Study On Anti-shear Performance Of GFRP-concrete Combination Structure Connected By Open-hole Plate

As a new type of composite material,FRP has the advantages of light weight,high strength,high specific strength,and good corrosion resistance.In the field of structural engineering research,FRP materials and their combined structures have become an important research direction.The GFRP-concrete composite structure is a composite structure in which GFRP members and concrete are placed into a whole and jointly stressed.It can give full play to the excellent properties of GFRP materials and concrete.In this paper,the GFRP perforated plate connector is used as the connection method of the composite structure.Through ABAQUS finite element simulation and launch test,the shear performance of the GFRP-concrete composite structure with perforated plate connection is explored.The main studies completed are as follows:(1)Taking the number of openings of GFEP opening plate,the presence or absence of reinforcement in the hole and the strength of concrete as the 3 main influencing factors,12 GFRP-concrete composite structures were designed.Using ABAQUS finite element software to analyze and study the stress-strain and relative slip of these 12 composite structures,and the load-slip curve shows that the number of openings has a significant effect on the shear performance of the composite structure.The distribution of stress is almost always transmitted downward from the loading position and gradually decreases.(2)Based on the ABAQUS finite element simulation,3 GFRP-concrete composite structures were selected for the number of openings for the launch test.The test results show that the load-slip curve and stress-strain distribution of the composite structure and the results obtained from the ABAQUS finite element simulation.Basically the same,but the ultimate load of the composite structure obtained from the simulation is larger than that obtained from the test,because the finite element simulation is the result under the best environment.(3)Based on the existing research results,based on the experimental data and the segmented study of the load-slip curve obtained from the test,the theoretical calculation model and shear stiffness of the load-slip curve of the composite structure were fitted.The bond shear coefficient is introduced,and the Origin expression isused to obtain the calculation expression of the shear bearing capacity of the GFRP perforated plate.