Experimental Study And Theoretical Analysis On Flexural Behavior Of Concrete Beam Reinforced With FRP Tendons

As a traditional eminent building material, steel-reinforced concrete is widely using in modern structure. However, despite this, the problem of poor durability still exists in the steel-reinforced concrete structure in atrocious environment. For this reason, various countermeasures have been studied, but they don't prove satisfying. Now the FRP-tendon-reinforced concrete becomes one of the researching hotspot in the world wide because of FRP tendon's preferable durability in corrosive environment and its high strength.Aimed at finding out the Flexural Behavior, four simple-supported beams reinforced with AFRP bars and five ones reinforced with CFRP bars have been tested in static load experiment. The ratio's effect on breaking modality was concerned in this experiment, involving the cracking load, the development of crack, the assuming plane sections remaining plane, load-deflection curve, the development of strain of AFRP reinforcement, and ultimate load.Based on the experiment research, a method to calculate the bearing capacity is put forward involving the formula to calculate minimum ratio, the formula to calculate the anti-crack behavior and one to calculate the stiffness. Compared with the result of experiment, those formulas prove to be effective and accurate.Lastly, based on the characteristic of concrete beams reinforced with FRP tendons, the design method that is controlled by crack resistance capacity and took into account the bearing capacity are produced, involving the formula to calculate the design load of concrete beams reinforced with various ratio FRP bars, the formula to calculate the limit ratio controlled by crack resistance capacity.