چكيده لاتين :
The curiosity to understand the behavior of confined concrete columns has led researchers to carry out extensive experimental work over the years . Numerous empirical confinement models have been reported in the literature for the prediction of stress-strain response of the
columns behavior under concentric loading, though, nothing significant has been said about the numerical modeling of the problems wherein the nonlinear response of confined concrete columns may be reasonably predicted. In the pre sent study, material models for both concrete and steel have been formulated and nonlinear finite element analysis of threedimensional confined concrete models has been carried out. The analysis included the provision s for cover spalling. A couple of examples have been presented for the validation of the numerical methodology proposed in this work. A parametric study has also been carried out to find out the effect of different parameters like concrete
strength, reinforcement configuration, spacing of lateral ties and type of cross-section on the response of the confined concrete columns. The parametric study revealed some very important observations regarding the behavior of confined concrete columns.
