钢框架翼缘削弱型和扩翼型节点受力性能研究
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摘要
采用翼缘削弱型节点及扩翼型节点可以使塑性铰外移,缓解梁柱节点连接处应力集中,避免在焊接热影响区发生脆性破坏.针对削弱型节点、扩翼型和普通刚性节点进行了数值分析,结果表明:削弱型节点由于梁翼缘削弱,导致节点承载力降低,扩翼型节点增加了梁端翼缘板宽度,承载力高于削弱型节点和普通刚性节点.通过计算模型分析了节点的设计参数,并给出节点设计参数取值范围,为钢框架节点抗震设计提供理论分析依据.
Both nodes of reduced beam section and widened beam section can make the plastic hinge shift away from the beam and column interface to relieve the stress concentration in the connections,to avoid brittle fracture in weld.3-D finite element models were used to analyze the mechanical properties of nodes of reduced beam section and widened beam section and ordinary nodes using ANSYS.The analysis results show that the bearing capacity of nodes of the reduced beam section is reduced due to weakened beam flanges,however,the bearing capacity of nodes of the widened beam section is enhanced due to widened beam flanges.Moreover,a scopes of design parameters of the nodes are given,for seismic design of steel frames.
Both nodes of reduced beam section and widened beam section can make the plastic hinge shift away from the beam and column interface to relieve the stress concentration in the connections,to avoid brittle fracture in weld.3-D finite element models were used to analyze the mechanical properties of nodes of reduced beam section and widened beam section and ordinary nodes using ANSYS.The analysis results show that the bearing capacity of nodes of the reduced beam section is reduced due to weakened beam flanges,however,the bearing capacity of nodes of the widened beam section is enhanced due to widened beam flanges.Moreover,a scopes of design parameters of the nodes are given,for seismic design of steel frames.
引文
1 Miller DK.Lessons learned from the Northridge earthquake. Engineering Structure,1998,20(4):249-260
2 Gross JL.A connection model for the seismic analysis of welded steel Moment frames.Engineering Structures, 1998,20(4-6):390-397
3 Song Jianlin,Ellingwood BR.Seismic reliability of special moment steel frames with welded connection.Journal of Structural Engineering,1999,125(4):357-371
4闫丽梅,范子芳.日本阪神地震对钢框架节点设计的影响.沈阳工业大学学报,2005,27(1):107-110(Yan Limei,Fan Zi-fang. Influence of Japan Hansin earthquake on steel frame joint.Journal of Shenyang University of Technology,2005, 27(1):107-110(in Chinese))
5孙利民,范立础.阪神地震后日本桥梁抗震设计规范的修订.同济大学学报,2001,29(1):60-64(Sun Limin,Fan Lichu. Revisions of seismic design codes on bridges in Japan after Kobe Earthquake.Journal of Tongji University,2001, 29(1):60-64(in Chinese))
6蔡益燕.阪神地震后日本钢结构的发展.中国建筑金属结构, 2005,8:22-23
7蔡益燕.考虑塑性铰外移的钢框架梁柱连接设计.建筑结构, 2004,34(2):3-9(Cai Yiyan.Beam-to-column connection of steel frame considering Shift-away of Plastic Hinge. Building Structure,2004,34(2):3-9(in Chinese))
8 Park JW,Huang IK.Experimental investigation of reduced beam section connections by use of web openings.Engineering Journal,AISC,2003.77-88
9 Engelhardt MD,Sabol TA.Reinforcing of steel moment connections with cover plates:benefits and limitations. Engineering Structures,1998,20(4-6):510-520
10 Chen CC,Lu CA,Lin CC.Parametric study and design of rib-reinforced steel moment connections.Engineering Structures,2005,27(5):699-708
11 Chen CC,Chen SW,Chung MD,et al.Cyclic behavior of unreinforced and rib-reinforced moment connection.Journal of Constructional Steel Research,2005,61(1):1-21
12 Chen CC,Lin CC,Lin CH.Ductile moment connections used in steel column-tree moment-resisting frames.Journal of Constructional Steel Research,2006,62(8):793-801
13 GB 50011-2001建筑抗震设计规范.北京:中国建筑工业出版社,2008
14 FEMA-350(Recommended Seismic Design Criteria for New Steel Moment-Frame Buildings).Washington DC, 2000
2 Gross JL.A connection model for the seismic analysis of welded steel Moment frames.Engineering Structures, 1998,20(4-6):390-397
3 Song Jianlin,Ellingwood BR.Seismic reliability of special moment steel frames with welded connection.Journal of Structural Engineering,1999,125(4):357-371
4闫丽梅,范子芳.日本阪神地震对钢框架节点设计的影响.沈阳工业大学学报,2005,27(1):107-110(Yan Limei,Fan Zi-fang. Influence of Japan Hansin earthquake on steel frame joint.Journal of Shenyang University of Technology,2005, 27(1):107-110(in Chinese))
5孙利民,范立础.阪神地震后日本桥梁抗震设计规范的修订.同济大学学报,2001,29(1):60-64(Sun Limin,Fan Lichu. Revisions of seismic design codes on bridges in Japan after Kobe Earthquake.Journal of Tongji University,2001, 29(1):60-64(in Chinese))
6蔡益燕.阪神地震后日本钢结构的发展.中国建筑金属结构, 2005,8:22-23
7蔡益燕.考虑塑性铰外移的钢框架梁柱连接设计.建筑结构, 2004,34(2):3-9(Cai Yiyan.Beam-to-column connection of steel frame considering Shift-away of Plastic Hinge. Building Structure,2004,34(2):3-9(in Chinese))
8 Park JW,Huang IK.Experimental investigation of reduced beam section connections by use of web openings.Engineering Journal,AISC,2003.77-88
9 Engelhardt MD,Sabol TA.Reinforcing of steel moment connections with cover plates:benefits and limitations. Engineering Structures,1998,20(4-6):510-520
10 Chen CC,Lu CA,Lin CC.Parametric study and design of rib-reinforced steel moment connections.Engineering Structures,2005,27(5):699-708
11 Chen CC,Chen SW,Chung MD,et al.Cyclic behavior of unreinforced and rib-reinforced moment connection.Journal of Constructional Steel Research,2005,61(1):1-21
12 Chen CC,Lin CC,Lin CH.Ductile moment connections used in steel column-tree moment-resisting frames.Journal of Constructional Steel Research,2006,62(8):793-801
13 GB 50011-2001建筑抗震设计规范.北京:中国建筑工业出版社,2008
14 FEMA-350(Recommended Seismic Design Criteria for New Steel Moment-Frame Buildings).Washington DC, 2000
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