Experimental Study on Strengthening of Steel Plates in Tension with CFRP Strips

摘要

In this study, steel plates strengthened by bonding CFRP strips, and two steel plates butted each other on which CFRP strips were bonded were loaded in tension; the number of CFRP layers, the yield strength of steel materials, and adhesives were varied. The slit between two steel plates butted each other simulated a crack in steel plates. Then, the strength of adhesive related to the peeling failure of CFRP and the effects of bonded CFRP strips on the stress reduction in steel and relative displacements between two steep plates, i.e., crack opening displacements, were investigated. The yield strength of steel material affected the stress distributions in the adhesive layer, and peeling failure of CFRP strips. In addition, it was concluded that the material properties of adhesive have influences both on the peeling failure of CFRP strips and on the crack opening displacements.