Slab foundation subjected to thrust faulting in dry sand

Parametric analysis and simplified design method

I. Anastasopoulos, G. Antonakos, G. Gazetas

    Research output: Contribution to journalArticle

    13 Citations (Scopus)

    Abstract

    Motivated by recent case histories of faulting-induced damage to structures (Chi-Chi, 1999; Wenchuan 2008), this paper applies a thoroughly validated finite element analysis methodology to study the response of slab foundations subjected to thrust faulting. A parametric study is conducted, investigating the effect of key response parameters. It is shown that the stressing of the foundation, and consequently of the superstructure, stems mainly from loss of support. Depending on the geometry, loss of support takes place either under the edges or under the middle of the foundation, generating hogging or sagging deformation, respectively. Increasing the weight of the structure and/or decreasing soil stiffness leads to less stressing of the foundation. Surprisingly, even when the fault rupture emerges beyond the structure, completely avoiding the foundation, substantial foundation distress may still be generated. Exploiting the results of the parametric study, a simplified design method is developed, calling for conventional static analysis of a slab on Winkler supports, "simulating" the fault rupture by removing Winkler springs from equivalent area(s) of loss of support. The latter can be estimated with the help of design charts, further facilitating its use in practice. The proposed simplified method should not be viewed as a general design tool, but as a first idea of a practical solution to the investigated problem.
    Original languageEnglish
    Pages (from-to)912-924
    Number of pages13
    JournalSoil Dynamics and Earthquake Engineering
    Volume30
    Issue number10
    DOIs
    Publication statusPublished - Oct 2010

    Fingerprint

    Faulting
    slabs
    design method
    slab
    faulting
    Sand
    thrust
    sand
    rupture
    finite element analysis
    distress
    stiffness
    experimental design
    methodology
    case studies
    geometry
    damage
    stems
    Static analysis
    history

    Cite this

    @article{6e98fa3fe9874f2a9b70df3be3866bb4,
    title = "Slab foundation subjected to thrust faulting in dry sand: Parametric analysis and simplified design method",
    abstract = "Motivated by recent case histories of faulting-induced damage to structures (Chi-Chi, 1999; Wenchuan 2008), this paper applies a thoroughly validated finite element analysis methodology to study the response of slab foundations subjected to thrust faulting. A parametric study is conducted, investigating the effect of key response parameters. It is shown that the stressing of the foundation, and consequently of the superstructure, stems mainly from loss of support. Depending on the geometry, loss of support takes place either under the edges or under the middle of the foundation, generating hogging or sagging deformation, respectively. Increasing the weight of the structure and/or decreasing soil stiffness leads to less stressing of the foundation. Surprisingly, even when the fault rupture emerges beyond the structure, completely avoiding the foundation, substantial foundation distress may still be generated. Exploiting the results of the parametric study, a simplified design method is developed, calling for conventional static analysis of a slab on Winkler supports, {"}simulating{"} the fault rupture by removing Winkler springs from equivalent area(s) of loss of support. The latter can be estimated with the help of design charts, further facilitating its use in practice. The proposed simplified method should not be viewed as a general design tool, but as a first idea of a practical solution to the investigated problem.",
    author = "I. Anastasopoulos and G. Antonakos and G. Gazetas",
    note = "Copyright 2010 Elsevier B.V., All rights reserved.",
    year = "2010",
    month = "10",
    doi = "10.1016/j.soildyn.2010.04.002",
    language = "English",
    volume = "30",
    pages = "912--924",
    journal = "Soil Dynamics and Earthquake Engineering",
    issn = "0267-7261",
    publisher = "Elsevier",
    number = "10",

    }

    Slab foundation subjected to thrust faulting in dry sand : Parametric analysis and simplified design method. / Anastasopoulos, I.; Antonakos, G.; Gazetas, G.

    In: Soil Dynamics and Earthquake Engineering, Vol. 30, No. 10, 10.2010, p. 912-924.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Slab foundation subjected to thrust faulting in dry sand

    T2 - Parametric analysis and simplified design method

    AU - Anastasopoulos, I.

    AU - Antonakos, G.

    AU - Gazetas, G.

    N1 - Copyright 2010 Elsevier B.V., All rights reserved.

    PY - 2010/10

    Y1 - 2010/10

    N2 - Motivated by recent case histories of faulting-induced damage to structures (Chi-Chi, 1999; Wenchuan 2008), this paper applies a thoroughly validated finite element analysis methodology to study the response of slab foundations subjected to thrust faulting. A parametric study is conducted, investigating the effect of key response parameters. It is shown that the stressing of the foundation, and consequently of the superstructure, stems mainly from loss of support. Depending on the geometry, loss of support takes place either under the edges or under the middle of the foundation, generating hogging or sagging deformation, respectively. Increasing the weight of the structure and/or decreasing soil stiffness leads to less stressing of the foundation. Surprisingly, even when the fault rupture emerges beyond the structure, completely avoiding the foundation, substantial foundation distress may still be generated. Exploiting the results of the parametric study, a simplified design method is developed, calling for conventional static analysis of a slab on Winkler supports, "simulating" the fault rupture by removing Winkler springs from equivalent area(s) of loss of support. The latter can be estimated with the help of design charts, further facilitating its use in practice. The proposed simplified method should not be viewed as a general design tool, but as a first idea of a practical solution to the investigated problem.

    AB - Motivated by recent case histories of faulting-induced damage to structures (Chi-Chi, 1999; Wenchuan 2008), this paper applies a thoroughly validated finite element analysis methodology to study the response of slab foundations subjected to thrust faulting. A parametric study is conducted, investigating the effect of key response parameters. It is shown that the stressing of the foundation, and consequently of the superstructure, stems mainly from loss of support. Depending on the geometry, loss of support takes place either under the edges or under the middle of the foundation, generating hogging or sagging deformation, respectively. Increasing the weight of the structure and/or decreasing soil stiffness leads to less stressing of the foundation. Surprisingly, even when the fault rupture emerges beyond the structure, completely avoiding the foundation, substantial foundation distress may still be generated. Exploiting the results of the parametric study, a simplified design method is developed, calling for conventional static analysis of a slab on Winkler supports, "simulating" the fault rupture by removing Winkler springs from equivalent area(s) of loss of support. The latter can be estimated with the help of design charts, further facilitating its use in practice. The proposed simplified method should not be viewed as a general design tool, but as a first idea of a practical solution to the investigated problem.

    UR - http://www.scopus.com/inward/record.url?scp=77954758863&partnerID=8YFLogxK

    U2 - 10.1016/j.soildyn.2010.04.002

    DO - 10.1016/j.soildyn.2010.04.002

    M3 - Article

    VL - 30

    SP - 912

    EP - 924

    JO - Soil Dynamics and Earthquake Engineering

    JF - Soil Dynamics and Earthquake Engineering

    SN - 0267-7261

    IS - 10

    ER -