Author(s)

P.O. Papadopoulos

Abstract

In order to investigate the dependence of the ductility of a concrete column on its confinement by transverse reinforcement, a part of a column, subjected to axial compression, between two successive confined sections, is simulated by a plane truss, with bars obeying non-linear a-e laws of concrete or steel The equilibrium conditions are written with respect to the deformed structure, so that instability phenomena are taken into account. The proposed model is applied on a column with square section, first unconfined and then with increasing confinement, for various values of spacing of transverse reinforcement. Finally, a method of preliminary design, based on the truss model, is proposed, for the preestimation of minimum required section of transverse reinforcement assuring ductility. 1 Introduction During the response of a tall reinforced concrete frame to a

Keywords