陈俊, 张白, 杨鸥, 蒋恩浩. 微锈蚀钢筋混凝土高温后粘结锚固性能试验研究[J]. 工程力学, 2018, 35(10): 92-100. DOI: 10.6052/j.issn.1000-4750.2017.06.0491
引用本文: 陈俊, 张白, 杨鸥, 蒋恩浩. 微锈蚀钢筋混凝土高温后粘结锚固性能试验研究[J]. 工程力学, 2018, 35(10): 92-100. DOI: 10.6052/j.issn.1000-4750.2017.06.0491
CHEN Jun, ZHANG Bai, YANG Ou, JIANG En-hao. BOND PERFORMANCE BETWEEN SLIGHTLY CORRODED STEEL BARS AND CONCRETE AFTER EXPOSED TO HIGH TEMPERATURES[J]. Engineering Mechanics, 2018, 35(10): 92-100. DOI: 10.6052/j.issn.1000-4750.2017.06.0491
Citation: CHEN Jun, ZHANG Bai, YANG Ou, JIANG En-hao. BOND PERFORMANCE BETWEEN SLIGHTLY CORRODED STEEL BARS AND CONCRETE AFTER EXPOSED TO HIGH TEMPERATURES[J]. Engineering Mechanics, 2018, 35(10): 92-100. DOI: 10.6052/j.issn.1000-4750.2017.06.0491

微锈蚀钢筋混凝土高温后粘结锚固性能试验研究

BOND PERFORMANCE BETWEEN SLIGHTLY CORRODED STEEL BARS AND CONCRETE AFTER EXPOSED TO HIGH TEMPERATURES

  • 摘要: 为研究高温对锈蚀钢筋混凝土结构粘结锚固性能的影响,对锈蚀试件(锈蚀率为1.08%)与非锈蚀试件先进行高温试验(20℃、200℃、400℃、600℃、800℃),再进行中心拔出试验。试验结果表明:随温度的升高,锈蚀试件与非锈蚀试件粘结强度均呈下降趋势,与非锈蚀试件相比,锈蚀试件在温度不超过400℃时,其粘结强度下降趋势较为平缓。分析了高温作用后混凝土抗压强度、钢筋极限强度、钢筋与混凝土间粘结强度三者之间的关系,并建立了考虑不同温度、不同锈蚀率等因素影响下钢筋与混凝土的粘结-滑移关系式。

     

    Abstract: The influence of high temperature exposure on the bond strength between corroded steel bars and concrete was investigated using pull-out tests. After being exposed to temperatures of (20℃, 200℃, 400℃, 600℃ and 800℃), the bond strength between concrete and reinforcing bars with reinforcement mass loss percentages of 0% and 1.08% was tested. The experimental results indicated that the ultimate bond strength between reinforcement and concrete decreases with the increasing temperature. The ultimate bond strength of the corroded specimens had less strength loss compared to the un-corroded specimens as the temperature was below 400℃. The variation laws of the compressive strength of concrete, the ultimate strength of steel bars and the bond strength between steel bars and concrete were analyzed after the specimens being exposed to high temperatures. Besides, the bond-slip relationship considering the influence of the temperature and corrosion is established.

     

/

返回文章
返回