Title: Modified Failure Criterion to Predict Ultimate Strength of Circular Columns Confined by Different Materials

Author(s): Z. Canan Girgin

Publication: Structural Journal

Volume: 106

Issue: 6

Appears on pages(s): 800-809

Keywords: confinement; fiber-reinforced polymers; reinforced concrete; sheet; strength; tube

DOI: 10.14359/51663181

Date: 11/1/2009

Abstract:
This study addresses the extension of a failure criterion developed for rock data to small or near full-size circular concrete columns confined by different materials. Initially, a wide range database on small-scale specimens confined by fiber-reinforced polymer (FRP) sheets or tubes and analytical studies were evaluated to predict the ultimate compressive strength. Then, the reinforced concrete (RC) short-columns retrofitted with FRP jacket were examined through available data. The research further covers middle- or near fullscale columns confined by FRP composites and steel reinforcement. All of these estimations were conducted within a unified approach to the failure criterion. Thus, the ultimate compressive strength for different confining materials can be predicted easily and systematically.