A numerical study of thermal ice loads on structures
A numerical model is presented for the prediction of the three-dimensional stress field in an ice sheet due to temperature changes, as a function of time, under a variety of conditions. The model relies on two separate computer programs for the thermal and mechanical aspects of the problem. The ther...
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1998
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crcansciencepubl:10.1139/l97-119 2023-12-17T10:31:47+01:00 A numerical study of thermal ice loads on structures Azarnejad, A Hrudey, T M 1998 http://dx.doi.org/10.1139/l97-119 http://www.nrcresearchpress.com/doi/pdf/10.1139/l97-119 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Civil Engineering volume 25, issue 3, page 557-568 ISSN 0315-1468 1208-6029 General Environmental Science Civil and Structural Engineering journal-article 1998 crcansciencepubl https://doi.org/10.1139/l97-119 2023-11-19T13:38:31Z A numerical model is presented for the prediction of the three-dimensional stress field in an ice sheet due to temperature changes, as a function of time, under a variety of conditions. The model relies on two separate computer programs for the thermal and mechanical aspects of the problem. The thermal program uses the finite difference method to calculate the temperature distribution through the thickness of the ice cover under a variety of meteorological input conditions. The mechanical part of the analysis is conducted using the finite element method. A degenerate shell element is used, which is capable of modeling both bending and membrane behaviors of the ice cover. Relevant features of the finite element model include variable temperature and properties through the thickness, an elastic foundation representation of the underlying water, nonlinear constitutive behavior of the ice, temperature-dependent mechanical properties, flexibility of resisting structures, and boundary conditions representing a variety of shoreline types. Results are presented from simulations conducted during verification of the model. Included are simulations of uniaxial and biaxial laboratory tests on the thermal expansion of ice as well as three thermal events for which field data were available. Conclusions are presented concerning the analytical prediction of thermal ice forces.Key words: ice loads, thermal loads, ice mechanics, hydraulic structures, dams. Article in Journal/Newspaper Ice Sheet Canadian Science Publishing (via Crossref) Canadian Journal of Civil Engineering 25 3 557 568 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Environmental Science Civil and Structural Engineering |
spellingShingle |
General Environmental Science Civil and Structural Engineering Azarnejad, A Hrudey, T M A numerical study of thermal ice loads on structures |
topic_facet |
General Environmental Science Civil and Structural Engineering |
description |
A numerical model is presented for the prediction of the three-dimensional stress field in an ice sheet due to temperature changes, as a function of time, under a variety of conditions. The model relies on two separate computer programs for the thermal and mechanical aspects of the problem. The thermal program uses the finite difference method to calculate the temperature distribution through the thickness of the ice cover under a variety of meteorological input conditions. The mechanical part of the analysis is conducted using the finite element method. A degenerate shell element is used, which is capable of modeling both bending and membrane behaviors of the ice cover. Relevant features of the finite element model include variable temperature and properties through the thickness, an elastic foundation representation of the underlying water, nonlinear constitutive behavior of the ice, temperature-dependent mechanical properties, flexibility of resisting structures, and boundary conditions representing a variety of shoreline types. Results are presented from simulations conducted during verification of the model. Included are simulations of uniaxial and biaxial laboratory tests on the thermal expansion of ice as well as three thermal events for which field data were available. Conclusions are presented concerning the analytical prediction of thermal ice forces.Key words: ice loads, thermal loads, ice mechanics, hydraulic structures, dams. |
format |
Article in Journal/Newspaper |
author |
Azarnejad, A Hrudey, T M |
author_facet |
Azarnejad, A Hrudey, T M |
author_sort |
Azarnejad, A |
title |
A numerical study of thermal ice loads on structures |
title_short |
A numerical study of thermal ice loads on structures |
title_full |
A numerical study of thermal ice loads on structures |
title_fullStr |
A numerical study of thermal ice loads on structures |
title_full_unstemmed |
A numerical study of thermal ice loads on structures |
title_sort |
numerical study of thermal ice loads on structures |
publisher |
Canadian Science Publishing |
publishDate |
1998 |
url |
http://dx.doi.org/10.1139/l97-119 http://www.nrcresearchpress.com/doi/pdf/10.1139/l97-119 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Canadian Journal of Civil Engineering volume 25, issue 3, page 557-568 ISSN 0315-1468 1208-6029 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/l97-119 |
container_title |
Canadian Journal of Civil Engineering |
container_volume |
25 |
container_issue |
3 |
container_start_page |
557 |
op_container_end_page |
568 |
_version_ |
1785585191538917376 |