EFFECT OF TAPERED END AND SPEW FILLETON INTERFACIAL STRESSES IN BEAMS REINFORCED WITH A CFRP PLATE

The adhesive bonding technique has been widely used in construction as an alternative of conventional jointtechniques. Spew fillet and tapered plate are suggested to reduce the stress concentration in the adhesive layer of retrofittedbeams. Finite element (FE)analysis was employed to determine the effects of the spew fillet and the taper on interfacialadhesive stresses. The cases, including squaredend, outside taper, inside taper and withfillet, have been considered. Theresults of the FE analysis show that the adhesive stresses in the upper and the lower interfaces are different due to thesingularity at the adhesive corner. Both tapers and spew fillet can reduce the adhesive stresses. The spew fillet is better thantapers in reducing the normal stress, but the inside taper is more effective in reducing the shear stress than the fillet. Theresults also show that the results largely agree with the findings on lapjoints, but the effect of spew filletsisfar less thanthatfor lap joints.