Floating-type offshore structure

摘要

A floating-type offshore structure, of which the main body comprises a lower hull and plurality of struts mounted on the struts and supporting a platform above the sea level and is moored through mooring wire ropes or chains at a predetermined offshore location, and which is adapted for use under both of an ice-covered and an iceless conditions of the sea by adjusting the amount of ballast water contained in a ballast tank or tanks formed in the lower hull and/or the struts and adapted for causing ice floes to undergo downward flexural failure on account of bending stresses when they move into the sea water along the ice contacting face of the strut which is inclined inwardly toward below.