摘要
为分析高温作用后机制砂混凝土与钢筋的黏结性能,对机制砂混凝土与钢筋锚固试件和天然砂混凝土与钢筋锚固试件分别进行常温和加热至300、500、700℃后的轴向拉拔试验。结果表明:经历300℃高温后,机制砂混凝土与钢筋黏结强度下降较常温时速度快,500、700℃温度后劣化程度天然砂混凝土试件基本一致;700℃高温后天然砂混凝土与钢筋的极限滑移量增长较常温和300℃时速度快,300、500℃温度后增加速度基本一致。
In order to analyze the post-high-temperature manufactured sand concrete and rebar bonding performance,the axial drawing test under normal temperature and heated to 300℃,500℃and 700℃was respectively conducted on manufactured sand concrete,rebar anchorage test-piece and natural sand concrete,rebar anchorage test-piece.The result showed after 300℃high temperature,manufactured sand concrete and rebar bonding strength declined faster than under normal temperature,after 500℃and 700℃temperature,the deterioration degree of natural sand concrete test-piece is basically consistent.After 700℃high temperature,the ultimate slip growth of natural sand concrete and rebar is faster than under normal temperature and 300℃,after 300℃and 500℃temperature,the acceleration is almost consistent.
作者
任雪振
韩阳
张彦
REN Xuezhen;HAN Yang;ZHANG Yan(School of Civil Engineering and Architecture,Henan University of Technology,Zhengzhou 450001,China;School of Henan Technical College of Construction,Zhengzhou 450064,China)
出处
《混凝土》
CAS
北大核心
2020年第10期51-54,58,共5页
Concrete
基金
国家自然科学基金(50678060)。
关键词
高温
机制砂混凝土
极限滑移量
拔出试验
high-temperature
manufactured sand concrete
ultimate slip
drawing test
