In this study, we investigated whether mooring facilities (caisson type and steel sheet pile type) that were damaged by natural disasters caused by earthquakes can be put into service after being deformed or slid, that is, how much "residual strength" is maintained. We investigated a method of numerically grasping it.
　For gravity type (caisson type) mooring facilities, a method to calculate the safety factor and evaluate the residual strength by stability analysis that takes into account the deformed shape of the disaster based on the method of the current technical standards and explanations for ports and harbors. was developed.
　As for the steel sheet pile quay wall, we picked up two indicators, "deformation mode" and "maximum displacement", as indicators that can be obtained quickly from the damage survey immediately after the disaster, and constructed an analysis model using a static elasto-plastic analysis method. Therefore, the applicability of the method was examined using past examples of damage to steel sheet pile quay walls.
　As a result, it was confirmed that the analytical model of the steel sheet pile quay wall can accurately reproduce the deformation, bending moment, and damage degree of the sheet piles in the past disaster cases. The evaluation method developed here could be made into a single program that can be easily executed on a personal computer in consideration of convenience in an emergency.