Study On The Bearing Capacity Of Fiber Reinforced Concrete Beams Strengthened With FRP

Fiber reinforced polymer(FRP)has been widely used in engineering,fiber reinforcement technology refers to the use of high-performance binder paste fiber reinforced composite materials on the surface of component,when structure load increases,the two work together,can improve the bearing capacity of the component,thus to achieve the effect of reinforcement reinforcement.In this paper,Results show that the finite element analysis results was consistent with the experimental results,and verify the correctness of model.The beams reinforcement effect of GFRP strengthened concrete under different initial loads is studied,after the steel yield on the reinforcement with GFRP cloth,the bearing capacity of the reinforced concrete beam is improved obviously.Analysis of concrete beams under different load in the midspan cross-section stress situation,with the increase of load,tensile area scaling up unceasingly,the compressive zone is nonlinear,the stress in GFRP continue to increase until damage.Carbon nanotubes is a graphite crystallization of nano materials.Its light weight,has a number of mechanical,electrical and chemical properties,needing further research.Because of multi-walled carbon nanotubes relative to the single-walled carbon nanotubes performance is good,price is low,used to enhance material by scholars for research.Adding carbon nanotubes reinforced concrete beam,the beam has been shown to improve mechanical properties,carbon nanotubes parameters such as strength,elastic modulus of concrete beams,according to the laws of the hybrid composite elastic superposition principle work out.The finite element analysis model of beam reinforcement is established by using ANSYS doped carbon nanotubes by GFRP,GFRP and Reinforcement Analysis of reinforced concrete beams of concrete beams,not strengthened,to study the failure process and bearing capacity,the beam along the height of cross section stress distribution.Analysis of carbon nanotubes length to diameter ratio on carbon nanotubes reinforced cement(concrete)the influence of stress distribution,it is concluded that when the length to diameter is larger is conducive to play a high elastic modulus of carbon nanotubes,improving the mechanical properties of composite materials.