Studying Shear Behavior of Self Compacting Concrete T- Beams Strengthened With Carbon Fiber Reinforced Polymer Sheets

Abstract

The investigational program consists of testing ten simply supported T- beams molded by using Self Compacting Concrete (SCC) with two point loads.All beams have the same dimensions (1500 * 300 * 100) mm and flexural reinforcement. In this study three parameters were considered: shear span to effective depth ratio (a/d), the shape of CFRP sheets and distribution of CFRP sheets.The specimens were divided into two groups (A and B), Group A with (a/d) equal to 2.5 and group B with (a/d) equal to 3. Each group involves five beams strengthened by CFRP strips. In addition to eight Self Compacting Concrete (SCC) beams strengthened by Carbon Fiber Reinforced Polymer (CFRP), there were two reference beams. These reference beams had no strengthening by CFRP strips. All ten beams were made of SCC with fʹc equal to 40 MPa.The experimental results indicated that the Strengthened with (U) shape on the web only get good resistance to the shear force with shear span (a/d = 2.5) more than Shear span (a/d = 3) when we applied two-point load on the spaceman .Keywords: Self-Compact Concrete (S C C), Carbon Fiber Reinforced Polymer (C F R P), Shear Failure crack, Shear Force, T-Beam