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    Nonlinear Lateral, Rocking, and Torsional Vibration of Rigid Foundations

    Source: Journal of Geotechnical Engineering:;1994:;Volume ( 120 ):;issue: 003
    Author:
    Ronaldo I. Borja
    ,
    Wen‐Hwa Wu
    ,
    Alexander P. Amies
    ,
    H. Allison Smith
    DOI: 10.1061/(ASCE)0733-9410(1994)120:3(491)
    Publisher: American Society of Civil Engineers
    Abstract: Two‐ and three‐dimensional finite element (FE) analyses are performed to investigate the influence of nonlinear soil behavior on the dynamic response of harmonically excited rigid foundations. Lateral, rocking, and torsional vibration modes are considered. An elastoviscoplastic constitutive model with kinematic hardening is assumed for the foundation soil, and computations are done implicitly in the time domain. The foundation responses for lateral, rocking, and torsional modes are characterized by increased vibrational amplitudes due to material stiffness degradation. Furthermore, resonance frequencies are created that resemble those observed for vertically oscillating finite‐size foundations. Nonlinear soil effects are shown to be dominant over a wide range of excitation frequencies for foundations vibrating in torsional and lateral modes. In contrast, nonlinear soil effects are shown to be dominant over a much narrower range of excitation frequencies for the rocking mode. The methodology presented in this paper is useful for nonlinear vibration and transient soil‐structure interaction (SSI) analysis.
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      Nonlinear Lateral, Rocking, and Torsional Vibration of Rigid Foundations

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    http://yetl.yabesh.ir/yetl1/handle/yetl/21396
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    contributor authorRonaldo I. Borja
    contributor authorWen‐Hwa Wu
    contributor authorAlexander P. Amies
    contributor authorH. Allison Smith
    date accessioned2017-05-08T20:37:11Z
    date available2017-05-08T20:37:11Z
    date copyrightMarch 1994
    date issued1994
    identifier other%28asce%290733-9410%281994%29120%3A3%28491%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/21396
    description abstractTwo‐ and three‐dimensional finite element (FE) analyses are performed to investigate the influence of nonlinear soil behavior on the dynamic response of harmonically excited rigid foundations. Lateral, rocking, and torsional vibration modes are considered. An elastoviscoplastic constitutive model with kinematic hardening is assumed for the foundation soil, and computations are done implicitly in the time domain. The foundation responses for lateral, rocking, and torsional modes are characterized by increased vibrational amplitudes due to material stiffness degradation. Furthermore, resonance frequencies are created that resemble those observed for vertically oscillating finite‐size foundations. Nonlinear soil effects are shown to be dominant over a wide range of excitation frequencies for foundations vibrating in torsional and lateral modes. In contrast, nonlinear soil effects are shown to be dominant over a much narrower range of excitation frequencies for the rocking mode. The methodology presented in this paper is useful for nonlinear vibration and transient soil‐structure interaction (SSI) analysis.
    publisherAmerican Society of Civil Engineers
    titleNonlinear Lateral, Rocking, and Torsional Vibration of Rigid Foundations
    typeJournal Paper
    journal volume120
    journal issue3
    journal titleJournal of Geotechnical Engineering
    identifier doi10.1061/(ASCE)0733-9410(1994)120:3(491)
    treeJournal of Geotechnical Engineering:;1994:;Volume ( 120 ):;issue: 003
    contenttypeFulltext
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