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    Volume 38, Issue 1 (January 2015)

    Large Soil Confinement Box for Seismic Performance Testing of Geo-Structures

    (Received 18 February 2014; accepted 8 September 2014)

    Published Online: 22 January 2015

    CODEN: GTJODJ

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    Abstract

    A large soil confinement box (LSCB) has been designed and constructed for seismic performance testing of large-scale geo-structures on the large high performance outdoor shake table (LHPOST) at the University of California–San Diego (UCSD). The LSCB is a rigid rectangular box with an open roof that covers the footprint of the LHPOST and has interior dimensions of 10.1 m (length) by 7.6 m (height) by 4.6 m or 5.8 m (width), depending upon assembly configuration. Boundary treatments are used to reduce side friction on the longitudinal walls and prevent slippage at the base. Shaking tests conducted on the empty LSCB indicate first resonance at 22–23 Hz, which is above the normal operating frequency of the LHPOST and should not significantly affect the measured dynamic response of geo-structure specimens. Tests conducted for a mechanically stabilized earth (MSE) retaining wall and two rocking bridge foundations indicate the versatility of the LSCB, including the capability to incorporate a liner and add water for tests on foundation soils with a shallow phreatic surface.


    Author Information:

    Fox, Patrick J.
    Professor, Department of Structural Engineering, Univ. of California–San Diego, La Jolla, CA

    Sander, Andrew C.
    Department of Structural Engineering, Univ. of California–San Diego, La Jolla, CA

    Elgamal, Ahmed
    Professor, Department of Structural Engineering, Univ. of California–San Diego, La Jolla, CA

    Greco, Paul
    Manager, Powell and Englekirk Laboratories, Univ. of California–San Diego, La Jolla, CA

    Isaacs, Daniel
    Staff Engineer, Kleinfelder/Simon Wong Engineering, San Diego, CA

    Stone, Matthew
    Staff Engineer, Kleinfelder/Simon Wong Engineering, San Diego, CA

    Wong, Simon
    Principal, Kleinfelder/Simon Wong Engineering, San Diego, CA


    Stock #: GTJ20140034

    ISSN:0149-6115

    DOI: 10.1520/GTJ20140034

    Author
    Title Large Soil Confinement Box for Seismic Performance Testing of Geo-Structures
    Symposium ,
    Committee D18