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    Centrifuge Shaking Table Tests on Precast Underground Structure–Superstructure System in Liquefiable Ground

    Source: Journal of Geotechnical and Geoenvironmental Engineering:;2021:;Volume ( 147 ):;issue: 008::page 04021055-1
    Author:
    Tong Zhu
    ,
    Jing Hu
    ,
    Zitao Zhang
    ,
    Jian-Min Zhang
    ,
    Rui Wang
    DOI: 10.1061/(ASCE)GT.1943-5606.0002549
    Publisher: ASCE
    Abstract: Underground structures in liquefiable ground are prone to severe earthquake damage, and the seismic responses of such underground structures can be affected by nearby superstructures. Two centrifuge shaking table tests on a precast underground structure with and without a superstructure above it in mildly inclined liquefiable ground were designed and conducted in this study. The seismic response of the underground structure was analyzed in terms of its acceleration, deformation, internal force, and waterproof performance. The influence of the superstructure on the underground structure seismic response, including the deformations and internal forces, was investigated by comparing the responses of the underground structure in the two tests. It was observed that the joints of the precast underground structure experienced greater deformations than the nonjoint positions and affected the overall seismic response of the underground structure. Among the nonjoint positions, the column and corners of the underground structure experienced relatively large deformations and internal forces. The joint-opening deformations and dynamic bending moments of the precast underground structure were mainly governed by soil shear deformation, and the increased soil lateral forces caused by excess pore pressure (EPP) accumulation increased the bending moment of the side walls. The superstructure could amplify the acceleration of the near-field soil and underground structure, thus intensifying the EPP accumulation and underground structure deformations and internal forces. The detrimental influence of superstructures on underground structures in liquefiable ground merits more attention in seismic design.
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      Centrifuge Shaking Table Tests on Precast Underground Structure–Superstructure System in Liquefiable Ground

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4271531
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    • Journal of Geotechnical and Geoenvironmental Engineering

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    contributor authorTong Zhu
    contributor authorJing Hu
    contributor authorZitao Zhang
    contributor authorJian-Min Zhang
    contributor authorRui Wang
    date accessioned2022-02-01T00:30:07Z
    date available2022-02-01T00:30:07Z
    date issued8/1/2021
    identifier other%28ASCE%29GT.1943-5606.0002549.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4271531
    description abstractUnderground structures in liquefiable ground are prone to severe earthquake damage, and the seismic responses of such underground structures can be affected by nearby superstructures. Two centrifuge shaking table tests on a precast underground structure with and without a superstructure above it in mildly inclined liquefiable ground were designed and conducted in this study. The seismic response of the underground structure was analyzed in terms of its acceleration, deformation, internal force, and waterproof performance. The influence of the superstructure on the underground structure seismic response, including the deformations and internal forces, was investigated by comparing the responses of the underground structure in the two tests. It was observed that the joints of the precast underground structure experienced greater deformations than the nonjoint positions and affected the overall seismic response of the underground structure. Among the nonjoint positions, the column and corners of the underground structure experienced relatively large deformations and internal forces. The joint-opening deformations and dynamic bending moments of the precast underground structure were mainly governed by soil shear deformation, and the increased soil lateral forces caused by excess pore pressure (EPP) accumulation increased the bending moment of the side walls. The superstructure could amplify the acceleration of the near-field soil and underground structure, thus intensifying the EPP accumulation and underground structure deformations and internal forces. The detrimental influence of superstructures on underground structures in liquefiable ground merits more attention in seismic design.
    publisherASCE
    titleCentrifuge Shaking Table Tests on Precast Underground Structure–Superstructure System in Liquefiable Ground
    typeJournal Paper
    journal volume147
    journal issue8
    journal titleJournal of Geotechnical and Geoenvironmental Engineering
    identifier doi10.1061/(ASCE)GT.1943-5606.0002549
    journal fristpage04021055-1
    journal lastpage04021055-15
    page15
    treeJournal of Geotechnical and Geoenvironmental Engineering:;2021:;Volume ( 147 ):;issue: 008
    contenttypeFulltext
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