Lateral spreading within a limit equilibrium framework: Newmark sliding blocks with degrading yield accelerations
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Lateral spreading within a limit equilibrium framework: Newmark sliding blocks with degrading yield accelerations

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  • Journal Title:
    Géotechnique
  • Personal Author:
  • NOAA Program & Office:
  • Description:
    Lateral spreading is a prevalent geotechnical problem associated with earthquake-induced liquefaction, often occurring at gentle slopes of loose, saturated sand near bodies of water and causing significant damage to buried utilities. This study presents a deterministic approach to analyse lateral spreading behaviour using a modified Newmark analysis applied to a column of sliding blocks with degrading yield accelerations. The proposed sliding column approach exhibits reasonable agreement with a well-instrumented centrifuge test evaluating free-field lateral spreading. The analysis captures lateral spreading displacement throughout a soil profile, as well as shear strains and simplified earth pressures. The effect of light cementation is investigated, demonstrating notable arrest of lateral spreading displacements and pressures. Free-face effects are also evaluated for a liquefying layer of soil beneath a gentle, competent crustal slope, demonstrating notable lateral spreading behaviour with larger inclinations of liquefying soil. However, lateral spreading still occurred when considering a horizontal liquefying layer, realised due to inertial loading and differences between confining boundary forces. The approach can be utilised to efficiently analyse lateral spreading across a large spatial extent.
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  • Source:
    Géotechnique, 68(8), 699-712
  • DOI:
  • ISSN:
    0016-8505;1751-7656;
  • Publisher:
    Thomas Telford Ltd.
  • Document Type:
    Journal Article
  • Rights Information:
    Accepted Manuscript
  • Rights Statement:
    The NOAA IR provides access to this content under the authority of the government's retained license to distribute publications and data resulting from federal funding. While users may legally access this content, the copyright owners retain rights that govern the reproduction, redistribution, and re-use of this work. The user is solely responsible for complying with applicable copyright law.
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    Submitted
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