Residual Deformation and Cumulative Fatigue Damage Ratio of Breasting Dolphin by Single Pile Structures

Abstract

Currently, breasting dolphins of deepwater terminals are designed so as ship's berthingenergy shall be absorbed mainly by fenders. As for a singel pile structure (SPS) whichconsists of high-tensile steel, ship's berthing energy shall be absorbed mainly by piles.Major subjects to be cleared for design ofSPS are the lateral load-deflection characteristicsof piles against large deformation, estimatation of residual deformation underrepeated loads and evaluation the safety for fatigue. In this report, both residual deformationand cumulative fatigue damage ratio within a lifetime are computed with considerationof ship's berthing and mooring forces. The lateral load-deflection characteristicsof SPS against large lateral repeated loads which are obtained from the field tests andmodel experiments are taken into consideration in this study.