Cristin-resultat-ID: 1855836
Sist endret: 3. desember 2020 13:34
NVI-rapporteringsår: 2020
Resultat
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2020

Physical and mechanical properties of ice from a refrozen ship channel ice in Bay of Bothnia

Bidragsytere:
  • Vasiola Zhaka
  • Victoria Bonath
  • Bjørnar Sand og
  • Andrzej Cwirzen

Bok

PROCEEDINGS OF THE 25th INTERNATIONAL SYMPOSIUM ON ICE Trondheim, Norway, 23rd – 25th November 2020
ISBN:
  • 978-82-7598-120-0

Utgiver

IAHR International Symposium on Ice
NVI-nivå 1

Serie

Proceedings of the IAHR International Symposium on ice
ISSN 2414-6331
NVI-nivå 1

Om resultatet

Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Publiseringsår: 2020
Volum: 25
Hefte: 1
Antall sider: 10
ISBN:
  • 978-82-7598-120-0
Open Access

Klassifisering

Fagfelt (NPI)

Fagfelt: Marin og maritim teknologi
- Fagområde: Realfag og teknologi

Beskrivelse Beskrivelse

Tittel

Physical and mechanical properties of ice from a refrozen ship channel ice in Bay of Bothnia

Sammendrag

Winter navigation in the North Sea is expanding with respect to vessel size and traffic volume. Icebreakers create routes for ice-going vessels by breaking the level ice cover. Repeated vessel passages in the fairways and harbors initiate the formation of brash ice. The brash ice has the ability to refreeze quickly. In the current work, a field study was conducted on a refrozen brash ice ship channel located in Marjaniemi harbor in Bay of Bothnia. Aim of this study is to evaluate the structure and the strength of ice in the fully refrozen ship channel. Ship channel geometry, ice temperature and salinity were assessed in the field. The ice thickness was in average 45 cm covered by a snow layer with an average of 20 cm. The temperature profiles showed approximately -15ᴼC at the ice surface and close to 0ᴼC in the depths above 10 cm. Salinity varied from 0 to 1.5 ppt. Ice texture, density and compressive strength of refrozen brash ice were measured in the laboratory on 200 mm diameter cores. The behavior of refrozen brash ice with random ice texture was more ductile and stronger in uniaxial compression compared to the adjacent level ice.

Bidragsytere

Vasiola Zhaka

  • Tilknyttet:
    Forfatter
    ved Luleå tekniska universitet

Victoria Bonath

  • Tilknyttet:
    Forfatter
    ved Luleå tekniska universitet

Bjørnar Sand

  • Tilknyttet:
    Forfatter
    ved SINTEF Narvik

Andrzej Cwirzen

  • Tilknyttet:
    Forfatter
    ved Luleå tekniska universitet
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PROCEEDINGS OF THE 25th INTERNATIONAL SYMPOSIUM ON ICE Trondheim, Norway, 23rd – 25th November 2020.

Alfredsen, Knut; Høyland, Knut Vilhelm; Lu, Wenjun; Bjerke, Per Ludvig; Lia, Leif; Løset, Sveinung. 2020, IAHR International Symposium on Ice. NTNU, NVEVitenskapelig antologi/Konferanseserie
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