The Finite Element Non-linear Analysis For Carbon Fiber Plastic Reinforced Concrete Beams

As a new and high-technique construction reinforcement method for reinforced concrete structure, Carbon fiber-reinforced plastic(CFRP) has many advantages such as high research value and popularizing value, it can bring huge social and economy benefit . The existing reinforced concrete structures can be strengthened by adhering carbon fiber-reinforced plastic to the concrete surface to improve their mechanical performances. The advantages of CFRP such as lightweight, non-corrosive, high tensile strength and easy construction make it widely used in strengthening field. The maturation of Finite Element Calculation Theory provides a computing tool to the reinforcement method. The finite element method (FEM) can simulate the Non-Linear Full-Range Analysis-the behavior of beams from linear to nonlinear responses and up to failure, it can save lots of human resource and material.Firstly, this paper summarizes the domestic and international current research situation and results of CFRP reinforcing the concrete structure at present, and summarizes the material performance of FRP systemically. Then from the strain-stress relationship of RC materials, the Failure Criteria, Failure Surface and various Failure Model of concrete are discussed respectively.Secondly, all element types needed in Non-liner Finite Element Analysis (NFEA) of RC beam structure and carbon cloth in ANSYS are studied. Simulation of R-C beam and reinforced concrete structure is conducted in the ANSYS (a kind of FEA software), and the analysis and study of reinforced concrete beams strengthened with CFRP under the different gluing numbers are done. The load-displacement curves, the ultimate loading of RC beam and the deformation are presented and compared to the experimental results. Deviation reasons are analyzed and suggestions are given. The numeric results are compared with experimental data, which shows the modeling method is available and the outcome is reliable. It can be concluded that CFRP reinforcing concrete can be widely used in strengthening field.Finally, this paper also presents a way and direction for the further study on this problem in future.