采用钢梁翼缘对接栓焊节点的钢框架动力响应分析
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摘要
基于一种新型钢框架连接节点——钢梁现场翼缘对接栓焊节点的半刚性性能,对其连接的钢框架进行非线性动力时程分析,探讨采用此新型节点的钢框架的动力特性。在计算模型中将栓焊节点简化为弹簧单元,采用有限元软件ANSYS研究连接刚度及不同地震波对钢框架模态、层间位移角、加速度、层间剪力等的影响,并与采用普通焊接节点的钢框架的动力性能进行对比分析。结果表明,采用此新型节点的钢框架的结构侧移值较焊接钢框架有所增加,但基底剪力值降低60.6%,层间剪力减小2~3倍。新型节点初始转动刚度小于普通焊接节点,因此钢框架的基本自振周期明显增大。综合分析结果,此新型节点是一种力学性能良好的节点,其连接的钢框架体系符合抗震要求,可应用于地震区域。
This paper presents a nonlinear time history analysis on semi-rigid steel frame with a new spliced joint,namely,flange bolted-welded connection.The main objective of this paper is to study the effect of connection rigidity and different seismic waves to mode shape,inter-story drift,acceleration as well as inter-story shear force of semi-rigid steel frames.The flange bolted-welded connection is incorporated using spring element in finite element model of ANSYS.The analysis results show the lateral displacement of semi-rigid frame increases as compared to the frame with welded connection,while the base shear decreases by 60.6%.The inter-story shear force also reduces by 2to 3times of that of rigid frame.Owing to smaller initial rotational stiffness of the new joint,the natural vibration period of semi-rigid frame increases significantly.These results indicate the new joint exhibits good mechanical behavior,and the semi-rigid steel frame with new joint meets the requirement of seismic design code,therefore it can be used in earthquake area.
This paper presents a nonlinear time history analysis on semi-rigid steel frame with a new spliced joint,namely,flange bolted-welded connection.The main objective of this paper is to study the effect of connection rigidity and different seismic waves to mode shape,inter-story drift,acceleration as well as inter-story shear force of semi-rigid steel frames.The flange bolted-welded connection is incorporated using spring element in finite element model of ANSYS.The analysis results show the lateral displacement of semi-rigid frame increases as compared to the frame with welded connection,while the base shear decreases by 60.6%.The inter-story shear force also reduces by 2to 3times of that of rigid frame.Owing to smaller initial rotational stiffness of the new joint,the natural vibration period of semi-rigid frame increases significantly.These results indicate the new joint exhibits good mechanical behavior,and the semi-rigid steel frame with new joint meets the requirement of seismic design code,therefore it can be used in earthquake area.
引文
[1]何敏娟,焦燏烽,马人乐.钢梁栓-焊混合连接节点性能试验[J].同济大学学报:自然科学版,2013,41(12):1787-1792He Minjuan,Jiao Yufeng,Ma Renle.Experiment research on joint behavior of flange bolted-welded connection for steel column-beam[J].Journal of Tongji University:Natural Science,2013,41(12):1787-1792(in Chinese)
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[5]Phu-Cuong Nguyen,Seung-Eock Kim.Nonlinear elastic dynamic analysis of space steel frames with semi-rigid connections[J].Journal of Constructional Steel Research,2013,84(2):72-81
[6]胡习兵,沈浦生,舒兴平,等.连接的半刚性对钢框架结构动力性能的影响[J].工程抗震与加固改造,2006,28(6):30-38Hu Xibing,Shen Pusheng,Shu Xingping,et al.Effects of semi-rigid connections on dynamic behaviors of steel frame structures[J].Earthquake Resistant Engineering and Retrofitting,2006,28(6):30-38(in Chinese)
[7]Chen W F,Lui E M.Effect of joint flexibility on the behavior of steel frames[J].Computers and Structures,1987,26(5):719-732
[8]胡习兵.半刚性连接平面钢框架结构弹塑性分析及抗震性能研究[D].长沙:湖南大学,2007Hu Xibing.Elastic-plastic analysis and seismic performance research on semi-rigid connection of steel frame structure[D].Changsha:Hunan University,2007(in Chinese)
[9]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007Wang Xinmin.ANSYS numerical analysis of engineering structure[M].Beijing:China Communications Press,2007(in Chinese)
[10]邵永松,王晓东,谢礼立.半刚性连接空间钢框架在地震作用下的侧移分析[J].世界地震工程,2008,24(4):30-35Shao Yongsong,Wang Xiaodong,Xie Lili.Analysis on lateral displacement of semi-rigid connection space frame under earthquake motions[J].World Earthquake Engineering,2008,24(4):30-35(in Chinese)
[11]EN 1993-1-8 Eurocode 3:Design of Steel Structures—Part1-8:Design of Joints[S].Brussels:CEN,2005
[12]孙修礼,王永明,管毅,等.半刚性连接框架结构的动力响应分析[J].工程抗震与加固改造,2007,29(4):18-22Sun Xiuli,Wang Yongming,Guan Yi,et al.Study on the dynamic response of semi-rigid frame structure[J].Earthquake Resistant Engineering and Retrofitting,2007,29(4):18-22(in Chinese)
[13]GB 50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010GB 50011—2010 Code for Seismic Design of Buildings[S].Beijing:China Architecture&Building Press,2010(in Chinese)
[2]J G.S da Silvaa,L R O de Lima,P C G da S Vellasco,et al.Nonlinear dynamic analysis of steel portal frames with semirigid connections[J].Engineering Structures,2008,30(9):2566-2579
[3]张一舟,王元清,施刚,等.节点刚度对多层平面钢框架抗震性能的影响分析[J].华中科技大学学报:城市科学版,2006,23(2):41-45Zhang Yizhou,Wang Yuanqing,Shi Gang,et al.Effect of joint stiffness on dynamic behaviors and seismic properties of twodimensional multistory steel frames[J].Journal of Huazhong University of Science and Technology:Urban Science,2006,23(2):41-45(in Chinese)
[4]谢小松,周瑞忠.半刚性连接钢框架结构抗震的时程计算及实例分析[J].福州大学学报:自然科学版,2004,32(2):184-189Xie Xiaosong,Zhou Ruizhong.Seismic time-history analysis of steel frame with semi-rigid connections[J].Journal of Fuzhou University:Natural Science,2004,32(2):184-189(in Chinese)
[5]Phu-Cuong Nguyen,Seung-Eock Kim.Nonlinear elastic dynamic analysis of space steel frames with semi-rigid connections[J].Journal of Constructional Steel Research,2013,84(2):72-81
[6]胡习兵,沈浦生,舒兴平,等.连接的半刚性对钢框架结构动力性能的影响[J].工程抗震与加固改造,2006,28(6):30-38Hu Xibing,Shen Pusheng,Shu Xingping,et al.Effects of semi-rigid connections on dynamic behaviors of steel frame structures[J].Earthquake Resistant Engineering and Retrofitting,2006,28(6):30-38(in Chinese)
[7]Chen W F,Lui E M.Effect of joint flexibility on the behavior of steel frames[J].Computers and Structures,1987,26(5):719-732
[8]胡习兵.半刚性连接平面钢框架结构弹塑性分析及抗震性能研究[D].长沙:湖南大学,2007Hu Xibing.Elastic-plastic analysis and seismic performance research on semi-rigid connection of steel frame structure[D].Changsha:Hunan University,2007(in Chinese)
[9]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007Wang Xinmin.ANSYS numerical analysis of engineering structure[M].Beijing:China Communications Press,2007(in Chinese)
[10]邵永松,王晓东,谢礼立.半刚性连接空间钢框架在地震作用下的侧移分析[J].世界地震工程,2008,24(4):30-35Shao Yongsong,Wang Xiaodong,Xie Lili.Analysis on lateral displacement of semi-rigid connection space frame under earthquake motions[J].World Earthquake Engineering,2008,24(4):30-35(in Chinese)
[11]EN 1993-1-8 Eurocode 3:Design of Steel Structures—Part1-8:Design of Joints[S].Brussels:CEN,2005
[12]孙修礼,王永明,管毅,等.半刚性连接框架结构的动力响应分析[J].工程抗震与加固改造,2007,29(4):18-22Sun Xiuli,Wang Yongming,Guan Yi,et al.Study on the dynamic response of semi-rigid frame structure[J].Earthquake Resistant Engineering and Retrofitting,2007,29(4):18-22(in Chinese)
[13]GB 50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010GB 50011—2010 Code for Seismic Design of Buildings[S].Beijing:China Architecture&Building Press,2010(in Chinese)
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