Instytut Budownictwa Wodnego
Polskiej Akademii Nauk

Essay #5442 details

ATTRIBUTEVALUE
typeA
database id5442
titleLoads exerted by floating ice on a cylindrical structure
authorsStaroszczyk R.1
affiliations
pages39 — 58
full text linkhttp://www.ibwpan.gda.pl/storage/app/media/ahem/ahem52str039.pdf
keywordsfloating ice, plate, rheology, creep buckling, finite difference method
abstractsThe paper is concerned with the problem of interaction between a coherent floating ice cover and a fixed, rigid, vertically-walled circular cylinder. The ice cover, of horizontal dimensions considerably larger than the size of the structure, is assumed to be driven against the structure by wind and water current drag stresses. The floating ice cover is modelled as a plate that is subject to the action of horizontal forces and transverse bending due to the reaction of underlying water. During an interaction event, of a quasi-static character, the ice is modelled as a creeping material the behaviour of which is described by a viscous flow law with two, bulk and shear, viscosities. The viscosities change dramatically in their magnitudes during a transition from converging to diverging deformation of the material to reflect the fact that floating ice offers much less resistance to tensile rather than compressive stresses. By numerical simulations carried out by a finite difference method, the influence of the ice rheological parameters on the distribution of contact stresses at the ice – structure interface is investigated. Two types of boundary conditions at the interface, free-slip and no-slip, are considered, and their effects on the loads sustained by the structure are compared. In addition, creep buckling of the ice sheet near the structure is analysed to determine the critical time at which ice starts to fail due to exceeding its flexural strength at given loading conditions.
attributes [reviewed] [scientific]
languageen
points6
PART OF
typeC
database id3801
year2005
seriesArchives of Hydro-Engineering and Environmental Mechanics
issueVol. 52, No. 1
publisherWydawnictwo IBW PAN
placeGdańsk

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