GFRP reinforcement bars with high corrosion resistance, is increasingly used to replace steel reinforcement in coastal constructions. In addition, due to the properties of GFRP reinforcement, it has a lower elastic modulus than the reinforcement, leading to the conditions corresponding to the service limit state, especially the deflection, which often plays a decisive role while designing the GFRP reinforced concrete beam. While in Vietnam there is currently no standard calculation applied to GFRP reinforced concrete structures. This paper presents the results of analysis and evaluation of deflection prediction models of GFRP reinforced concrete beams. Based on the database of 115 beams from previous studies and 09 beams conducted by the author. In addition, using the nonlinear regression analysis method, an adjusted model has been proposed that gives more consistent deflection prediction results than current prediction models.

Keywords: Glass fiber reinforced polymer bar; Deflection; Flexural behavior