A novel FRP composite with high-strength, high extensibility in tension: 1-D constitutive relation

A FRP reinforcement has been developed to deliver desired nonlinear stress–strain responses upon various demands for reinforcements in Civil Engineering. The application of this FRP reinforcement will get rid of corrosion and achieve favourable interactions between reinforcement and other structural materials, suggesting a new paradigm especially for reinforced concrete elements. Suitable numerical models in aid of guiding their fabrication upon diverse demands are essential but yet presented. In this paper, a simple but robust one-dimensional (1-D) constitutive model has been developed for predicting the behaviour of the FRP reinforcement under the tension. The proposed model considers a detailed description for the 2D arrangement of the FRP reinforcement that characterizes the texture by non-linear beam-column and bar elements. The model has been validated by experimental measurements and sophisticated FE models. It is shown that the use of proposed model allows the consideration of different loading behaviour and energy absorption processes upon increasingly updated demands for more sophisticated and efficient FRP reinforcement in the future.