To investigate the seismic behavior of high strength concrete square columns retrofitted with CFRP sheets

the nonlinear finite element analysis software OpenSees based on fiber model method was used to simulate the cyclic loading tests on retrofitted specimens.The influences of parameters

such as axial load ratio and shear span ratio

on the seismic behavior of specimens were studied.Then the simulation data were compared with the test results.The research results show that the simulation responses（hysteretic curves

envelop curves

lateral capacity and displacement ductility）of the numerical column model are in good agreement with the test data when the constitutive relationships of steel02 Material and concrete02 Material are used.Meanwhile

the influence rules of parameters including axial load ratio and shear span ratio on the seismic behavior of high strength columns were obtained accurately by the numerical method presented in this paper.