Finite Element Analysis Of Reinforced Concrete Beams Strengthened With Prestressed BFRP Mesh

With the passage of time,structural damage such as concrete carbonization and steel corrosion will inevitably occur in the building,resulting in problems such as insufficient bearing capacity and limited use functions of the original structure.Faced with this series of problems,how to adopt efficient and stable reinforcement technology is a key research topic in the Reinforcement and transformation field.Based on ABAQUS,this study explores the flexural properties of RC beams strengthened with prestressed basalt fiber reinforced polymer(BFRP)grids,the effect of prestress on cracks is also explained.The main task done and the main conclusion obtained are as follows:1)The correct constitutive model was selected and the model was verified2)A total of 9 beam members were designed in this research.Firstly,static loading was applied to 1 original beam and 3 reinforced beams with different reinforcement layers.After comprehensively considering its flexural capacity and reinforcement efficiency,it is finally determined that the optimal reinforcement layer number for BFRP grid-reinforced RC beams is double.On the premise of the optimal number of reinforcement layers,5 reinforced beams were added,and the grid thickness and prestress were used as independent variables to explore the flexural performance of members in terms of flexural bearing capacity,stiffness,ductility,and cracks.The Numerical Simulation show that the beam with a large BFRP grid thickness has higher flexural bearing capacity than a reinforced beam with a small grid thickness,and the stiffness and ductility are improved;The application of prestress effectively reduces the deflection of the beam,and at the same time it also delays the development of cracks in the beam.3)Theoretical analysis of the flexural behavior of RC beams strengthened with prestressed BFRP grids,including theoretical calculations of yield load and ultimate load.The deviation between the simulated and the theoretical value of the beam flexural bearing capacity is within 15%.Figure 73;Table 18;Reference 56...