CRB600H级箍筋混凝土短柱抗震性能研究  

Research on seismic behavior of concrete short columns with CRB600H stirrups

作　　者：赵丽洁[1,2] 朱崎峰 练继建 沈金生[1,2] ZHAO Lijie;ZHU Qifeng;LIAN Jijian;SHEN Jinsheng(School of Civil Engineering,Hebei University of Engineering,Handan 056038,China;School of Civil Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038 [2]天津大学建筑工程学院,天津300072

出　　处：《世界地震工程》2023年第4期53-65,共13页World Earthquake Engineering

基　　金：河北省自然科学基金项目(E2019402183);河北省创新研究群体项目(E2020402074);邯郸市科技专项计划项目(19422051008-29);河北省全职引进高端人才科研项目(2020HBQZYC013)。

摘　　要：为研究高强箍筋混凝土柱抗震性能,通过对CRB600H级高强箍筋混凝土短柱低周往复加载试验展开数值模拟研究。利用OpenSEES中的Nonlinear Beam Column单元、零长度截面转动弹簧单元和零长度剪切弹簧单元,建立了考虑弯-剪耦合效应的抗震数值分析模型。分析轴压比、剪跨比对CRB600H级箍筋柱的滞回性能、刚度退化、延性及耗能性能的影响,并以HRB400级箍筋柱进行对比分析,结果表明:轴压比越大的构件水平抗剪承载力,延性和耗能能力越差;剪跨比越大构件的水平抗剪承载力越低,延性和耗能能力越好;CRB600H级和HRB400级箍筋柱,两者承载力接近,CRB600H级箍筋柱延性和抗震性能更好。In order to study the seismic performance of high-strength stirrups concrete columns,the numerical simulation study was carried out on the CRB600H high-strength stirrups concrete short columns under cyclic lateral loading and constant axial loading.The numerical model for seismic analysis considering flexure-shear interaction was established by Nonlinear Beam Column element,zero-length section rotational spring element and zero-length shear spring element in OpenSEES.The effects of axial compression ratio and shear span ratio on the hysteretic behavior,stiffness degradation,ductility and energy dissipation performance of CRB600H and HRB400 stirrups columns were compared and analyzed.The results indicated that:With the increase of axial compression ratio,the horizontal shear capacity increases,while ductility and energy dissipation capacity decreases.With the increase of shear span ratio,the horizontal shear capacity becomes worse,and the ductility and energy dissipation capacity all increases.CRB600H and HRB400 stirrups columns have similar bearing capacity,and CRB600H stirrups columns have better ductility and seismic performance.

关 键 词：CRB600H钢筋 钢筋混凝土柱 OPENSEES 抗震性能 

分 类 号：TU375.3[建筑科学—结构工程]