EXPERIMENTAL ANALYSIS OF INTERFACE BETWEEN CFRP AND CONCRETE USING CYLINDRICAL SPECIMENS

摘要

In this work an experimental methodology to determine the bond capacity of the interface between CFRP sheets and concrete was investigated. The test setup has been developed to reproduce in a more realistic way the pure mode II fracture behavior of the interface under shear and to evaluate the maximum load capacity of this interface. Cylindrical concrete specimens, also used in tests for compressive strength, have been adapted in this study. Two concrete cylinders are placed end-to-end, bonded with FRP and pulled apart. The tensile load, which separates the cylinders, subjects the FRP-concrcte interface to shear. The results obtained for static, cyclic and long term loadings indicate that the method is promising and of practical interest. In this paper the results of the static loading tests are discussed.