Residual Strain in a Reservoir Ice Cover : Field Investigations, Causes, and Its Role in Estimating Ice Stress
Ice strain dominates the ice thrust and dynamics on reservoir dams and retaining structures. An exclusively designed laser range finder was deployed to measure the surface ice displacements along six directions at a reservoir in northeastern China. The incompletely confined boundary (ice-boundary bo...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/246371 2024-01-07T09:46:10+01:00 Residual Strain in a Reservoir Ice Cover : Field Investigations, Causes, and Its Role in Estimating Ice Stress Huang, Wenfeng Li, Zhijun Leppäranta, Matti Han, Hongwei Wang, Ni Department of Physics 2018-10-02T10:53:01Z 12 application/pdf http://hdl.handle.net/10138/246371 eng eng ASCE-AMER SOC CIVIL ENGINEERS 10.1061/(ASCE)HY.1943-7900.0001488 This research was supported by the National Natural Science Foundation of China (Nos. 41402203 and 51579028) and the Special Fund for Basic Scientific Research of Central Colleges (310829171002). We are also grateful to Dr. Yu Yang from Shenyang Institute of Engineering, Mr. Yanfeng Cheng from Polar Research Institute of China, and the staff from the Executive Department of Hongqipao Reservoir for their field assistance and theoretical discussion. Huang , W , Li , Z , Leppäranta , M , Han , H & Wang , N 2018 , ' Residual Strain in a Reservoir Ice Cover : Field Investigations, Causes, and Its Role in Estimating Ice Stress ' , Journal of Hydraulic Engineering (New York) , vol. 144 , no. 8 , 04018048 . https://doi.org/10.1061/(ASCE)HY.1943-7900.0001488 85047876435 9d459b08-5b48-4b5c-add1-f85a6f3e692f http://hdl.handle.net/10138/246371 000443504700008 unspecified openAccess info:eu-repo/semantics/openAccess Thermal strain Residual strain Constitutive law Static ice loads Reservoir ice PRESSURES CANADA LOADS DAM 114 Physical sciences Article acceptedVersion 2018 ftunivhelsihelda 2023-12-14T00:13:28Z Ice strain dominates the ice thrust and dynamics on reservoir dams and retaining structures. An exclusively designed laser range finder was deployed to measure the surface ice displacements along six directions at a reservoir in northeastern China. The incompletely confined boundary (ice-boundary bonding), ice cracks development, water level fluctuations, parallel crack dynamics, and ice creep allow the surface ice to move rather than keep still in response to thermal deformation/pressure, and thus cause the ice strain to deviate from thermal strain. Consequently, a residual strain was introduced and calculated from the recorded displacements. Observations showed that the residual strains were anisotropic and showed diurnal patterns following the air/ice temperature. A scale-dependence of crack development was observed to cause potential scale-effects to residual strains. The real ice strain consists of thermal strain and residual strain. The proportion of the latter increased as time went by. A modified constitutive law accommodating the residual strains was developed to evaluate the impacts of the residual strains and to estimate the surface ice stresses. Modeling results underlined the role of the residual strain in determining both the principal stress and the stress perpendicular to and parallel with the dam face. The residual strain is probably the reason why the observed ice stress is always much lower than the single thermal stress. (C) 2018 American Society of Civil Engineers. Peer reviewed Article in Journal/Newspaper Polar Research HELDA – University of Helsinki Open Repository Canada |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
Thermal strain Residual strain Constitutive law Static ice loads Reservoir ice PRESSURES CANADA LOADS DAM 114 Physical sciences |
spellingShingle |
Thermal strain Residual strain Constitutive law Static ice loads Reservoir ice PRESSURES CANADA LOADS DAM 114 Physical sciences Huang, Wenfeng Li, Zhijun Leppäranta, Matti Han, Hongwei Wang, Ni Residual Strain in a Reservoir Ice Cover : Field Investigations, Causes, and Its Role in Estimating Ice Stress |
topic_facet |
Thermal strain Residual strain Constitutive law Static ice loads Reservoir ice PRESSURES CANADA LOADS DAM 114 Physical sciences |
description |
Ice strain dominates the ice thrust and dynamics on reservoir dams and retaining structures. An exclusively designed laser range finder was deployed to measure the surface ice displacements along six directions at a reservoir in northeastern China. The incompletely confined boundary (ice-boundary bonding), ice cracks development, water level fluctuations, parallel crack dynamics, and ice creep allow the surface ice to move rather than keep still in response to thermal deformation/pressure, and thus cause the ice strain to deviate from thermal strain. Consequently, a residual strain was introduced and calculated from the recorded displacements. Observations showed that the residual strains were anisotropic and showed diurnal patterns following the air/ice temperature. A scale-dependence of crack development was observed to cause potential scale-effects to residual strains. The real ice strain consists of thermal strain and residual strain. The proportion of the latter increased as time went by. A modified constitutive law accommodating the residual strains was developed to evaluate the impacts of the residual strains and to estimate the surface ice stresses. Modeling results underlined the role of the residual strain in determining both the principal stress and the stress perpendicular to and parallel with the dam face. The residual strain is probably the reason why the observed ice stress is always much lower than the single thermal stress. (C) 2018 American Society of Civil Engineers. Peer reviewed |
author2 |
Department of Physics |
format |
Article in Journal/Newspaper |
author |
Huang, Wenfeng Li, Zhijun Leppäranta, Matti Han, Hongwei Wang, Ni |
author_facet |
Huang, Wenfeng Li, Zhijun Leppäranta, Matti Han, Hongwei Wang, Ni |
author_sort |
Huang, Wenfeng |
title |
Residual Strain in a Reservoir Ice Cover : Field Investigations, Causes, and Its Role in Estimating Ice Stress |
title_short |
Residual Strain in a Reservoir Ice Cover : Field Investigations, Causes, and Its Role in Estimating Ice Stress |
title_full |
Residual Strain in a Reservoir Ice Cover : Field Investigations, Causes, and Its Role in Estimating Ice Stress |
title_fullStr |
Residual Strain in a Reservoir Ice Cover : Field Investigations, Causes, and Its Role in Estimating Ice Stress |
title_full_unstemmed |
Residual Strain in a Reservoir Ice Cover : Field Investigations, Causes, and Its Role in Estimating Ice Stress |
title_sort |
residual strain in a reservoir ice cover : field investigations, causes, and its role in estimating ice stress |
publisher |
ASCE-AMER SOC CIVIL ENGINEERS |
publishDate |
2018 |
url |
http://hdl.handle.net/10138/246371 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Polar Research |
genre_facet |
Polar Research |
op_relation |
10.1061/(ASCE)HY.1943-7900.0001488 This research was supported by the National Natural Science Foundation of China (Nos. 41402203 and 51579028) and the Special Fund for Basic Scientific Research of Central Colleges (310829171002). We are also grateful to Dr. Yu Yang from Shenyang Institute of Engineering, Mr. Yanfeng Cheng from Polar Research Institute of China, and the staff from the Executive Department of Hongqipao Reservoir for their field assistance and theoretical discussion. Huang , W , Li , Z , Leppäranta , M , Han , H & Wang , N 2018 , ' Residual Strain in a Reservoir Ice Cover : Field Investigations, Causes, and Its Role in Estimating Ice Stress ' , Journal of Hydraulic Engineering (New York) , vol. 144 , no. 8 , 04018048 . https://doi.org/10.1061/(ASCE)HY.1943-7900.0001488 85047876435 9d459b08-5b48-4b5c-add1-f85a6f3e692f http://hdl.handle.net/10138/246371 000443504700008 |
op_rights |
unspecified openAccess info:eu-repo/semantics/openAccess |
_version_ |
1787427874650718208 |