摘要
对10个FRP-钢复合管约束UHPC短柱和4个钢管约束UHPC短柱进行了轴心受压试验,分析了钢管厚度、FRP层数和种类对FRP-钢复合管约束UHPC短柱轴压力学性能的影响规律.研究结果表明:随着钢管厚度增加,FRP-钢复合管约束UHPC短柱的极限荷载和强化阶段的平台强度均增大;增加FRP层数可以提高短柱的极限荷载和对应轴向变形;钢管厚度和FRP层数相同时,与GFRP相比,CFRP对短柱承载力的提高幅度较大;FRP与钢管黏结较好时,FRP与钢管能够协同工作。
Ten fiber reinforced polymer(FRP)-steel composite tube confined ultra-high performance concrete(UHPC)stub columns and four steel confined UHPC stub columns were tested under axial compression.The influence of steel tube thicknesses,FRP types and layers on the axial compressive behavior of FRP-steel composite tube confined UHPC stub columns were analyzed.The results show that with the increase of steel tube thickness,the ultimate bearing capacity and platform strength for the strengthening stage of FRP-steel composite tube confined UHPC stub columns increase.Increasing FRP layers can enhance the ultimate bearing capacity and axial deformation of stub columns.Comparing with GFRP,CFRP can greatly improve the bearing capacity of stub columns when the thickness of steel tube and FRP layer are the same.FRP and steel tube can work together when they are bound well.
作者
邓宗才
张亚宁
DENG Zongcai;ZHANG Yaning(The Key Laboratory of Urban Security and Disaster Engineering,Ministry of Education,Beijing University of Technology,Beijing 100124,China)
出处
《混凝土》
CAS
北大核心
2020年第5期36-39,共4页
Concrete
基金
北京市教委科技重点项目(KZ201810005008)
国家自然科学基金(51578021)。
