Abstract
It is necessary to know the bond behavior between concrete and reinforcement in tensile zone of the section in order to analyze the elasto-plastic deformation characteristics of reinforced concrete columns. In this paper, the bond tests were carried out by using the reinforced concrete columns which have the same section as the specimens of bending tests and the method of analysis in consideration of bond is presented based on the results of the bond tests. Concrete between cracks heightens axial rigidity of reinforcement and this function can be represented by the suppositional force which works in the section at the position of the reinforcement. The relations between the suppositional force depending on the bond stress and strain of the reinforcement are modified from the test of reinforced concrete columns subjected to repeated axial tension and compression. The result of the analysis which is presented in this paper on this model agree with the experimental results of reinforced concrete columns subjected to pure bending moment and changing axial force.
