High‐Strength Concrete‐Steel Bond Behavior at Low Temperature

Laboratory experiments on the local bond behavior of high‐strength concrete were carried out under monotonic, repeated cyclic and reversed cyclic loading conditions in the temperature range of -10°C and -70°C (+14°F and -94°F). The values of maximum bond stress and the relationship between maximum bond stress and concrete compressive strength at low temperature are quite different from those at normal temperature [+20°C(+68°F)], especially under reversed cyclic loading. The experimental results are also compared with those for normal strength concrete observed and reported in an earlier study. Under monotonic loading conditions the ratio of maximum bond stress at low temperature to the maximum bond stress at normal temperature is different between high strength and normal strength concrete. Under reversed cyclic loading the average value of the bond factors (maximum bond stress divided by the concrete compressive strength) of both loading directions is smaller than those under monotonic or repeated cyclic loading conditions.