A PROPOSAL OF A NEW METHOD TO IMPROVE FLEXURAL DUCTILITY FOR REINFORCED CONCRETE COLUMN SUBJECT TO HIGH AXIAL LOAD

Abstract

In this paper, a new method to improve flexural ductility of reinforced concrete column is proposed. This new method is to add peculiar longitudinal bars symmetrically wrought so as to be effective against compression but not effective against tension. The members with those additional bars may have the same performance as the ones in which the longitudinal bars are arranged eccentrically presented in the previous paper while they keep symmetrical section required to the interior column. Their seismic performance was investigated empirically as they were compared with the ordinary members'. According to the authors' expectation, the proposed method greatly improves the ductility of the members.