腹板双角钢梁柱连接的滞回性能
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摘要
为了研究腹板双角钢梁柱连接的滞回性能,在考虑材料、几何和接触状态非线性基础上,采用三维实体单元对腹板双角钢梁柱连接进行了循环加载有限元模拟.系统研究了角钢厚度、角钢长度、与柱连接角钢肢螺栓中心线到与梁连接角钢肢背距离以及高强螺栓直径和级别等参数对连接承载能力和滞回性能的影响.有限元分析结果表明:大部分连接在循环荷载作用下表现出良好的延性,转角超过0.04 rad,抗弯强度不大,可作为铰接节点;少部分连接具有相当的抗弯能力,在结构分析中,须考虑节点抗弯强度对框架性能的影响,不能简单作为铰接处理.建议在设计时,螺栓的线距在满足构造要求同时,取最大线距值;连接在满足抗剪要求的前提下,螺栓中距和端距应取最小构造间距,以保证角钢长度取值较小.
In order to study hysteretic behaviors of steel double web angles framing connections,finite element analysis for steel double web angles framing connections under cyclic loading was carried out.based on consideration of material,geometric and contact nonlinearity.3D solid element was adopted in the connection models.The connection angles were bolted to the column flange and welded to the beam web.The effects of the angle length,the angle thickness,the gauge distance from the edge of the angle to the center of the bolt line,and the bolt diameter and grade on strength and hysteretic behavior of connections were studied.Finite element results reveal that major connections exhibit good ductile behaviors;connection rotation exceeds 0.04 radians;these connections without enough resisting-moment ability can be considered as pinned joints.Few connections can develop considerable moment,and the effects of connections strength on behaviors of frames should be considered in frame structures analysis.In the design,it is proposed that the gauge distance from the edge of the angle to the center of the bolt line is used for the maximum value on condition that the value is satisfied with detailing requirements;the spacing and edge distance of bolts are used for the minimum detailing spacing to ensure that the angle length is relative small.
In order to study hysteretic behaviors of steel double web angles framing connections,finite element analysis for steel double web angles framing connections under cyclic loading was carried out.based on consideration of material,geometric and contact nonlinearity.3D solid element was adopted in the connection models.The connection angles were bolted to the column flange and welded to the beam web.The effects of the angle length,the angle thickness,the gauge distance from the edge of the angle to the center of the bolt line,and the bolt diameter and grade on strength and hysteretic behavior of connections were studied.Finite element results reveal that major connections exhibit good ductile behaviors;connection rotation exceeds 0.04 radians;these connections without enough resisting-moment ability can be considered as pinned joints.Few connections can develop considerable moment,and the effects of connections strength on behaviors of frames should be considered in frame structures analysis.In the design,it is proposed that the gauge distance from the edge of the angle to the center of the bolt line is used for the maximum value on condition that the value is satisfied with detailing requirements;the spacing and edge distance of bolts are used for the minimum detailing spacing to ensure that the angle length is relative small.
引文
[1]ASTANEH-ASL A,NADER M N,LINCOLN M.Cyclicbehavior of double angle connections[J].Journal of Struc-tural Engineering,ASCE,1989,115(5):1101-1118.
[2]STEFANO M D,LUCA A D,ASTANEH-ASL A.Modeling of cyclic moment-rotation response of double-angle connections[J].Journal of Structural Engineer-ing,ASCE,1994,120(1):212-229.
[3]STEFANO MD,ASTANEH-ASL A.Axial force-dis-placement behavior of steel double angles[J].Journalof Constructional Steel Research,1991,20:161-181.
[4]GURAVICHS,DAWE J L.Simple beam connections incombined shear and tension[J].Journal of Construc-tional Steel Research,1998,46:241-242.
[5]陈爱国.钢框架腹板双角钢梁柱抗剪连接在循环荷载作用下的破坏机理及抗震设计对策[D].西安:西安建筑科技大学,2003.
[6]中华人民共和国国家标准GB/T1231———91钢结构用大六角头螺栓、大六角螺母、垫圈技术条件[S].北京:中国标准出版社,1991.
[7]宋振森.刚性钢框架梁柱连接在地震作用下的累积损伤破坏机理及抗震设计对策[D].西安:西安建筑科技大学,2001.
[8]陈爱国,顾强,苏明周,等.腹板双角钢梁柱连接循环荷载试验研究[J].建筑结构学报,2003,24(6):67-71.
[9]SAC/BD-97/02,Protocol for fabrication,inspection,testing,and documentation of beam-to-column testsand others experimental specimens[R].Sacramento:SAC Joint Venture,1997.
[10]ENV 1993-1-1,Eurocode 3:Design of SteelStructures,Part 1.1:General rules and rules forbuildings[S].Brussels:European Committee forStandardisation,1992.
[2]STEFANO M D,LUCA A D,ASTANEH-ASL A.Modeling of cyclic moment-rotation response of double-angle connections[J].Journal of Structural Engineer-ing,ASCE,1994,120(1):212-229.
[3]STEFANO MD,ASTANEH-ASL A.Axial force-dis-placement behavior of steel double angles[J].Journalof Constructional Steel Research,1991,20:161-181.
[4]GURAVICHS,DAWE J L.Simple beam connections incombined shear and tension[J].Journal of Construc-tional Steel Research,1998,46:241-242.
[5]陈爱国.钢框架腹板双角钢梁柱抗剪连接在循环荷载作用下的破坏机理及抗震设计对策[D].西安:西安建筑科技大学,2003.
[6]中华人民共和国国家标准GB/T1231———91钢结构用大六角头螺栓、大六角螺母、垫圈技术条件[S].北京:中国标准出版社,1991.
[7]宋振森.刚性钢框架梁柱连接在地震作用下的累积损伤破坏机理及抗震设计对策[D].西安:西安建筑科技大学,2001.
[8]陈爱国,顾强,苏明周,等.腹板双角钢梁柱连接循环荷载试验研究[J].建筑结构学报,2003,24(6):67-71.
[9]SAC/BD-97/02,Protocol for fabrication,inspection,testing,and documentation of beam-to-column testsand others experimental specimens[R].Sacramento:SAC Joint Venture,1997.
[10]ENV 1993-1-1,Eurocode 3:Design of SteelStructures,Part 1.1:General rules and rules forbuildings[S].Brussels:European Committee forStandardisation,1992.
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