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    Volume 41, Issue 1 (January 2018)

    Shaking Table Test of a Half-Scale Geosynthetic-Reinforced Soil Bridge Abutment

    (Received 24 October 2016; accepted 28 June 2017)

    Published Online: 2017

    CODEN: GTJODJ

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    Abstract

    This paper presents an experimental study on the dynamic response of a half-scale geosynthetic-reinforced soil (GRS) bridge abutment system using a shaking table. Experimental design of the model specimen followed established similitude relationships for shaking table tests on reduced-scale models in a 1-g gravitational field, including scaling of model geometry, geosynthetic-reinforcement stiffness, backfill soil modulus, bridge load, and characteristics of the earthquake motions. The 2.7-m-high GRS bridge abutment was constructed using well-graded sand backfill, modular facing blocks, and uniaxial geogrid reinforcements with a vertical spacing of 0.15 m in both the longitudinal and transverse directions. A bridge beam was placed on the GRS bridge abutment at one end and on a concrete support wall resting on a sliding platform off the shaking table at the other end. The GRS bridge abutment system was subjected to a series of input motions in the longitudinal direction. Results indicate that the testing system performed well, and that the GRS bridge abutment experienced small deformations. For two earthquake motions, the maximum incremental residual facing displacement in model scale was 1.0 mm, and the average incremental residual bridge seat settlement in model scale was 1.4 mm, which corresponds to a vertical strain of 0.7 %.

    Author Information:

    Zheng, Yewei
    Department of Structural Engineering, University of California, San Diego, La Jolla, CA

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

    Rong, Wenyong
    Department of Structural Engineering, University of California, San Diego, La Jolla, CA

    Fox, Patrick J.
    Department of Civil and Environmental Engineering, Pennsylvania State University, University Park, PA

    Shing, P. Benson
    Department of Structural Engineering, University of California, San Diego, La Jolla, CA

    McCartney, John S.
    Department of Structural Engineering, University of California, San Diego, La Jolla, CA


    Stock #: GTJ20160268

    ISSN:0149-6115

    DOI: 10.1520/GTJ20160268

    Author
    Title Shaking Table Test of a Half-Scale Geosynthetic-Reinforced Soil Bridge Abutment
    Symposium ,
    Committee D35