EXPERIMENT AND ANALYSIS OF BOND PERFORMANCE BETWEEN HIGH-STRENGTH REINFORCING BAR AND HIGH-STRENGTH CONCRETE

It is studied the main affection on bond performance between high-strength reinforcing bar and high-strength concrete by pull-out experiment of 48 specimens.It is analysed the causes of devastating phenomenon and compared to the classical load-slip curves of different base based on experiment.The test results revealed that its bond strength increases by decreasing anchorage length and increasing stirrup ratio,thickness of concrete cover,yield strength of reinforcing bar,concrete strength,which is similar to other base.Its bond stiffness is bigger and the degraded speed is slower than other base by the comparison of load-slip curves.