Two-dimensional elasto-plastic finite element formulation is employed to investigate theload-carrying capacity of reinforced concrete piers wrapped by steel plates which are corroded at thepier base.By comparing with experimental results,the employed finite element analysis method isverified to be accurate and effective.After that,a series of parametric studies are carried out to investigatethe effect of corrosion rate and corrosion mode of steel plates near the base of in-service pierP2 on load-carrying capacity,concrete cracking scope,yield range of wrapped steel plates.It isconcluded that the load-carrying capacity decreases with the increase of steel plates’corrosion rate.There is an obvious linear relationship between the load-carrying capacity and the corrosion rate inthe case of even corrosion mode.The deterioration of load-carrying capacity resulted from the webplates’uneven corrosion mode is more serious than that under even corrosion mode.