Study On Bonding Behavior Between Basalt Fiber Reinforcement Plastic And Concrete

At present,basalt fiber bars(BFRP bars)have been gradually applied in concrete projects.A lot of research work has been carried out on the adhesion of glass fiber bars(GFRP bars)and carbon fiber bars(CFRP bars)to concrete.This article focuses on BFRP bars and concrete.Bonding properties were studied specifically.In this paper,a series of center pull-out tests of BFRP bars and concrete are completed.The influence of BFRP bar diameter,bond length and concrete strength on the bondability between BFRP bars and concrete is analyzed,and the distribution law of anchorage variables along the buried length is established.The slip-slip constitutive relation gives the mechanism of the bond-slip force between BFRP tendons and concrete.Secondly,the calculation method of the anchorage length of BFRP bars in concrete was studied,and the force equation of the differential element of BFRP bars concrete drawn specimens was established.Combined with the improved BPE model,the BFRP bars with sliding position and tension stress were established.The theoretical formula for bond stress.Finally,on the basis of comparative analysis of test results,the formula for calculating the minimum anchorage length of BFRP bars is given.