A Low-Compliance Bi-Directional Cyclic Simple Shear Apparatus

    Volume 16, Issue 1 (March 1993)

    ISSN: 0149-6115

    CODEN: GTJOAD

    Page Count: 10


    Boulanger, RW
    Assistant professor, University of California (U.C.), Davis, CA

    Chan, CK
    Senior research engineer, U.C., Berkeley, CA

    Seed, HB
    Professor of Civil Engineering, U.C.,

    Seed, RB
    Professor, U.C., Berkeley, CA

    Sousa, JB
    Assistant research engineer, U.C., Berkeley, CA

    Abstract

    A new simple shear apparatus is described which can apply bi-directional simple shear cyclic and monotonic loading. Cylindrical specimens are placed in a pressure chamber so that confining pressure and back pressure can be applied. Bi-directional shear loads are applied to the specimen's base, which is mounted on a series of two horizontal rolling tables which can be independently loaded in two orthogonal directions while preventing cap and base platen “rocking.” A computer-automated feedback-loop-controlled pneumatic servovalve system provides excellent control of loads and displacements. Displacement control during cyclic tests on softening specimens is improved by the inclusion of a parallel stiffness. Procedures and test results are presented for three different undrained cyclic simple shear loading conditions and for a strain-controlled monotonic loading condition.


    Paper ID: GTJ10265J

    DOI: 10.1520/GTJ10265J

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    Author
    Title A Low-Compliance Bi-Directional Cyclic Simple Shear Apparatus
    Symposium , 0000-00-00
    Committee D18