PUNCHING SHEAR STRENGTH PREDICTION OF FRP-REINFORCED CONCRETE FLAT SLABS

摘要

The Canadian Standard Association provided its first punching-shear equation in the new edition of the CSA S806-11 which represented a step forward in designing the FRP-RC flat slabs and parking structures. This paper evaluates the accuracy of the available punching-shear equations for FRP-RC flat slabs. The accuracy of the design equations was assessed through the comparison against the experimental results of 43 FRP-RC flat slab prototypes. The prototypes had an effective depth ranging from 55 to 284 mm and a concrete compressive strength ranging from 26 to 49 MPa. The prototypes were reinforced with glass and carbon FRP bars and'grids with a reinforcement ratio ranging from 0.15 to 3.00 %. The JSCE-1997 and CSA S806-11 showed good yet conservative predictions with an average V_(test)/V_(pred) of 1.18±0.15 and 1.12±0.18 and corresponding COVs of 13% and16%, respectively.