摘要
针对超高性能混凝土与钢筋的黏结性能,以钢筋锚固长度、钢筋直径、混凝土保护层厚度为主要参数,进行了超高性能混凝土试件中心拉拔试验研究。研究结果表明:试件破坏形态可归纳为钢筋拔出破坏、劈裂破坏和钢筋拉断破坏;钢筋直径对自由端滑移量影响较大,对黏结强度影响较小;给出了临界保护层厚度的建议值。
Aiming at the stickiness energy of ultra-high performance concrete and reinforcing steel bars,taking the anchorage length of steel bars,diameter of steel bars and thickness of concrete cover as main parameters,the central pull-out tests of ultra-high performance concrete specimens were carried out.The analysis results show that the failure pattern of specimens can be summarized as the pull-out failure,splitting failure and breaking of steel bars.The steel bar diameter has a great influence on the slip at the free end,and has less influence on the bonding strength.In addition,a proposed value for the critical layer thickness was given.
作者
郑七振
让梦
李鹏
ZHENG Qizhen;RANG Meng;LI Peng(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《上海理工大学学报》
CAS
北大核心
2018年第4期398-402,共5页
Journal of University of Shanghai For Science and Technology
关键词
超高性能混凝土
中心拉拔试验
黏结性能
ultra-high performance concrete
central pull-out test
bond behavior
作者简介
第一作者:郑七振(1962-),男,教授.研究方向:结构工程计算与仿真.E-mail:zhengqz@usst.edu.cn
