高层钢-混凝土混合结构的弹塑性时程分析
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摘要
采用ABAQUS通用有限元软件分析钢-混凝土混合结构在地震作用下的动力特性及动力时程反应,得到了结构在不同地震烈度下的顶点位移时程、加速度时程、楼层位移及层间位移角反应;并研究了地震作用下混合结构的开裂、屈服与破坏情况。研究结果表明:混合结构的楼层侧移呈弯剪综合的变形特性;结构的最大层间位移角发生在结构的中下部楼层,且随地震烈度加大,最大层间位移角出现的楼层位置呈下移趋势;混凝土核心筒的连梁先于底层剪力墙发生破坏而成为结构的薄弱环节。
The finite element program ABAQUS was applied to study the dynamic characteristics and time-reaction of hybrid structure under the earthquake function,the displacement time-history response of top floor,acceleration time-history,floor displacement and inner-story drifts ratio of the structure were obtained,and the character of its crack development,yielding and failure situation were also discussed in detail.The results show that floor sideway of the hybrid structure shows shear-flexural deformation characteristic;Maximal story angular drift of the structure occurs in the upper floors,with the earthquake intensified,whose position drops;Coupling beam of concretes corewall is often destroyed before the first floor shear wall and becomes the weak link.
The finite element program ABAQUS was applied to study the dynamic characteristics and time-reaction of hybrid structure under the earthquake function,the displacement time-history response of top floor,acceleration time-history,floor displacement and inner-story drifts ratio of the structure were obtained,and the character of its crack development,yielding and failure situation were also discussed in detail.The results show that floor sideway of the hybrid structure shows shear-flexural deformation characteristic;Maximal story angular drift of the structure occurs in the upper floors,with the earthquake intensified,whose position drops;Coupling beam of concretes corewall is often destroyed before the first floor shear wall and becomes the weak link.
引文
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[2]郭军庆,王雪韵,雷自学,等.加芯混凝土框架柱轴压比限值试验研究[J].建筑科学与工程学报,2005,22(4):45-49.GUO Jun-qing,WANG Xue-yun,LEI Zi-xue,et al.Experimental research on limit value of axial compressionratio for concrete frame columns with central reinforcement[J].Journal of Architecture and Civil Engineering,2005,22(4):45-49.
[3]林宏伟,石志飞.钢筋混凝土框架梁-剪力墙平面外连接节点的力学分析[J].建筑科学与工程学报,2007,24(3):56-60.LIN Hong-wei,SHI Zhi-fei.Mechanical analysis fornon-planar reinforced concrete frame beam and shear-wall Joint[J].Journal of ArcHitecture and Civil Engineer-ing,2007,24(3):56-60.
[4]沈蒲生,陈宇.带加强层的高层框架-变截面核心筒结构的自由振动分析[J].建筑科学与工程学报,2007,24(3):19-24.SHEN Pu-sheng,CHEN Yu.Free vibration analysis oftall frame and changed-section core wall structures withoutrigger[J].Journal of Architecture and Civil Engineer-ing,2007,24(3):19-24.
[5]周向明,李国强,丁翔.高层钢-混凝土混合结构弹塑性地震反应简化分析模型[J].建筑结构,2002,32(5):26-30.ZHOUXiang-ming,LI Guo-qiang,DING Xiang.Sim-plified approach for elasto-plastic analysis of steel-con-crete hybrid structures for high-rise buildings subjectedto earthquake[J].Building Structure,2002,32(5):26-30.
[6]李国强,丁翔,郑敬有,等.高层建筑钢-混凝土混合结构分区耦合分析模型及开裂层位移参数分析[J].建筑结构,2002,32(2):21-25.LI Guo-qiang,DING Xiang,ZHENG Jing-you,et al.Hybrid analysis model of steel-concrete high-rise struc-ture and parameter study on storey drifts when shear wallcracking[J].Building Structure,2002,32(5):21-25.
[7]刘坚,李开禧,张利.钢框架-混凝土剪力墙混合结构的简化计算方法[J].四川建筑科学研究,2003(6):21-23.LIU Jian,LI Kai-xi,ZHANG Li.The simplified calcu-lation approach of steel frames-reinforced concrete shearwall mixed structure[J].Building Science Research of Si-chuan,2003(6):21-23.
[8]王金昌,陈页开.ABAQUS在土木工程中的应用[M].杭州:浙江大学出版社,2006.WANG Jin-chang,CHEN Ye-kai.The application ofABAQUS in civil engineering[M].Hangzhou:Zhejiang U-niversity Press,2006.
[9]吕西林,金国芳,吴晓涵.钢筋混凝土结构非线性有限元理论与应用[M].上海:同济大学出版社,1997.LU Xi-lin,JIN Guo-fang,WU Xiao-han.Nonlinearfinite element analysis theory and application to RC struc-ture[M].Shanghai:Tongji University Press,1997.
[10]张小清.钢框架-钢筋混凝土核心筒结构受力性能的非线性有限元分析[D].长沙:湖南大学土木工程学院,2006.ZHANG Xiao-qing.Nonlinear finite element analysis onthe mechanical performance of steel frame-RC corewallhybrid structure master[D].Changsha:Civil EnineeringInstitute Hunan University,2006.
[11]刘晶波,杜修力.结构动力学[M].北京:机械工业出版社,2005.LIU Jing-bo,DU Xiu-li.Dynamics of structures[M].Beijing:China Machine Press,2005.
[12]庄茁,张帆,岑松.非线性有限元分与实例[M].北京:科学出版社,2005.ZHUANG Zhuo,ZHANG Fan,CEN Song.Nonlinear fi-nite element analysis and example[M].Beijing:SciencePress,2005.
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