组合效应对腹板削弱型梁柱节点的影响
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摘要
采用数值模拟方法分析了混凝土楼板组合效应对钢框架腹板开圆孔削弱型梁柱节点的影响,着重讨论了节点承载力、弹塑性阶段的应变分布、梁塑性区的产生和扩展情况,并与未考虑组合效应此类节点的性能进行了对比.削弱截面与柱的距离和削弱半径是重要的削弱参数,决定了腹板削弱型节点塑性区的扩展特征.研究结果表明,组合效应对腹板开圆孔削弱型梁柱节点区域的应变分布和塑性区扩展影响显著,其削弱参数的确定须充分考虑楼板组合效应.
In this paper,a finite element model was built to simulate beam-to-column connection with opening in beam and concrete slab by using the software ABAQUS.Numerical analyses were carried out to study the effect of composite action on beam-to-column connection with opening in beam.The loading capacity,strain distribution on elastic-plastic stages and the development of plastic area of the connections with concrete slab were discussed.Behaviors between the connections with concrete slab and without concrete slab were compared.The distance from column to center of the opening and cutting radius of the opening in beam web were the main cutting parameters,which controlled the development of plastic area of connections considering composite action.The numerical results showed that composite action obviously affects the strain distribution and the development of plastic area on connections with opening in beam web,and the composite action should be taken into account for the determination of cutting parameters.
In this paper,a finite element model was built to simulate beam-to-column connection with opening in beam and concrete slab by using the software ABAQUS.Numerical analyses were carried out to study the effect of composite action on beam-to-column connection with opening in beam.The loading capacity,strain distribution on elastic-plastic stages and the development of plastic area of the connections with concrete slab were discussed.Behaviors between the connections with concrete slab and without concrete slab were compared.The distance from column to center of the opening and cutting radius of the opening in beam web were the main cutting parameters,which controlled the development of plastic area of connections considering composite action.The numerical results showed that composite action obviously affects the strain distribution and the development of plastic area on connections with opening in beam web,and the composite action should be taken into account for the determination of cutting parameters.
引文
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[8]徐爱红,陈宏,石永久,等.组合效应对高层钢框架梁柱节点脆性破坏的影响分析[J].四川建筑科学研究,2007,33(4):90-93.XU Aihong,CHEN Hong,SHI Yongjiu,et al.Effect ofcomposite action on the fracture of beam-to-column connec-tions in high-rise steel frames[J].Building Science Re-search of Sichuan,2007,33(4):90-93.(in Chinese)
[9]聂建国.钢-混凝土组合梁结构——试验、理论与应用[M].北京:科学出版社,2005.NIE Jianguo.Steel-concrete composite beams:Experi-ments,theories and applications[M].Beijing:SciencePress,2005.(in Chinese)
[10]Chen Shengjin,Chao Y C.Effect of composite action onseismic performance of steel moment connections with re-duced beam sections[J].Journal of Construction Steel Re-search,2001,57(5):417-434.
[2]FEMA-350D,Post-northridge welded flange connections[S].USA:Federal Emergency Management Agency,2000.
[3]李波,杨庆山.梁腹板开圆孔节点的分析模型[J].北京交通大学学报,2009,33(4):101-105.LI Bo,YANG Qingshan.Analysis model of beam-to-col-umn connection with opening in beam web[J].Journal ofBeijing Jiaotong University,2009,33(4):101-105.(inChinese)
[4]李波,杨庆山,杨娜.采用腹板开孔型梁柱节点的钢框架抗震性能试验研究[J].建筑结构学报,2008,28(6):160-166.LI Bo,YANG Qingshan,YANG Na.Experimental re-search on aseismic behavior of steel moment-resisting frame[J].Journal of Building Structures,2008,28(6):160-166.(in Chinese)
[5]樊宝锋,章梓茂,杨庆山.钢框架梁柱端板连接腹板开孔型节点的受力特性[J].北京交通大学学报,2009,33(4):78-82.FAN Baofeng,ZHANG Zimao,YANG Qingshan.Stresscharacteristics of beam-to-column end-plate connectionswith web opening in steel structures[J].Journal of BeijingJiaotong University,2009,3(4):78-82.(in Chinese)
[6]李波.梁腹板开圆孔的钢框架抗震性能研究[D].北京:北京交通大学,2006.LI Bo.Seismic behaviors of steel moment resisting frameincluding connections with opening in beam web[D].Bei-jing:Beijing Jiaotong University,2006.(in Chinese)
[7]石永久,苏迪,王元清.考虑组合效应的钢框架梁柱节点恢复力模型研究[J].世界地震工程,2008,24(2):15-20.SHI Yongjiu,SU Di,WANG Yuanqing.Study on restor-ing force models of steel beam-column connections withcomposite action[J].World Earthquake Engineering,2008,24(2):15-20.(in Chinese)
[8]徐爱红,陈宏,石永久,等.组合效应对高层钢框架梁柱节点脆性破坏的影响分析[J].四川建筑科学研究,2007,33(4):90-93.XU Aihong,CHEN Hong,SHI Yongjiu,et al.Effect ofcomposite action on the fracture of beam-to-column connec-tions in high-rise steel frames[J].Building Science Re-search of Sichuan,2007,33(4):90-93.(in Chinese)
[9]聂建国.钢-混凝土组合梁结构——试验、理论与应用[M].北京:科学出版社,2005.NIE Jianguo.Steel-concrete composite beams:Experi-ments,theories and applications[M].Beijing:SciencePress,2005.(in Chinese)
[10]Chen Shengjin,Chao Y C.Effect of composite action onseismic performance of steel moment connections with re-duced beam sections[J].Journal of Construction Steel Re-search,2001,57(5):417-434.
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