GFRP-Concrete Composite Beam With Finite Element Analysis

In order to solve the security hidden danger and economic loss caused by corrosion of steel bar in reinforced concrete structure,FRP- concrete composite structure with high strength,corrosion resistance,low maintenance and so on arises at the historic moment.At present,the research on the structure of FRP- concrete composite beam in China mainly adopts the method of experiment or theoretical calculation,but the research in the aspect of finite element analysis is not deep enough,and needs to be improved.Consequently,this paper uses a theoretical analysis based on ANSYS finite element method to simulate and analyze for a new type of GFRP concrete composite beam shear and flexural properties, and comparatively analyze with the theoretical calculation results.The main work and achievements are outlined as follows:(1)Analyzing of the common shear failure modes of GFRP- concrete composite beams based on the calculation method of "Code for design of concrete structures" GB50010-2010 to calculate the shear strength of composite beams.(2)According to the section form,size and parameters of the new composite beam,the results of the simplified calculation in the construction stage and using stage conform to specifiedrequirements. At the same time,through the calculation and comparison to study the effects of different factors on the mechanical properties of composite beams.(3)The paper analyzes the deflection of composite beams,maximum stress of concrete top layer and maximum stress of fiber material according to ANSYS finite element analysis and the research results of the existing cantilever model.Comparing of simulation results and calculation results shows the error size and compares the error value with the existing error value,the results show that the simulation results are more accurate than those without considering the slip.(4)The paper analyzes the flexural behavior of composite beams by the method of cantilever model analysis in four point bending simulation analysis and improves the constraints on its basis in order to alleviate stress concentration problem,and analyzes the performance of composite beams.