CFRP约束方钢管混凝土轴压短柱的静力性能研究  

Study of static performance of axially compressed concrete filled square steel tubular stub columns confined by CFRP

作　　者：王庆利[1] 薛阳[1] 邵永波[2] 闫煦[1] 

机构地区：[1]沈阳建筑大学,辽宁沈阳110168 [2]烟台大学,山东烟台264005

出　　处：《土木工程学报》2011年第3期24-31,共8页China Civil Engineering Journal

基　　金：教育部新世纪优秀人才支持计划(NCET-08-0865);辽宁省高等学校优秀人才支持计划(2007R31)

摘　　要：进行16个CFRP约束方钢管混凝土轴压短柱的静力试验。试验结果表明,试件的破坏属于强度破坏,CFRP延缓了钢管的屈曲,受约束混凝土具有良好的塑性填充性能,CFRP的增加和混凝土强度等级的提高可以提高试件的承载力和刚度。钢管与CFRP可以协同工作。试件的荷载-应变曲线可以分为弹性阶段、弹塑性阶段和下降段。给出受约束混凝土的应力-应变表达式,模拟试件的荷载-应变曲线和变形模态,计算结果与试验结果吻合良好。Sixteen axially compressed concrete filled square steel tubular stub columns confined by CFRP were experimentally investigated to study their static behavior.The results showed that the failure mode of the specimens is strength loss of the material,the buckling of the steel tube is deferred by CFRP,and the confined concrete exhibits good plasticity.Increasing the CFRP and the strength of the concrete may improve the strength and stiffness of the specimens.The steel tube and CFRP can work in a combined manner.The load-strain curves of the specimens can be divided into an elastic stage,an elastio-plastic stage,and a declining stage.The stress-strain relationship of the concrete confined by square CFRP-steel composite tube is provided,and the load-strain curves and the deformed modes of the specimens are simulated.The computed results agree well with the experimental results.

关 键 词：方钢管混凝土轴压短柱 CFRP约束 静力性能 试验研究 有限元模拟 

分 类 号：TU398[建筑科学—结构工程]