The compressive behavior of 15 cylindrical wood columns that were externally wrapped by CFRP or GFRP sheets were experimental investigated.The results show that FRP can effectively improve the compressive bearing capacity and ductility of the wood column by confining it laterally.The axial ultimate compressive strength increase by about 15%.Based on the Tsai-Wu criterion,the plastic yielding formulation and the corresponding yielding surface equation of triaxially compressed wood columns were developed.From the equilibrium of the forces and the strain compatibility,an incremental constitutive model was developed to simulate the stress-strain behavior of uniaxially compressed wood column confined by FRP.The mechanism of the specimens shows that tensile failure of fibers does not occur at the ultimate compressive strength of the confined wood columns,and the tensile strain is far less than the ultimate tensile strain of FRP.A formula to predict the stress-strain at the ultimate compressive strength of FRP confined wood column is achieved from the experimental data,and which is used as the closing condition of the calculate model procedure.The stress-strain curve of FRP confined wood column past the ultimate compressive strength is approaching the horizontal line,and it is assumed to be idealized plasticity.The predictions of the model are agreeable well to the test data.