USE OF U-WRAP TO OVERCOME CONCRETE COVER DELAMINATION IN VARIOUS SIZES OF BEAMS USING STRUT AND TIE MODELLING

Abstract

Reinforced concrete beams reinforced with Fiber Reinforced Polymer (FRP) have several failure patterns, one of which is Concrete Cover Delamination. To prevent this failure, in this study, FRP U-Wrap was installed which was calculated using Strut and Tie Modelling (STM). The specimens of reinforced concrete beams with a length of 3300 mm, a width of 300 mm, and variations in height of 500, 600, and 700 mm were loaded with the two-point load method. Data collection and analysis was carried out using Digital Image Correlation, LVDT, strain gauge, and data logger. The bending behaviour reviewed in this study is ductility, crack pattern, type of failure, flexural capacity, and stiffness. In this study, the addition of U-Wrap did not have a significant effect on flexural behaviour when compared to beams without U-Wrap FRP. All beams experienced a failure pattern of FRP Debonding, so that the Concrete Cover Delamination did not occur.

Keywords

• frp u-wrap
• concrete cover delamination
• strut and tie modelling
• ductility
• crack pattern
• failure type
• flexural capacity
• stiffness
• frp debonding.