffness on the locations of the maximum storey drift angle and the outer frame shear force are studied.The conclusions are drawn that for the proposed structural model,only enlarging the dimension of the columns has no obvious effects on the decrease of the structural displacement response.While enlarging the dimensions of the columns and the beams simultaneously or the thickness of the core walls can effectively reduce the elastic seismic displacement response.With the increase of the thickness of the core walls,shear force and force distribution rates of the outer composite frame decrease and the decrease ratio is larger especially in the middle and upper parts of the structures.Accordingly,the control storey of the maximum storey deformation and the outer frame shear force is in the middle and upper parts of the structures.
A parametric analysis of elastic seismic response of 305 composite frame-RC core wall structures with the inner part of RC core walls and the outer part of concrete-filled square steel tubular columns and steel-concrete composite beams was carried out.The effects of dimensions of beams and columns,thickness of RC core walls and number of stories on the deformation and mechanical behaviors of the structures were preliminarily investigated.The influences of the characteristic values of the structural stiffness on the locations of the maximum storey drift angle and the outer frame shear force are studied.The conclusions are drawn that for the proposed structural model,only enlarging the dimension of the columns has no obvious effects on the decrease of the structural displacement response.While enlarging the dimensions of the columns and the beams simultaneously or the thickness of the core walls can effectively reduce the elastic seismic displacement response.With the increase of the thickness of the core walls,shear force and force distribution rates of the outer composite frame decrease and the decrease ratio is larger especially in the middle and upper parts of the structures.Accordingly,the control storey of the maximum storey deformation and the outer frame shear force is in the middle and upper parts of the structures.
引文
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[2]韩林海,杨有福.现代钢管混凝土结构技术[M].北京:中国建筑工业出版社,2007.
[3]聂建国,樊健生.广义组合结构及其发展展望[J].建筑结构学报,2006,27(6):1-8.(NIE Jian-guo,FAN Jian-sheng.Thedevelopment and prospect of generalized composite structures[J].Journal of Building Structures,2006,27(6):1-8.(in Chinese))
[4]HAN Lin-hai,LI Wei,YANG You-fu.Seismic behaviour of concrete-filled steel tubular frame to RC shear wall high-rise mixed structures[J].Journal of Constructional Steel Research,2009,65(5):1249-1260.
[5]侯光瑜,陈彬磊,苗启松,等.钢-混凝土组合框架-核心筒结构设计研究[J].建筑结构学报,2006,27(2):1-9.(HOU Guang-yu,CHEN Bin-lei,MIAO Qi-song,et al.Design and research on composite steel and concrete frame-core wall structure[J].Journal ofBuilding Structures,2006,27(2):1-9.(in Chinese))
[6]刘阳冰,刘晶波,闫秋实.钢-混凝土组合框架-钢筋混凝核心筒结构抗震性能分析[C]//福州:第四届全国抗震减灾工程学术研讨会,2008.
[7]LIU Jing-bo,LIU Yang-bing.Seismic behavior analysis of steel-concrete composite frame structure systems[C]//Beijing:14th WorldConference on Earthquake Engineering,2008.
[8]刘阳冰.钢-混凝土组合结构体系抗震性能研究与地震易损性分析[D].北京:清华大学,2009.
[9]沈蒲生.高层混合结构设计与施工[M].北京:机械工业出版社,2008.
[10]聂建国,田淑明.大震下RC剪力墙(筒体)结构地震反应分析模型[J].建筑结构,2009,39(2):12-16.(NIE Jian-guo,TIANShu-ming.Model for analyzing seismic response of RC shear/core wall structure under major earthquakes[J].Building Structure,2009,39(2):12-16.(in Chinese))
[11]缪志伟,吴耀辉,马千里,等.框架-核心筒高层混合结构的三维空间弹塑性抗震分析[J].建筑结构学报,2009,30(4):119-129.(MIAO Zhi-wei,WU Yao-hui,MA Qian-li,et al.Seismic performance evaluation using nonlinear time history analysis with three-dimensional structural model for a hybrid frame-core tube structure[J].Journal of Building Structures,2009,30(4):119-129.(inChinese))
[12]钱稼茹,魏勇,蔡益燕,等.钢框架-混凝土核心筒结构框架地震设计剪力标准值研究[J].建筑结构,2008,38(3):1-5.(QIANJia-ru,WEI Yong,CAI Yi-yan,et al.Study on seismic design shear force for frame of steel frame-concrete core wall structures[J].Building Structure,2008,38(3):1-5.
[13]包世华,方鄂华.高层建筑结构设计[M].北京:清华大学出版社,2004.
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