The bond properties of reinforced concrete were studied and the effects of different cooling methods on the bonding properties were also investigated.To simulate the degradation effect of fire on the bond properties of reinforced concrete specimens,the variation regular of bond stress and ultimate slip between reinforcement and concrete under dif-ferent cooling methods was analyzed by pullout test.The pullout test shows that the reduction rules of bond properties of different cooling methods are similar when the temperature is higher than 400 ℃.When the temperature is less than 400 ℃,the damage degree of spray cooling on the bonding interface is greater,and the bond strength of natural cooling specimen is 20.5％higher than that of spray cooling specimen.
关键词
冷却方式/拉拔试验/钢筋混凝土/高温试验
Key words
cooling method/pullout test/reinforced concrete/high temperature test
维普
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