半刚性连接钢框架的拟动力实验研究
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摘要
在钢框架结构的设计中,通常将梁柱节点处理为完全刚接或理想的铰接。但是在实际框架中,梁柱节点表现出半刚性。目前的实验研究基本都基于结构和构件的静力分析。本文对半刚性连接钢框架结构进行了拟动力实验研究,得出了在地震波激励作用下,半刚性节点初始刚度对钢框架的楼层刚度、基底剪力、楼层位移和楼层加速度的影响。对实验结果进行对比分析可以看出,在结构侧向位移满足的前提下半刚性连接刚度的减弱会引起结构作用效应的降低。实验总结出的节点半刚性对结构动力性能影响的一些结论,将为高层钢结构设计规范的修改提供实验基础。
In steel frame design,the joints between columns and beams are usually assumed as either rigid or perfectly hinge connection.Actually,the joints are semi-rigid connected.in the Literature shows that current experimental studies of frame structure and components are mainly based on static loading.An experimental study of pseudo-dynamic response for typical steel frames was carried out,the influence of steel frame initial joint rigidness on the floor stiffness,base shear,floor displacement and floor acceleration was obtained.Experimental results show that on the premise that lateral displacement meets the specification requirements,the weakening of stiffness of the connection will lower the structure effect.Some conclusions about the effects of semi-rigid connection on the structure performance are conducted,which may give an experimental foundation for the future revision of highrise steel structures design codes.
In steel frame design,the joints between columns and beams are usually assumed as either rigid or perfectly hinge connection.Actually,the joints are semi-rigid connected.in the Literature shows that current experimental studies of frame structure and components are mainly based on static loading.An experimental study of pseudo-dynamic response for typical steel frames was carried out,the influence of steel frame initial joint rigidness on the floor stiffness,base shear,floor displacement and floor acceleration was obtained.Experimental results show that on the premise that lateral displacement meets the specification requirements,the weakening of stiffness of the connection will lower the structure effect.Some conclusions about the effects of semi-rigid connection on the structure performance are conducted,which may give an experimental foundation for the future revision of highrise steel structures design codes.
引文
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[11]王燕,李华军,厉见芬.半刚性梁柱节点连接的初始刚度和结构内力分析[J].工程力学,2003,20(6):65-69(Wang yan,Li Huajun,Li Jianfeng.Initial stiffness of semi-rigid beam-to-column connections and structuralinternal force analysis[J].Engineering Mechanics,2003,20(6):65-69(in Chinese))
[2]Choudhury D,Ni mbalkar S.Seismic passive resistance by pseudo-dynamic method[J].Geo-technique,2007(9):699-702.
[3]Choudhury D,Ni mbalkar S.Seismic rotational displacement of gravity walls pseudo-dynamic method:passive case[J].Soil.Dyn.Earthquake Eng,2008(3):242-249.
[4]Lignos D G,Krawinkler H,Whittaker A.Shake table collapse tests of a 4-story moment resisting steel frame[C].14th World Conference on Earthquake Engineering,2008 Beijing,China Oct.12-17.
[5]Sophinopoulos D S.The effect of joint flexibility on the free elastic vibration characteristics of steel plane frames[J].Journal of Constructional Steel Research,2003(59):995-1008.
[6]GB50017-2003.钢结构设计规范[S].北京:中国建筑工业出版社,2003:63-73(GB50017-2003.Code for designof steel structure[S].Beijing:China Building Industry Press,2003:63-73(in Chinese))
[7]JGJ101-96.建筑抗震实验方法规程[S].北京:中国建筑工业出版社,1997:16-21(JGJ101-96.Code for Buildingseismic method[S].Beijing:China Building Industry Press,1997:16-21(in Chinese))
[8]陈瑜,董世民,李丽萍.《建筑抗震实验方法规程》中的拟动力实验方法简介[J].建筑科学,1995,2:155-156(ChenYu,Dong Shi ming,Li Liping.The pseudo-dynamic method Introduction of the Code for Building seismic method[J].Building Science,1995,2:155-156(in Chinese))
[9]胡文源,邹晋华.时程分析法中有关地震波选取的几个注意问题[J].南方冶金学院学报,2003,24:98-102(HuWenhua,Zhou Jinhua.Some Problems about the selection of seismic waves in the Ti me-history analysis method[J].Journal of Southern Institute of Metallurgy,2003,24:98-102(in Chinese))
[10]宗周红,林东欣,邱法维.两层钢管混凝土组合框架结构拟动力抗震性能试验研究[J].建筑结构学报,2002,4:55-58(Zong Zhouhong,Lin Dongxin,Qiu Fawei.Experi mental Research on Seismic Behavior of a Two-storyConcrete Filled Steel Tubular Composite Frame[J].Journal of Building Structures,2002,4:55-58(in Chinese))
[11]王燕,李华军,厉见芬.半刚性梁柱节点连接的初始刚度和结构内力分析[J].工程力学,2003,20(6):65-69(Wang yan,Li Huajun,Li Jianfeng.Initial stiffness of semi-rigid beam-to-column connections and structuralinternal force analysis[J].Engineering Mechanics,2003,20(6):65-69(in Chinese))
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