ANALYSIS OF ROTATION AT END OF REINFORCED CONCRETE MEMBERS CONSIDERING SUBSIDENCE

Abstract

When reinforced concrete members are subjected to bending moment, rotational deformation occurs in their ends. That deformation is generally considered to result from a slip of longitudinal bars, and some methods to estimate the rotational angle have been proposed. On the other hand, although a phenomenon that the members subside into the beam-column joints is observed, it has not been investigated. In this paper, it is insisted that the deformation results from a reciprocal action of the subsidence and the slip. A model to estimate the rotational angle considering the subsidence is proposed, and it gives good agreement with test results.