摘要
目的基于蜂窝梁钢框架中柱节点的抗震性能的研究,提出一种针对此类节点的恢复力模型骨架曲线,为此类工程实践提供理论依据。方法对18个蜂窝梁钢框架中柱节点模型进行数值模拟分析,以开孔率、开孔位置、孔型为变化参数,研究节点的滞回性能、承载性能、刚度退化、延性、耗能能力等抗震性能,建立一种针对此类节点的恢复力模型。结果圆形孔节点开孔位置为0.75~1倍梁高、正六边形孔节点开孔位置为1~1.25倍梁高,开孔率均为60%~65%时,可实现塑性铰外移,并对节点的承载力、延性和耗能能力产生明显的影响。所建立的恢复力模型骨架曲线与模拟曲线吻合较好。结论蜂窝梁中柱节点抗震性能良好,可实现梁铰机制。笔者提出的恢复力模型可为此类节点的弹塑性反应分析和工程抗震分析提供参考。
Based on the study of the seismic performance of mid-column joints in steel frames with celluler beams,a restoring force model skeleton curve for these joints is proposed,providing a theoretical basis for similar engineering applications.Numerical simulations were conducted on 18 joints of mid-column joints with celluler beams,varying parameters such as opening ratio,opening position,and hole shape.The seismic performance,including hysteresis behavior,bearing capacity,stiffness degradation,ductility,and energy dissipation,was analyzed to develop a restoring force model for these nodes.When circular hole openings are positioned at 0.75 to 1 times the beam height,and hexagonal hole openings at 1 to 1.25 times the beam height,with an opening ratio between 60%and 65%,plastic hinge relocation can be achieved,significantly influencing on bearing capacity,ductility,and energy dissipation of the joint.The skeleton curve of the proposed restoring force model aligns well with the simulation results.Celluler beam mid-column joints exhibit good seismic performance and facilitate the formation of a beam-hinge mechanism.The restoring force model proposed in this paper can serve as a reference for elastic-plastic response analysis and seismic analysis of such joints in engineering practice.
作者
董炀
贾连光
王春刚
赵庆岩
DONG Yang;JIA Lianguang;WANG Chungang;ZHAO Qingyan(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168;The First Company of China Eighth Engineering Bureau Ltd.,Ji′nan,China,250100)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2024年第6期1029-1037,共9页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51978422)。
关键词
蜂窝梁钢框架中柱节点
有限元分析
抗震性能
恢复力模型
mid-column joints in steel frame with cellular beam
finite element analysis
seismic performance
restoring force model
