Cyclic direct shear behaviors of an artificial frozen soil-structure interface under constant normal stress and sub-zero temperature
The soil-structure interface between structures and frozen soil ground is an important element to the structure safety in permafrost regions. This interface is usually subjected to a constant normal stress and cyclic shear loadings such as seismic, wind, and wave loadings. Hence, the cyclic direct s...
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Edith Cowan University, Research Online, Perth, Western Australia
2017
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ftedithcowan:oai:ro.ecu.edu.au:ecuworkspost2013-3721 2023-05-15T17:58:14+02:00 Cyclic direct shear behaviors of an artificial frozen soil-structure interface under constant normal stress and sub-zero temperature Zhao, Lianzhen Yang, Ping Zhang, Laichang Wang, J. G. 2017-01-01T08:00:00Z https://ro.ecu.edu.au/ecuworkspost2013/2715 https://doi.org/10.1016/j.coldregions.2016.10.011 unknown Edith Cowan University, Research Online, Perth, Western Australia https://ro.ecu.edu.au/ecuworkspost2013/2715 https://doi.org/10.1016/j.coldregions.2016.10.011 subscription content Research outputs 2014 to 2021 Frozen soil-structure interface Constant normal stress Cyclic shearing Sub-zero temperature Normal displacement Damage model Engineering text 2017 ftedithcowan https://doi.org/10.1016/j.coldregions.2016.10.011 2022-03-19T23:47:34Z The soil-structure interface between structures and frozen soil ground is an important element to the structure safety in permafrost regions. This interface is usually subjected to a constant normal stress and cyclic shear loadings such as seismic, wind, and wave loadings. Hence, the cyclic direct shear behaviors of this interface have critical impacts on the safety and durability of the structure. This paper investigated the cyclic direct shear behaviors of an artificial frozen soil-structure interface under four constant normal stresses and four sub-zero temperatures by using a large-scale multi-functional direct shear apparatus. Cyclic shear stress and normal displacement were measured under normal stresses of 100, 300, 500, and 700 kPa and at sub-zero temperatures of − 2, − 6, − 10, and − 14 °C, respectively. These measurements revealed the following mechanical properties of this artificial interface: (1) The maximum shear stress is always observed in the initial stage of the first cycle. This maximum shear stress is linearly related to the normal stress. (2) Both the internal friction angle and the cohesion of this interface at the maximum shear stress decrease with the increase of sub-zero temperature. (3) The internal friction angle decreases with further cycles. This angle becomes significantly smaller in the stabilized cycles than that in the first cycle. (4) The maximum dilation measured by normal displacement is always observed in the first cycle. This dilation is decreasing with higher normal stress and at lower sub-zero temperature. However, the final normal displacement always contracts and its magnitude increases with the increase of normal stress or the decrease of sub-zero temperature. Finally, a simple damage model is proposed to describe these behaviors of this artificial interface and its performance is checked through its prediction for experimental data. Text permafrost Edith Cowan University (ECU, Australia): Research Online Cold Regions Science and Technology 133 70 81 |
institution |
Open Polar |
collection |
Edith Cowan University (ECU, Australia): Research Online |
op_collection_id |
ftedithcowan |
language |
unknown |
topic |
Frozen soil-structure interface Constant normal stress Cyclic shearing Sub-zero temperature Normal displacement Damage model Engineering |
spellingShingle |
Frozen soil-structure interface Constant normal stress Cyclic shearing Sub-zero temperature Normal displacement Damage model Engineering Zhao, Lianzhen Yang, Ping Zhang, Laichang Wang, J. G. Cyclic direct shear behaviors of an artificial frozen soil-structure interface under constant normal stress and sub-zero temperature |
topic_facet |
Frozen soil-structure interface Constant normal stress Cyclic shearing Sub-zero temperature Normal displacement Damage model Engineering |
description |
The soil-structure interface between structures and frozen soil ground is an important element to the structure safety in permafrost regions. This interface is usually subjected to a constant normal stress and cyclic shear loadings such as seismic, wind, and wave loadings. Hence, the cyclic direct shear behaviors of this interface have critical impacts on the safety and durability of the structure. This paper investigated the cyclic direct shear behaviors of an artificial frozen soil-structure interface under four constant normal stresses and four sub-zero temperatures by using a large-scale multi-functional direct shear apparatus. Cyclic shear stress and normal displacement were measured under normal stresses of 100, 300, 500, and 700 kPa and at sub-zero temperatures of − 2, − 6, − 10, and − 14 °C, respectively. These measurements revealed the following mechanical properties of this artificial interface: (1) The maximum shear stress is always observed in the initial stage of the first cycle. This maximum shear stress is linearly related to the normal stress. (2) Both the internal friction angle and the cohesion of this interface at the maximum shear stress decrease with the increase of sub-zero temperature. (3) The internal friction angle decreases with further cycles. This angle becomes significantly smaller in the stabilized cycles than that in the first cycle. (4) The maximum dilation measured by normal displacement is always observed in the first cycle. This dilation is decreasing with higher normal stress and at lower sub-zero temperature. However, the final normal displacement always contracts and its magnitude increases with the increase of normal stress or the decrease of sub-zero temperature. Finally, a simple damage model is proposed to describe these behaviors of this artificial interface and its performance is checked through its prediction for experimental data. |
format |
Text |
author |
Zhao, Lianzhen Yang, Ping Zhang, Laichang Wang, J. G. |
author_facet |
Zhao, Lianzhen Yang, Ping Zhang, Laichang Wang, J. G. |
author_sort |
Zhao, Lianzhen |
title |
Cyclic direct shear behaviors of an artificial frozen soil-structure interface under constant normal stress and sub-zero temperature |
title_short |
Cyclic direct shear behaviors of an artificial frozen soil-structure interface under constant normal stress and sub-zero temperature |
title_full |
Cyclic direct shear behaviors of an artificial frozen soil-structure interface under constant normal stress and sub-zero temperature |
title_fullStr |
Cyclic direct shear behaviors of an artificial frozen soil-structure interface under constant normal stress and sub-zero temperature |
title_full_unstemmed |
Cyclic direct shear behaviors of an artificial frozen soil-structure interface under constant normal stress and sub-zero temperature |
title_sort |
cyclic direct shear behaviors of an artificial frozen soil-structure interface under constant normal stress and sub-zero temperature |
publisher |
Edith Cowan University, Research Online, Perth, Western Australia |
publishDate |
2017 |
url |
https://ro.ecu.edu.au/ecuworkspost2013/2715 https://doi.org/10.1016/j.coldregions.2016.10.011 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Research outputs 2014 to 2021 |
op_relation |
https://ro.ecu.edu.au/ecuworkspost2013/2715 https://doi.org/10.1016/j.coldregions.2016.10.011 |
op_rights |
subscription content |
op_doi |
https://doi.org/10.1016/j.coldregions.2016.10.011 |
container_title |
Cold Regions Science and Technology |
container_volume |
133 |
container_start_page |
70 |
op_container_end_page |
81 |
_version_ |
1766166799014952960 |