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    Radial Thermal Gradient–Dependent Deformation Behaviors of Frozen Hollow Cylinder

    Source: Journal of Cold Regions Engineering:;2019:;Volume ( 033 ):;issue: 001
    Author:
    Xiaodong Zhao; Guoqing Zhou; Zhiyuan Lv
    DOI: 10.1061/(ASCE)CR.1943-5495.0000180
    Publisher: American Society of Civil Engineers
    Abstract: The in-situ lateral temperature around freezing pipes in an artificially frozen shaft lining (FSL) is always nonuniform. In order to obtain a better understanding of the radial thermal gradient–dependent deformation behaviors of frozen soils, a test apparatus for a frozen hollow cylinder (FHC) under a radial thermal gradient and the matching specimen preparation device were developed. The results obtained showed that the temperature precision was within ±0.05°C and the measured thermal gradient fluctuation was within ±0.03°C/cm by circulating refrigerants rapidly through the confined cells. The initiation and growth of the thermal gradient significantly lowered the elastic modulus and the peak strength but had little effect on the strain-softening behavior. The inclination angle of the observed shear band exhibited a slight increase as the thermal gradient increased. Further, a linear response was detected between the heterogeneity level and the peak strength, and it was independent of soil types and temperatures. These observations were fundamentally distinguished from previous studies on frozen soil specimens under a vertical thermal gradient and contributed to developing a practical technique to decrease the temperatures at the inner surface and thermal gradient near the inner surface of the FSL.
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      Radial Thermal Gradient–Dependent Deformation Behaviors of Frozen Hollow Cylinder

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4254756
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    contributor authorXiaodong Zhao; Guoqing Zhou; Zhiyuan Lv
    date accessioned2019-03-10T12:03:15Z
    date available2019-03-10T12:03:15Z
    date issued2019
    identifier other%28ASCE%29CR.1943-5495.0000180.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4254756
    description abstractThe in-situ lateral temperature around freezing pipes in an artificially frozen shaft lining (FSL) is always nonuniform. In order to obtain a better understanding of the radial thermal gradient–dependent deformation behaviors of frozen soils, a test apparatus for a frozen hollow cylinder (FHC) under a radial thermal gradient and the matching specimen preparation device were developed. The results obtained showed that the temperature precision was within ±0.05°C and the measured thermal gradient fluctuation was within ±0.03°C/cm by circulating refrigerants rapidly through the confined cells. The initiation and growth of the thermal gradient significantly lowered the elastic modulus and the peak strength but had little effect on the strain-softening behavior. The inclination angle of the observed shear band exhibited a slight increase as the thermal gradient increased. Further, a linear response was detected between the heterogeneity level and the peak strength, and it was independent of soil types and temperatures. These observations were fundamentally distinguished from previous studies on frozen soil specimens under a vertical thermal gradient and contributed to developing a practical technique to decrease the temperatures at the inner surface and thermal gradient near the inner surface of the FSL.
    publisherAmerican Society of Civil Engineers
    titleRadial Thermal Gradient–Dependent Deformation Behaviors of Frozen Hollow Cylinder
    typeJournal Paper
    journal volume33
    journal issue1
    journal titleJournal of Cold Regions Engineering
    identifier doi10.1061/(ASCE)CR.1943-5495.0000180
    page04018015
    treeJournal of Cold Regions Engineering:;2019:;Volume ( 033 ):;issue: 001
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian