Experimental Research And Theoretical Analysis Of Behavior Of Concrete Beam Reinforced With FRP Bars

Fiber reinforced plastics (FRP) bar is a composite material made of continuous fiber. Application of conventional reinforced concrete structures is limited due to rust of reinforcements, and yet it is an effective approach to substitute for ordinary reinforcements with FRP bars, which are provided with high strength and better corrosion resistance. However, FRP bars have the characteristics of low elastic modulus, liner elastic stress-strain relationship, weak lateral shear strength, and different adhesive property between FRP bars and concrete, which produce much unlikeness in structural performance between conventional reinforced concrete members and concrete members reinforced with FRP bars, so calculating and design methods applicable to the former are inapplicable to the latter. With 45 specimens in total conducted, and results of 20 specimens in domestic and foreign documents referred to synchronously, experimental research and theoretical analysis of mechanical behavior of concrete beams reinforced with FRP bars have been made since 2003. Researches dealt with in this paper are: bolding performance of FRP bars in concrete, calculation and control concerning deflection and crack width , as well as ductility analysis of non-prestressed concrete beams reinforced with FRP bars, mechanical behavior and finite element analysis of prestressed concrete beams based on the pattern, namely " partially-prestressed and partially-bonded", calculation and design of bearing capacity, and non-linear finite element analysis of bending behavior of prestressed concrete beams reinforced with FRP bars, and so on. Major research contents and contributions are as follows:1. Research on bonding performance between FRP bar and concreteBased on the pullout tests of 30 specimens, bond-slip mechanism between FRP bars and concrete is studied, and differences in bond-slip behavior between FRP bars...