Specifics of testing and fracture behavior of fibre-reinforced polymer bars

Monitoring and testing of buildings and structures

The article contains the results of tensile testing of different types of FRP samples, the character of their destruction, dependence of the strength and elasticity module on the bars diameter. The results are compared with the calculated values of tensile strength of steel reinforcement. Based on these results we arrived at conclusions about the comparability of the design values tensile strength of FRP with high-strength steel grades A -V and A -VI at much greater elasticity module at last. As a result, the use of FRP reinforcement carrier bent constructions can be possible only in the preliminary reducing deformation reinforcement (its prestressing), or its significant overruns. It was concluded, that further improvement of manufacturing FRP technology should be directed to increase, primarily from the module of reinforcement elasticity, rather than its tensile strength.