BOND CAPACITY OF STEEL REINFORCED CONCRETE COMPOSITE SHORT COLUMNS

This paper presents the results of an experimental study and a nonlinear finite element method analysis on bond-slip behavior between structural steel and concrete. The test study on the bond behavior concerned 12 specimens with the different configuration. Key parameters measured were bond stress and slip between steel shape and concrete. The slip of steel shape at the free end and the fixed end of specimens were measured and recorded. Based on the experimental results, the bond mechanism between steel and concrete is analyzed. The effect of some parameters, such as cross section dimension, bond length, concrete strength, thickness of concrete cover and the rate of stirrup lateral, is discussed on the bond behavior and the bond capacity. The distribution mode of bond stress is also noted. Then finite element model introduced double spring elements is set-up to further study of bond behavior between steel shape and concrete, which would be reference to calculation of bond strength and ultimate capacity of SRC columns subjected to axial loads.