Punching shear behaviour of slab-column edge connections reinforced with fibre-reinforced polymer (FRP) composite bars

• Main Author: ElGendy, Mohammed
• Other Authors: El-Salakawy, Ehab (Civil Engineering)
• Published: Canadian Society of Civil Engineering 2014
• Subjects: FRP; GFRP; edge; slab-column connection; punching; shear studs; flat plate; slab; shear; code equation
• Online Access: http://hdl.handle.net/1993/24092

The use of fibre reinforced polymer (FRP) composites as an alternate to steel has proved to be an effective solution to the corrosion problem. However, FRP bars have low axial and transverse stiffness compared to steel bars which results in a lower shear capacity of FRP reinforced concrete (RC) elements compared to steel-RC elements. Flat plate systems are commonly used to take advantages of the absence of beams. They, however, are susceptible to punching shear failure where the column suddenly punches through the slab. An experimental program was conducted to investigate the punching shear behaviour of slab-column edge connections. Nine isolated full-scale slab-column edge connections were constructed and tested to failure. One connection was reinforced with steel flexural reinforcement, six with GFRP flexural reinforcement and two with GFRP flexural and shear reinforcement. The parameters investigated were the flexural reinforcement type and ratio, the moment-to-shear ratio and the shear reinforcement spacing.