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    Limitations of Surface Liquefaction Manifestation Severity Index Models Used in Conjunction with Simplified Stress-Based Triggering Models

    Source: Journal of Geotechnical and Geoenvironmental Engineering:;2021:;Volume ( 148 ):;issue: 003::page 04021194
    Author:
    Sneha Upadhyaya
    ,
    Russell A. Green
    ,
    Brett W. Maurer
    ,
    Adrian Rodriguez-Marek
    ,
    Sjoerd van Ballegooy
    DOI: 10.1061/(ASCE)GT.1943-5606.0002725
    Publisher: ASCE
    Abstract: The severity of surface manifestation of liquefaction is commonly used as a proxy for liquefaction damage potential. As a result, manifestation severity index (MSI) models are more commonly being used in conjunction with simplified stress-based triggering models to predict liquefaction damage potential. This paper assesses the limitations of three existing MSI models and a fourth MSI model that is developed herein. The different models have differing attributes that account for factors influencing the severity of surficial liquefaction manifestations, with the newly proposed model accounting more factors than the others. The efficacies of these MSI models are evaluated using well-documented liquefaction case histories from Canterbury, New Zealand, with the deposits primarily comprising clean to nonplastic silty sands. It is found that the MSI models that explicitly account for the contractive/dilative tendencies of soil did not perform as well as the models that do not account for this tendency, opposite of what would be expected based on the mechanics of liquefaction manifestation. The likely reason for this is the double-counting of the dilative tendencies of medium-dense to dense soils by these MSI models because the liquefaction triggering model, to some extent, inherently accounts for such effects. This implies that development of mechanistically more rigorous MSI models that are used in conjunction with simplified triggering models will not necessarily result in improved liquefaction damage potential predictions and may result in less accurate predictions. This provides the impetus for the development of a new framework that clearly and distinctly separates triggering and manifestation.
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      Limitations of Surface Liquefaction Manifestation Severity Index Models Used in Conjunction with Simplified Stress-Based Triggering Models

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4283562
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    contributor authorSneha Upadhyaya
    contributor authorRussell A. Green
    contributor authorBrett W. Maurer
    contributor authorAdrian Rodriguez-Marek
    contributor authorSjoerd van Ballegooy
    date accessioned2022-05-07T21:18:22Z
    date available2022-05-07T21:18:22Z
    date issued2021-12-22
    identifier other(ASCE)GT.1943-5606.0002725.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4283562
    description abstractThe severity of surface manifestation of liquefaction is commonly used as a proxy for liquefaction damage potential. As a result, manifestation severity index (MSI) models are more commonly being used in conjunction with simplified stress-based triggering models to predict liquefaction damage potential. This paper assesses the limitations of three existing MSI models and a fourth MSI model that is developed herein. The different models have differing attributes that account for factors influencing the severity of surficial liquefaction manifestations, with the newly proposed model accounting more factors than the others. The efficacies of these MSI models are evaluated using well-documented liquefaction case histories from Canterbury, New Zealand, with the deposits primarily comprising clean to nonplastic silty sands. It is found that the MSI models that explicitly account for the contractive/dilative tendencies of soil did not perform as well as the models that do not account for this tendency, opposite of what would be expected based on the mechanics of liquefaction manifestation. The likely reason for this is the double-counting of the dilative tendencies of medium-dense to dense soils by these MSI models because the liquefaction triggering model, to some extent, inherently accounts for such effects. This implies that development of mechanistically more rigorous MSI models that are used in conjunction with simplified triggering models will not necessarily result in improved liquefaction damage potential predictions and may result in less accurate predictions. This provides the impetus for the development of a new framework that clearly and distinctly separates triggering and manifestation.
    publisherASCE
    titleLimitations of Surface Liquefaction Manifestation Severity Index Models Used in Conjunction with Simplified Stress-Based Triggering Models
    typeJournal Paper
    journal volume148
    journal issue3
    journal titleJournal of Geotechnical and Geoenvironmental Engineering
    identifier doi10.1061/(ASCE)GT.1943-5606.0002725
    journal fristpage04021194
    journal lastpage04021194-13
    page13
    treeJournal of Geotechnical and Geoenvironmental Engineering:;2021:;Volume ( 148 ):;issue: 003
    contenttypeFulltext
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