Effect of shear lag on stress at CFRP plate-steel beam reinforcement interface
The theoretical equations for interfacial stress calculation of carbon-fiber reinforced plastics(CFRP)reinforced beam considering shear lag were established based on the energy variational method of virtual work principle in order to analyze the effect of shear lag generated by bending deformation of I-section steel beams on interfacial normal and shear stresses of the adhesive layer.Then the correctness of the theoretical equations was verified by comparing with the experiment and finite element results.Interfacial shear and normal stresses of the adhesive layer of I-section steel beams under the action of different bending moments were conducted.Results show that assuming the longitudinal displacement of the flange plates caused by shear lag distributed in the cubic parabolic function along the lateral direction is reasonable.The shear lag effect cannot be ignored on interfacial stresses at the ends of the CFRP reinforcing I-section steel beams under bending deformation,and the impact degree magnifies with the increase of the section bending moment and flange plate width.
NETL
NSTL
万方数据
维普
