Compressive Strength Prediction of Square Concrete Columns Retrofitted with External Steel Collars
Abstract: Transverse confining
stress in concrete members, commonly provided by transverse reinforcement, has
been recognized to enhance strength and ductility. Nowadays, the confining
method has been further developed to external confinement approach. This type
of confinement can be used for retrofitting existing concrete columns. Many
external confining techniques have been proven to be successful in retrofitting
circular columns. However, for square or rectangular columns, providing
effective confining stress by external retrofitting method is not a simple task
due to high stress concentration at column’s corners. This paper proposes an
analytical model to predict the peak strength of square concrete columns
confined by external steel collars. Comparison with the experimental results
showed that the model can predict the peak strength reasonably well. However,
it should be noted that relatively larger amount of steel is needed to achieve
comparable column strength enhancement when it is compared with those of conve
tional internally-confined columns.
Author: Pudjisuryadi, P.,
Tavio
Journal Code: jptsipilgg130008
