Análisis de la resistencia de la junta traslapada simple, entre el acero estructural, resina epóxica y fibra de carbono unidireccional, utilizado para reforzamiento de vigas de acero

Abstract

Carbon fiber is a material that provides excellent properties in different situations, one of these is structural reinforcement, due to the fact that it increases the resistance and stiffness of the structure without adding dead loads. One way to bond carbon fiber to steel is by means of epoxy resin which will create an adhesive bond; however, detachment can occur. According to previous research, spalling occurs because of the shear strength of the adhesive. Therefore, we proceeded to improve the shear strength of the adhesive bond by applying four surface treatments to the steel layer, these were manual cleaning, grinding disc, sanding disc and sandblasting. Comparing the results obtained, it was demonstrated, through real tests, that the roughness of the steel is directly proportional to the shear strength of the bond. Due to this, the Sandblasting treatment was the one with the best results due to its high degree of roughness with an average value of 10.79 μm and a maximum shear stress of 10.72 MPa.