Tensile and Bond Behaviour of GFRP Bars under Various Load and Temperature Conditions

A study of existing research shows a need for an investigation of the tensile and bond properties of glass fiber-reinforced polymer (GFRP) bars at low and high temperatures varying between about -40oC and glass transition temperature. Study of the response of GFRP bond members at various temperatures is also essential for understanding the bond behaviour of GFRP-reinforced structural members. For this study, 55 tensile test specimens and forty cylinders reinforced with GFRP were constructed and tested under direct tension and standard pullout bond test, respectively. The influence of temperature on tensile properties and bond performance of GFRP bars is analyzed and reported. The bond strength of the GFRP bars under high temperatures was determined to be between 58% and 88% of the bond strength of the same bar at room temperature, while the tensile strength was found to be between 68% and 73% of the tensile strength at room temperature.M.A.S