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    Soil–Geogrid Interaction at Various Influencing Factors by Pullout Tests with Applications of FBG Sensors

    Source: Journal of Materials in Civil Engineering:;2019:;Volume ( 031 ):;issue: 001
    Author:
    Han-Lin Wang; Ren-Peng Chen; Qi-Wei Liu; Xin Kang; Yan-Wei Wang
    DOI: 10.1061/(ASCE)MT.1943-5533.0002537
    Publisher: American Society of Civil Engineers
    Abstract: The behavior of soil–geogrid interaction is a dominant factor in the long-term performance of geogrid-reinforced earth structures. This study investigates the interaction of sandy soil and the embedded geogrid by pullout tests with the application of a novel testing method using fiber Bragg grating (FBG) sensors. Three influencing parameters are considered: dry density of soil, initial normal stress, and fixing condition of the pullout back end. A displacement-controlled mode is used for the normal stress, and the pullout load is applied at a constant loading rate. The results indicate that for the case with a free back end, the peak shear stress mobilizes from the front face toward the back end with the elongation of the geogrid during the pullout process, before the entire slippage of the geogrid. With higher dry density or higher initial normal stress, the mobilization of the peak shear stress transmits more slowly and the distribution area of shear stress along the geogrid is accordingly narrower due to the corresponding higher resistance by the soil particles. However, the values of the peak shear stress in these two cases are still higher than in cases with lower dry density or lower initial normal stress. By contrast, a different distribution mode of shear stress along the soil–geogrid interface is identified for geogrid with a fixed back end, with maximum shear stress developing near the front face for all pullout displacements.
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      Soil–Geogrid Interaction at Various Influencing Factors by Pullout Tests with Applications of FBG Sensors

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4255270
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    contributor authorHan-Lin Wang; Ren-Peng Chen; Qi-Wei Liu; Xin Kang; Yan-Wei Wang
    date accessioned2019-03-10T12:17:34Z
    date available2019-03-10T12:17:34Z
    date issued2019
    identifier other%28ASCE%29MT.1943-5533.0002537.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4255270
    description abstractThe behavior of soil–geogrid interaction is a dominant factor in the long-term performance of geogrid-reinforced earth structures. This study investigates the interaction of sandy soil and the embedded geogrid by pullout tests with the application of a novel testing method using fiber Bragg grating (FBG) sensors. Three influencing parameters are considered: dry density of soil, initial normal stress, and fixing condition of the pullout back end. A displacement-controlled mode is used for the normal stress, and the pullout load is applied at a constant loading rate. The results indicate that for the case with a free back end, the peak shear stress mobilizes from the front face toward the back end with the elongation of the geogrid during the pullout process, before the entire slippage of the geogrid. With higher dry density or higher initial normal stress, the mobilization of the peak shear stress transmits more slowly and the distribution area of shear stress along the geogrid is accordingly narrower due to the corresponding higher resistance by the soil particles. However, the values of the peak shear stress in these two cases are still higher than in cases with lower dry density or lower initial normal stress. By contrast, a different distribution mode of shear stress along the soil–geogrid interface is identified for geogrid with a fixed back end, with maximum shear stress developing near the front face for all pullout displacements.
    publisherAmerican Society of Civil Engineers
    titleSoil–Geogrid Interaction at Various Influencing Factors by Pullout Tests with Applications of FBG Sensors
    typeJournal Paper
    journal volume31
    journal issue1
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)MT.1943-5533.0002537
    page04018342
    treeJournal of Materials in Civil Engineering:;2019:;Volume ( 031 ):;issue: 001
    contenttypeFulltext
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