摘要
为了研究CRB550级高强钢筋取代普通钢筋作为钢筋混凝土(Reinforced Concrete,RC)柱箍筋的可行性,对6根不同等级箍筋的RC柱进行低周往复加载试验来考察RC柱的破坏形态、承载力、变形等,并利用有限元软件ABAQUS构建相应的模型,然后将模拟与试验的结果进行对比.通过调整柱的纵筋配筋率、纵筋直径及箍筋直径等参数,设计并模拟了12根柱,从RC柱的刚度退化、强度退化的角度分析评价了不同等级箍筋柱的抗震性能.结果表明:按照等强度原则设计出的CRB550级箍筋RC柱的性能退化指标与HRB400级箍筋RC柱的差别不大,两者在承载力和变形性能方面较为相似.因此在实际工程中CRB550级钢筋可替代HRB400级钢筋作为混凝土柱的内置箍筋使用.
In order to study whether CRB550high-strength reinforcement can replace ordinary reinforcement into the built-in stirrups of concrete column members,six concrete column members with different grades of stirrups were designed for cyclic loading test.The failure modes,skeleton curves and mechanical properties of reinforced concrete columns were obtained.The finite element software ABAQUS was used to construct the corresponding model,and the results of simulation and test were compared.Then 12reinforced concrete column members were designed and simulated according to the parameters of longitudinal reinforcement ratio,diameter of reinforcing reinforcement and stirrup diameter by finite element analysis software.The seismic performance of stirrup columns of different grades was evaluated from the angle of stiffness degradation and strength degradation.The results show that the performance degradation index of CRB550stirrup reinforced concrete column designed according to the principle of equal strength has little difference with HRB400stirrup reinforced concrete column.The bearing capacity and deformation performance are similar.Therefore,CRB550 grade reinforcement can replace HRB400 grade reinforcement as internal stirrup of concrete column in practical engineering.
作者
万海涛
弓喆
WAN Haitao;GONG Zhe(School of Civil Engineering and Architecture,Henan University,Henan Kaifeng475004,China)
出处
《河南大学学报（自然科学版）》
CAS
2020年第5期608-617,共10页
Journal of Henan University:Natural Science
基金
河南省科技攻关计划(172102310749)。
关键词
CRB550级钢筋
有限元模拟
刚度退化
强度退化
低周往复加载试验
CRB550grade reinforcement
finite element simulation
stiffness degradation
strength degradation
cyclic loading test
