Connection of precast shear wall panels using carbon fiber composites and adhesive anchor bolts

A fiber reinforced plastic (FRP) composite connection and the design methodology for the composite coimection were developed through the testing of nine precast wall panel assemblies. The final connection design consists of an 18x24 inch composite lay-up, epoxy bonded to the concrete wall surface. Four Hilti epoxy anchors were placed in strategic locations to prestress the concrete to resist shear cracking in the concrete just below the connection surface. A design value for the connection of 50 kips was determined from the data and finite element analyses. Correlations between the design methodology and test data indicate that the design methodology equations accurately predict the connection capacity. The connection is an economical solution for retrofitting precast concrete wall connections and other precast concrete elements which require in-plane shear transfer strengthening. The composite connection will become a viable option for new construction as material cost decreases and the interaction between FRP composites and concrete is better understood.