Centrifuge modeling and analysis of soil structure interaction under biaxial dynamic excitations

Omar El Shafee, Tarek Abdoun, Mourad Zeghal

    Research output: Contribution to journalConference article

    Abstract

    The paper presents a centrifuge test of a level site consisting of granular soil deposits and an embedded structure subjected to various bi-axial base excitations. The test was conducted at RPI NEES centrifuge facility to assess the dynamic response characteristics of soil-structure interaction (SSI) under multidimensional conditions. Synthetic sinusoidal waves were used as base excitations to test dense model under biaxial shaking. A dense array of accelerometers was used to monitor the deposit response (beneath and outside of the structure, along with pore water pressure transducers. The observed acceleration and pore pressure are used along with non-parametric identification procedures to estimate the corresponding dynamic shear stress-strain histories. The measured results along with the obtained histories are used for two purposes. First, to shed light on the mechanisms of soil-structure interaction under biaxial shaking. Secondly, to show the difference in soil behavior at different locations beneath the footing when subjected to biaxial shaking. The later objective is evident when comparing soil stress-strain loops and dilation behavior at locations beneath the structure, and those measured in the free field.

    Original languageEnglish (US)
    Pages (from-to)37-47
    Number of pages11
    JournalGeotechnical Special Publication
    Issue numberGSP 281
    DOIs
    StatePublished - Jan 1 2017
    EventGeotechnical Frontiers 2017 - Orlando, United States
    Duration: Mar 12 2017Mar 15 2017

    Fingerprint

    centrifugal model test
    Soil structure interactions
    soil-structure interaction
    Centrifuges
    centrifuge
    Soils
    Deposits
    soil
    Pressure transducers
    accelerometer
    Pore pressure
    dilation
    footing
    transducer
    history
    dynamic response
    Accelerometers
    pore pressure
    shear stress
    Dynamic response

    ASJC Scopus subject areas

    • Architecture
    • Civil and Structural Engineering
    • Building and Construction
    • Geotechnical Engineering and Engineering Geology

    Cite this

    Centrifuge modeling and analysis of soil structure interaction under biaxial dynamic excitations. / El Shafee, Omar; Abdoun, Tarek; Zeghal, Mourad.

    In: Geotechnical Special Publication, No. GSP 281, 01.01.2017, p. 37-47.

    Research output: Contribution to journalConference article

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    AB - The paper presents a centrifuge test of a level site consisting of granular soil deposits and an embedded structure subjected to various bi-axial base excitations. The test was conducted at RPI NEES centrifuge facility to assess the dynamic response characteristics of soil-structure interaction (SSI) under multidimensional conditions. Synthetic sinusoidal waves were used as base excitations to test dense model under biaxial shaking. A dense array of accelerometers was used to monitor the deposit response (beneath and outside of the structure, along with pore water pressure transducers. The observed acceleration and pore pressure are used along with non-parametric identification procedures to estimate the corresponding dynamic shear stress-strain histories. The measured results along with the obtained histories are used for two purposes. First, to shed light on the mechanisms of soil-structure interaction under biaxial shaking. Secondly, to show the difference in soil behavior at different locations beneath the footing when subjected to biaxial shaking. The later objective is evident when comparing soil stress-strain loops and dilation behavior at locations beneath the structure, and those measured in the free field.

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