The prediction at the ice force shore structures while designing is sible and complex problem. The global ice force on offshore structures is evaluated on the Korzhavin" s formula. The axial compressive strength of ice depending on the strain rate and ice split angle are taken as stochastic values with a normal distribution law. The algorythm of the model proposed has been worked out to realize numerically the ice force on fixed structures presented as a random process. The given model was examined in smallscale indentation tests with 0.2 m ice thickness. The diameter of cylindrical indentors are 0.15; 0.22; 0.53 m. The results show that the ice failure period depends substantially on the ice sheet velocity, ice split angles and ice thickness. The coincidence of ice forces on offshore structures predicted and observed is proved to be good.
For survey, mining, storage and oil and gas transportation on continental shelf and for other aims the offshore construction becomes traditional and influences the scientific and technical progress in ocean resources exploration. Recently increasing interest to the research of ice covered seas resources is observed. The ice cover makes it necessary to develop special ice-resistant structures. The offshore structure types are various. There are platforms with technological equipment, underwater pipelines and other communications, navigational marks, coastal bases, oil and gas stores, oil-refining plants, etc. The ice-resistant platforms are the most nontraditional and vulnerable structures. There are over 100 designs of ice-resistant platforms and artificial islands developed at present time. Some of them have already been put into operation. However, their wide usage is restrained by a number of reasons, one of which is the limited data about structural response to ice actions. The ice situation in zone perspective for mastering. requires sufficiently detailed knowledge.
