An open-type wharf with the prestressed concrete superstructure, PC wharf, consists of pretensioned hollow girders joined atop a cast-in-place beam supported by steel pipe piles. In the design of the PC wharf, the generation of a crack does not allow. Therefore, in the maintenance, the deterioration degree is judged as “a” when a crack or rust stain is identified in an inspection and diagnosis regardless of the degree of the deterioration. This means that an excessive countermeasure may apply to the PC wharf. To take the appropriate countermeasure to the PC wharf, it is necessary to evaluate its remining structural performance. In the design, the structural performance of the PC wharf is calculated as a plate structure by a frame structure analysis. Therefore, it is rational to evaluate the structural performance of the deteriorated PC wharf as the plate structure and by the frame structure analysis. However, there are not enough research and report related with the evaluation of the structural performance of the deteriorated PC wharf by a numerical simulation such as finite element method (FEM) and the frame structure analysis. There are two purposes of this study; evaluation of the structural performance of the deteriorated PC wharf by a non-linear FEM analysis and discussion of the applicability of a frame structure analysis to evaluate the structural performance of the deteriorated PC wharf.
　From the result of the FEM, the deteriorated PC wharf might have the enough structural performance when the deteriorated PC wharf was evaluated as the plate structure. It should be noted that the location of deteriorated girders influences the local structural performance of the PC wharf. In the discussion of the applicability of the frame structure analysis to evaluate the structural performance of the deteriorated PC wharf, it was found that the frame structure analysis might apply in the elastic range of the load response.

Key Words: Open-type wharf with prestressed concrete superstructure, Numerical analysis, Finite element method, Frame structure analysis