Author(s)

S. Kioka, S. Ito, H. Saeki & T. Terashima

Abstract

Vertical ice loads on offshore structures due to changes in water levels S. Kioka*, S. Ito% H. Saeki*, T. Terashima^ "Department of Civil Engineering, Hokkaido University, Kita 13 Nishi 8, Chuo-ku, Sapporo, Japan ^Pacific Consultants, Co. Ltd, Kita 4 Nishi 6, Chuo-ku, Sapporo, Japan \ Introduction In snowy cold regions, vertical ice forces act on offshore structures, including bridge piers and intake towers, with ice sheets adfrozen to them as the water level changes (Figure 1): when the water level rises, vertical forces act upward to uproot the structure; when the water level falls, vertical forces act downward to buckle the structure. Therefore, the effects of vertical forces should be considered when designing structures upon which ice forces are exerted. In this report, we explain mathematically these ice forces, and we give tables and figures for the practical computation of the ice forces with attention to destructions by adfreezing and bending. Although all the

Keywords