型钢混凝土剪力墙抗震性能影响参数研究
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摘要
型钢混凝土剪力墙是一种广泛应用于高层混合结构中的剪力墙形式。本文采用通用有限元程序ADINA,以边缘构件含钢率为主要参数,对不同剪跨比的几组剪力墙承载力和变形能力进行了分析,并与考虑了剪力墙混凝土等级、轴压比、配筋率和边缘约束指标等参数影响的剪力墙性能进行了比较研究。结果表明,在高层结构中采用较高强度的混凝土是有利的,但剪力墙的轴压比需要严格限制,且墙体配筋率并不是提高其抗震性能的有效手段。在高层混合结构剪力墙中,通过边缘构件设置型钢可有效增加墙体延性,且边缘约束构件的约束指标可取0.32左右。
Steel reinforced concrete shear walls is widely adopted in hybrid high-rise buildings.Based on the steel ratio of boundary element,the seismic performance of steel reinforced concrete shear walls with different aspect ratios is analyzed by using finite element program ADINA.The influencing factors like concrete grade,axial compression ratio,reinforcement ratio,boundary confinement index etc.are also considered for the contrast analysis.The results show that it's benefit to use the high-strength concrete on the high-rise structures.But the axial compression ratio of shear walls should be limited strictly and the seismic performance of wall can not improved effectively by reinforcement ratio.In the shear wall of hybrid high-rise buildings,the ductility of wall will be increased effectively by setting SRC on the edge components and taking the boundary confinement index to be about 0.32.
Steel reinforced concrete shear walls is widely adopted in hybrid high-rise buildings.Based on the steel ratio of boundary element,the seismic performance of steel reinforced concrete shear walls with different aspect ratios is analyzed by using finite element program ADINA.The influencing factors like concrete grade,axial compression ratio,reinforcement ratio,boundary confinement index etc.are also considered for the contrast analysis.The results show that it's benefit to use the high-strength concrete on the high-rise structures.But the axial compression ratio of shear walls should be limited strictly and the seismic performance of wall can not improved effectively by reinforcement ratio.In the shear wall of hybrid high-rise buildings,the ductility of wall will be increased effectively by setting SRC on the edge components and taking the boundary confinement index to be about 0.32.
引文
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[2]李一松,李国强,崔大光.型钢混凝土低矮剪力墙抗震性能试验研究[J].地震工程与工程振动,2009,29(4):92-102.LI Yisong,LI Guoqiang,CUI Daguang.Experimental study on seismic behavior of steel reinforced concrete low-rise shear wall[J].Journal ofEarthquake Engineering and Engineering Vibration,2009,29(4):92-102.(in Chinese)
[3]徐培福,薛彦涛,肖从真,等.高层型钢混凝土框筒混合结构抗震性能试验研究[J].建筑结构,2005,35(5):3-8.XU Peifu,XUE Yantao,XIAO Congzhen et al.Experimental study on seismic performance of high-rise SRC hybrid structures[J].Building Struc-ture,2005,35(5):3-8.(in Chinese)
[4]Shahrooz B M,Gong Bingnian,Gokhan T,et al.An overview of reinforced concrete core wall-steel frame hybrid structures[J].Prog.Struct.En-gng Mater.ASCE,2001(3):149-158.
[5]Goel S C.United States-Japan cooperative earthquake engineering research program on composite and hybrid structures[J].Journal of StructuralEngineering,ASCE,2004(2):157-158.
[6]Bonet J L,et al.Comparative study of anslytical and numerical algorithms for designing reinforced concrete sections under biaxial bending[J].Computers and Structures,2006(84):2184-2193.
[7]Dundar C,et al.Behaviour of reinforced and concrete-encased composite columns subjected to biaxial bending and axial load[J].Building and En-vironment February,2007(2):1-7.
[8]JGJ3-2010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,2010.JGJ 3-2010 Technical Specification for Concrete Structures of Tall Building[S].Beijing:China Building Industry Press,2010.(in Chinese)
[9]陈勤,钱稼茹,李更勤.剪力墙受力性能的宏模型静力弹塑性分析[J].土木工程学报,2004,37(3):35-43.CHEN Qin,QIAN Jiaru,LI Gengqin.Static elastic-plastic analysis of shear walls with macro-model[J].Civil Engineering Journal,2004,37(3):35-43.(in Chinese)
[10]楚留声.高烈度区型钢混凝土框架-钢筋混凝土筒体混合结构体系抗震性能研究[D].西安:西安建筑科技大学,2008.CHU Liusheng.Research on seismic performance of steel reinforced concrete frame-reinforced concrete core wall hybrid structure in high seismic in-tensity region[D].Xi’an:Xi’an University of Architecture&Technology,2008.(in Chinese)
[11]GB50011-2010建筑抗震规范[S].北京:中国建筑工业出版社,2010.GB50011-2010 Code for Seismic Design of Buildings[S].Beijing:China Building Industry Press,2010.(in Chinese)
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