Analysis of Reinforced Concrete Brackets Strengthened by Carbon Fiber Sheet

Abstract

In current paper studies the efficiency of using unidirectional carbon fiber sheet reinforced polymer as an exterior strengthening procedure toward rise the load carrying capacity of current reinforced concrete brackets exposed to repeated load. For this purpose, four specimen normal weight reinforced concrete double-sided brackets are cast, three of them are supported with carbon fiber stripes and one as a control specimen. The variable studied is: orientation of carbon strips. It is found that the outside strengthening with carbon strips improved the load capacity of brackets under repeated load are (15%, 8% and 15%) for all bracket wrapping horizontally, only flexural region wrapping of bracket and inclined wrapping for bracket by (45⁰) orientations respectively as compere with control specimen. While decrease the deflection capacity of brackets under repeated load are (26.16%, 25.50% and 27.27%) for all bracket wrapping horizontally, only flexural region wrapping of bracket and inclined wrapping for bracket by (45⁰) orientations respectively as compere with control specimen.