摘要
通过24组钢筋在UHPC中拉拔性能试验,研究了钢筋埋深和保护层厚度等参数对界面粘结性能的影响规律,分析了界面粘结破坏机理。试验结果表明,共有3种破坏模式:劈裂破坏、劈裂拔出破坏、混凝土锥形体破坏。钢筋在UHPC中拔出分为界面脱粘、机械咬合拔出及摩擦失效3个阶段。钢筋与UHPC界面粘结强度为5.4~18.1 MPa,当保护层厚度从0.5d到1.5d,界面粘结强度最大提升253.7%。
Reinforced with UHPC interface bond properties for research,conducted a series of 24 reinforced in UHPC drawing performance testing,steel buried depth and thickness of the protective layer is studied on the interface bonding performance parameters,such as the influence law of interfacial bonding failure mechanism was analyzed.Test result shows that there are three failure modes:pull out fracturing,fracturing damage,concrete conical body damage.Reinforcement in UHPC pulls into interface mechanical occlusion and debonding failure,friction pulled out three stages.Reinforced with UHPC interface bond strength between 5.4 MPa to 18.1 MPa.When the cover thickness from 0.5 d to 1.5 d,interface bond strength maximum increase of 253.7%.
作者
王诗涵
黄声涛
隽平
唐玉婷
戚家南
WANG Shihan;HUANG Shengtao;JUAN Ping;TANG Yuting;QI Jianan(School of Civil Engineering,Southeast University,Nanjing 211189,China;Xinjiang Branch of Shanghai Pudong Architectural Design&Research Institute Co.,Ltd.,Urumqi 830000,China)
出处
《四川建材》
2022年第4期19-21,29,共4页
Sichuan Building Materials
基金
乌鲁木齐市钢箱梁桥面铺装中超高性能混凝土(UHPC)的研究与应用(8505008683)。
