BASIC STUDY ON RESTORATION OF CAPACITY PERFORMANCE FOR ORRODED STEEL SHEET PILE BY REPAIRING WITH PATCH PLATE ON ONE SIDE

Abstract

 Holes and section defects were caused on the steel sheet pile wall near the low tide surface due to concentrating corrosion. There was concern about the collapse of the apron and a decrease in the sheet pile capacity. It is an urgent task to recover the mechanical performance of degraded parts. In this study, experiments and analysis were carried out in order to confirm capacity performance and the effectiveness of the joining by the method of patch plate.As a result, the stiffness and capacity of members after repair were able to obtain a great improvement effect compared with the case without repair. Moreover, through verification by numerical analysis, it was confirmed that the performance by the rib reinforcing to the patch plate was greater than when the thickness of the patch plate was increased.