The experimental research and numerical simulation analysis of steel structure reinforced with CFRP

Abstract

In experimental research, we first measure the exact thickness of the solidified carbon fiber-reinforced plastic (CFRP) with the three-coordinate measuring machine, then use Shimadzu testing machine to measure elastic modulus and shear modulus of the adhesive; We do static test on H-shaped steel girder reinforced by CFRP which has different thickness, and paste strain foil on the surface of CFRP to record the change of strain and place the displacement meter in the middle of the span to observe the deformation. Making use of the performance parameters of composite materials, we use finite element method for H-shaped steel girder reinforced by CFRP to make simulation analysis, put forward truss element simulation of bonding layer, “Shell element-Truss-Entity”of CFRP reinforced H-shaped steel girder simulation of composite component model to simulate experiments, and obtain load-deflection curve, ultimate strength and deformation of reinforced composite component. The test results agree well with numerical simulation results and the comparison of the results shows that the proposed modeling approach and the experimental program is feasible, so they will provide reference for CFRP reinforcement in steel structure in the future.