配置630MPa高强钢筋混凝土柱抗震性能试验研究  

Experimental investigation on seismic performance of concrete columns reinforced with 630MPa high-strength steel bars

作　　者：张健新 张鑫 岳圆圆 石晓娜 赵晓雪 ZHANG Jianxin;ZHANG Xin;YUE Yuanyuan;SHI Xiaona;ZHAO Xiaoxue(School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China;Tendering Procurement Center,Hebei University of Technology,Tianjin 300401,China;Civil Engineering Technology Research Center of Hebei Province,Tianjin 300401,China;Zhongtu International Architectural Design Co.,Ltd.,Shijiazhuang 050035,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]河北工业大学招标采购中心,天津300401 [3]河北省土木工程技术研究中心,天津300401 [4]中土大地国际建筑设计有限公司,石家庄050035

出　　处：《建筑结构》2025年第1期79-84,共6页Building Structure

基　　金：河北省自然科学基金(E2021202012);河北省建设科技研究项目(2021-2004);河北省建设科技研发计划(2017-2099)。

摘　　要：为研究高强配筋对方形截面混凝土柱抗震性能的影响,对6根配置有屈服强度为630、600、500、400MPa钢筋的边长为300mm的方形截面混凝土柱进行了拟静力加载试验,试验变量为钢筋强度、轴压比和纵向钢筋配筋率,对各试件的最终破坏形态、承载力、位移延性、滞回曲线、刚度退化曲线和耗能曲线进行分析。试验结果表明:配置600MPa和630MPa钢筋的混凝土柱与配置400MPa和500MPa钢筋的混凝土柱均发生弯曲破坏;600MPa和630MPa纵筋和箍筋与混凝土具有良好的协同作用,使混凝土柱能充分发挥材料性能,有较为饱和的滞回曲线,并具有良好的震后恢复性;纵筋配筋率的增加能有效提高配置高强钢筋混凝土柱的位移延性,增强耗能能力;适当的试件轴压比能使其具有相对较好的耗能和抗震能力。To investigate the effects of high strength reinforcement on seismic performance of concrete columns with square section,the quasi-static loading tests were carried out on six square section columns with side length of 300 mm and reinforced steel bars with a yield strength of 630,600,500MPa and 400MPa.The design parameters of specimens were yield strength of reinforcement,axial compression ratio and longitudinal reinforcement ratio.The final failure mode,load-bearing capacity,displacement ductility,hysteresis curve,stiffness degradation curve and energy dissipation curve of each specimen were analyzed.The test results show that the concrete columns with 600MPa and 630MPa reinforcement and columns with 400MPa and 500MPa reinforcement all experienced bending failure.The 600MPa and 630MPa longitudinal reinforcement and stirrup in the concrete column have a good synergistic effect,which makes the concrete column to fully utilize the material properties,to have a relatively saturated hysteretic curve and good post-earthquake recovery performance.With the increase of longitudinal reinforcement ratio,the displacement ductility and energy dissipation capacity of the concrete columns are improved.Reasonable axial compression ratio of the specimen can enable it to have relatively good energy dissipation.

关 键 词：630MPa高强钢筋 轴压比 抗震性能 拟静力试验 

分 类 号：TU391[建筑科学—结构工程]