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Bond Splitting Behavior of RC Members

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Reference (Report of Japan Concrete Institute TC Activities publicated in Bond in Concrete 2012): Japan Concrete TC Activities on Bond Behavior and Constitutive Laws in RC Part 1: Research Survey on Bond Problems Part 2: Theoretical Behavior by Bond Laws Part 3: Application of Constitutive Laws for FEA It is important for Reinforced Concrete (RC) structures to behave together with reinforcements and concrete. High strength reinforcements, large amount of longitudinal bars, low strength concrete, etc. cause splitting of surrounding concrete and decrement of ductility of RC members. To avoid bond splitting failure, it is necessary to know details of bond mechanism between reinforcements and concrete.

Test Method Bond test is conducted by pulling out of reinforcements from concrete block. The concrete block has slits to lead to splitting of surrounding concrete.

Bond Splitting Failure Splitting cracks along the slits are observed.

Test Method 2 To simulate behaviors in actual RC members, bond test is conducted by concrete block specimens, which have one combination of longitudinal bars and lateral reinforcements. The lateral reinforcements are subjected tensile force by oil jacks.

Bond Splitting Failure Splitting cracks along the slits are observed.

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