Author(s)

Panagis G. Papadopoulosv & Hans C. Xenidis

Abstract

A truss model with structural instability, recently proposed for the confinement of concrete columns, is compared with the requirements of Uniform Building Code and New Zealand Standards, as regards the amount and spacing of transverse reinforcement. The truss model is found in a satisfactory approximation with the UBC. Whereas the NZS require a larger amount of transverse reinforcement, by assuming that this compensates the ductility loss due to a possible heavy axial compression. ^Introduction The last twenty-five years, a lot of test results and empirical formulae, based on them, have been published, concerning the confinement of concrete columns [1, 2, 5-7]. The above have been taken into account in the formulation of requirements of various seismic codes [3, 8]. Recently, a theoretical truss model has

Keywords