THE EFFECT OF ICE ON NONLINEAR SEISMIC RESPONSES OF A OFF-SHORE STRUCTURE SURROUNDED BY THICK ICE CONSIDERING DYNAMIC INTERACTION WITH WATER

Abstract

This paper deals with the problem of nonlinear dynamic responses of a large-scale off-shore structure that is surrounded by thick ice. In modeling the system, a modified joint element is employed to simulate sliding phenomena at the interface between the soil and the structural base, frequency independent semi-infinite elements are used to model the parts of the water system away from the structure. The anisotropy of the ice and material nonlinearity of the soil are considered as well.