钢-混凝土组合框架结构体系抗震性能研究
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摘要
为了研究钢-混凝土组合框架结构体系的抗震性能,本文分别建立了组合梁-方钢管混凝土柱框架结构(CB-CFST)、钢梁-方钢管混凝土柱框架结构(SB-CFST)、组合梁-等刚度RC柱框架结构(CB-ETRC)、钢梁-等刚度RC柱框架结构(SB-ETRC)和RC框架的结构模型.并对该5种结构进行了模态分析、多遇地震下的反应谱分析、弹性时程分析和罕遇地震下的弹塑性时程分析.结果表明:与钢梁-方钢管混凝土柱框架结构相比,组合梁-方钢管混凝土柱框架结构整体刚度得到提高,自振周期变短,结构位移反应总体变小.与组合梁-RC柱框架结构相比,在罕遇地震下,RC柱在通常配筋下已不能满足"大震不倒"的要求,增大柱截面配筋后,柱端仍出现塑性铰.
To investigate the seismic behavior of the steel-concrete composite frame structure system,a 4 polyline plastic hinge model of the composite beam is suggested for the elastic-plastic analysis of the composite frame.And the analytic models of CB-CFST,SB-CFST,CB-ETRC,SB-ETRC and RC frame structures are separately created.Then the mode analysis,spectrum and the elastic time history analysis under frequent earthquake,elastic-plastic analysis under server earthquake of these structures are carried out.Results illustrate that compared with SB-CFST,the integral stiffness of CB-CFST is enhanced;natural periods are shortened;displacement responses are decreased overall.Compared with the CB-RC frame,under rare earthquakes,RC columns can not satisfy the demand of"no collapsing with strong earthquake".And after increasing dimensions and reinforcement ratios of columns,the plastic hinge is also found at the end of columns.
To investigate the seismic behavior of the steel-concrete composite frame structure system,a 4 polyline plastic hinge model of the composite beam is suggested for the elastic-plastic analysis of the composite frame.And the analytic models of CB-CFST,SB-CFST,CB-ETRC,SB-ETRC and RC frame structures are separately created.Then the mode analysis,spectrum and the elastic time history analysis under frequent earthquake,elastic-plastic analysis under server earthquake of these structures are carried out.Results illustrate that compared with SB-CFST,the integral stiffness of CB-CFST is enhanced;natural periods are shortened;displacement responses are decreased overall.Compared with the CB-RC frame,under rare earthquakes,RC columns can not satisfy the demand of"no collapsing with strong earthquake".And after increasing dimensions and reinforcement ratios of columns,the plastic hinge is also found at the end of columns.
引文
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[3]宗周红,林东欣,房贞政,等.两层钢管混凝土组合框架结构抗震性能试验研究[J].建筑结构学报,2002,23(2):27-35.ZONG Zhou-hong,LIN Dong-xin,FANG Zhen-zheng,et al.Experimental research on seismic behavior of a two-story concrete filled steel tubular composite frame[J].Journal of Building Structures,2002,23(2):27-35.(in Chinese)
[4]蒋丽忠,曹华,余志武.钢-混凝土组合框架地震弹塑性时程分析[J].铁道科学与工程学报,2005,2(3):1-8.JIANG Li-zhong,CAO Hua,XU Zhi-wu.Elastic-plastic earthquake response of steel-concrete composite frame structure[J].Journal of Railway Science and Engineering,2005,2(3):1-8.(in Chinese)
[5]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,2007:15-30.
[6]NIE Jian-guo,QIN Kai,XIAO Yan.Push-over analysis of the seismic behavior of a concrete-filled rectangular tubular frame structure[J].Tsinghua Science and Technology,2006,11(1):124-130.
[7]聂建国,刘明,叶列平.钢-混凝土组合结构[M].北京:中国建筑工业出版社,2005:20-40.
[8]陈戈.钢-混凝土组合框架的试验及理论分析[D].北京:清华大学土木工程系,2005.CHEN Ge.Experiments and research on steel-concrete composite frames[D].Beijing:Department of Civil Engineering Tsinghua University,2005.(in Chinese)
[9]聂建国,秦凯,肖岩.方钢管混凝土柱节点的试验研究及非线性有限元分析[J].工程力学,2006,23(11):99-109.NIE Jian-guo,QIN Kai,XIAO Yan.Experimental investigation and nonlinear finite element analysis on the behavior of concrete-filled square steel tubular column connections[J].Engineering Mechanics,2006,23(11):99-109.(in Chinese)
[10]聂建国,余洲亮,袁彦声,等.钢-混凝土组合梁恢复力模型的研究[J].清华大学学报:自然科学版,1999,39(6):121-123.NIE Jian-guo,XU Zhou-liang,Yuan Yan-sheng,et al.Research on restoring force model of composite steel-concrete beams[J].Journal of Tsinghua Univ.(Sci&Tech),1999,39(6):121-123.(in Chinese)
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