Finite Element Analysis On Flexural Fatigue Behavior Of Reinforced Concrete Beams Strengthened With Basalt Fiber

As the existing bridge to meet or exceed the useful life, as well as the bridge by a human orthe external environment in their operations against our country at present. It is a certaininfluence on the normal use of the bridge structure. There are a lot of the existing bridge urgentneed of accurate detection and timely maintenance and reinforcement. In traditionalreinforcement methods based on the research and development of new, more effectivereinforcement and reinforcement materials has become a bridge reinforcement at home andabroad and testing areas of research focus on recent years, fiber composite materials for its lightweight, high strength construction process is simple, does not change the structure shape, andeconomic effects, has become widely accepted in the field of civil engineering reinforcement.Basalt fiber cloth is a good project performance, a new type of fiber composites. Basalt fibercloth with high strength, acid and alkali resistance, chemical stability, high temperature, fatigueresistance and other performance characteristics. Basalt fiber cloth reinforcement in reinforcedconcrete bridge applications in the theoretical analysis and experimental exploration of the initialresults, and analysis of computer simulation studies have yet to be further deepening anddevelopment. Basalt fiber application technology in the field of civil engineering structuresreinforced the status quo, based on fiber sheet reinforced concrete structure of the theory andtechnology research, and analysis of reinforced concrete beam bending fatigue mechanism onthe basis of previous research, and using the f ANSYS established a reinforced concrete beamfinite element model, the fatigue of reinforced concrete bridge were simulated and analyzed.Through analysis of data to determine the basalt fiber sheet after the bending fatigueperformance of reinforced concrete beams effectively improve,and the original reinforcedconcrete beams have been effectively reinforced. In this paper, the specific process is as follows: First of all, the original reinforced concretebeam unused Basalt Fiber Reinforced solid state numerical simulation of the contours of thestress and strain of the original reinforced concrete beams under concentrated loads and thecorresponding load-deflection curve, and numerical analysis calculation results and laboratorytest results were analyzed to determine the reliability of reinforced concrete beam finite elementmodel established. Then, before and after basalt fiber sheet reinforced concrete of the use of thefinite element model, the resistance to bending fatigue analysis and fatigue life prediction,bending fatigue performance has been improved. Finally, the reinforcement properties of basaltfiber cloth and carbon fiber cloth and reinforcement of economic cost comparison analysis,further evidence of the basalt fiber cloth works the economic value and the value of engineeringapplications.By the numerical simulation analysis to determine the feasibility of Basalt Fiber Reinforcedand effectively improve the bending fatigue performance of beams, provides an importantreference for the basalt fiber cloth reinforcement in the bridge project, and basalt fiber clothreinforcement in the bridge The promotion of the project has played a positive significance.