Combined translational and rotational sliding of gravity based structures loaded by ice

摘要

Structures in ice-infested waters are subject to horizontal and vertical ice actions. These actions will be transferred to the base of the structure and the subsoil. For gravity based structures (GBS) various verifications need to be performed in a stability analysis. These verifications are similar to the stability of a shallow foundation, such as sliding, overturning and bearing capacity. The methods presented in most handbooks are basically 2D and consider actions in the x-z (vertical) plane. This paper however focuses on actions in the x-y (horizontal) plane. The effect of eccentric loading in the x-y-plane, causing both rotational and translational effects, is investigated. The method is applied to circular structure and rectangular structures. Furthermore these structures are modelled in a 3D FEM model to verify the results.