Finite Element Analysis On Flexural Behaviors Of CFRP Reinforced High-strength Concrete Beam Under The Second Load

Retrofitting is a sunrising industry in recent years, while the Carbon fiber (CFRP) as a reinforced concrete structure reinforcement technology have many advantages, such as reinforced by its lightweight, high strength structural characteristics that can improve the mechanical properties of the structure,it has been attached in the field of civil engineering and widely used. At home and abroad there are a lot of relevant research results. but many of them are studied by the test method for ordinary reinforced concrete structure in the case of force by the first time. With the development of computer, finite element numerical methods in nonlinear analysis of reinforced concrete structures are widely applied. In this paper, it will use the finite element software ANSYS to make simulation of the secondary load under high-strength CFRP reinforced concrete beam flexural properties.First, the summary of the CFRP reinforced concrete structure and application of high strength concrete on the current situation at home and abroad will be made on wide and much reading about its previous experimental data. A brief analysis of CFRP Reinforced Concrete Beam works modes and reinforced concrete beams strengthened with CFRP failure modes is summed up. According to the basic assumptions and the constitutive material derived, a formula for calculating CFRP Reinforced concrete beams flexural capacity under the force and the second force is analysized.Secondly, it introduces the basic theory of finite element software. In the finite element madal analysis,unit types and units of the bond between yeild and failure criterion are analysed in detail.Thirdly,we use the finite element analysis software APDL language program to establish finite element model of the Carbon fiber reinforced concrete beam and to simulate the secondary load by the finite element software ANSYS software. The results contrast with the literature, analysis of CFRP reinforced concrete beam flexural capacity. The results showed that a subject flexural capacity of reinforced concrete beams under force after carbon fiber reinforced significantly improved by strengthening the secondary beams under the force of ultimate bearing capacity increase was modest, and the stiffness of concrete beams increase more significantly. Finite element analysis results are in good agreement with the experimental results. Therefore, finite element model shows that the establishment of this article is more reasonable and further studied. Based on this, the factors influencing the effect of carbon fiber reinforced:the CFRP layers, reinforcement ratio, bond length, anchoring situation to do the analysis, are patientlly considered so that the actual project to achieve the best reinforcement effect.Finally, the theoretical analysis and numerical simulation of this paper are summarized and some conclusions are drawed out. Discussions about further research, research ideas and direction are made.