Finite Element Analysis of Damaged Steel Beams Reinforced with Carbon Fibre Reinforced Plastics Considering Bonding Layer Failure
A simply supported beam model is established by using ABAQUS finite element software,and a study of the reinforcement of damaged steel components with CFRP is conducted.Seven specimens are designed,and the be-havior of the bonding layer and CFRP is simulated through element selection,mesh division and material property analysis.The stress states,load deformation relationship curve,and specimen bearing capacity of beams,boding lay-ers,and CFRP under yield and ultimate loads are analyzed.The results show that pasting CFRP has limited effect on steel beams in the elastic stage,but can increase stiffness and improve the ultimate bending capacity in the plas-tic stage.The incsion on the lower flange can affect the stress stage and bearing capacity of the steel beam,and pas-ting CFRP can improve the stress state.The best effect is achieved when the bonding area of CFRP is between 50%and 75%.The bonding layer of CFRP pasted steel beams does not fail before the ultimate load,but the bonding layer at the mid span position will fail after the load increases.
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维普
