Effect of pre-tensioned level on axial stress-strain behaviour of confined concrete: A review

Abstract

External passive confinement has been used as strengthening scheme to rehabilitate existing reinforced concrete buildings. Passive confinement requires a certain lateral dilation of concrete prior to the activation of the confining effect. Applying pre -tensioned force to the confining material can eliminate the needs of such lateral dilation. This paper presents a review on previous studies conduct ed about pretensioned level in confined concrete. A short discussion is done based on the effect of pre -tensioned level to the three regions of stressstrain curve. It was found that pre-tensioned level affects the stress-strain behaviour of confined concrete. Pre-tensioned level that is too high decreases the strain capacity of the confined concrete. This review suggests that there exists an optimum pre-tensioned level for each confining material.