Tensile performance with bending of CFRP tendons used in civil engineering

For the tensile performance with bending of carbon fiber reinforced polymer (CFRP) tendons in the process of civil engineering, a new tensile strength test method was developed for CFRP tendons, and the actual tensile strength with bending of CFRP tendons was tested through model testing corresponding to several bending angles.The tensile strength reduction factors of CFRP tendon used for civil engineering corresponding to bending states were obtained, and an empirical formula of the reduction factor was fitted at last.Results show that tensile strength of CFRP tendons tested by the new method is more than 9% higher than the results based on ordinary method.The empirical formula presented in the paper can effectively predict the tensile strength reduction factor with bending.When the bending angle is 3°, the tensile strength with bending drops by 18.9%.Therefore, even if a small bending angle exists, the reduction of tensile strength should not be ignored during the application.