STUDY ON SHEAR STRENGTH DEGRADATION OF SINGLE REINFORCED CONCRETE COLUMNS UNDER REPEATED LARGE DEFORMATION

Abstract

The present paper deals with shear strength degradation of reinforced concrete columns under repeated large deformation. In the first, a discussion focuses on a degradation model of shear strength accompanying large repeated deformation far beyond the yield point of the main reinforcement. The shear-degrading curve proposed by Priestley et al. is extended to a case of random deformation history of strong seismic actions. And we evaluated the degradation of shear strength during the dynamic random process of reinforced concrete columns to use the cumulative damage model.