STP992

    Analysis and Test of a Torsional Sensitive C-Shaped Prefabricated Brick Spandrel Panel

    Published: Jan 1988


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    Abstract

    Recognizing the inherent torsional flexibility of an open C-section, the authors analyzed in detail the dead and live load behavior of the section under review. The section consisted of a sloping sill, a vertical spandrel, and a horizontal soffit configuration fabricated as a continuous bent plate. The three planes when joined together form an open C-section. To explore the stress patterns in this shaped plate, the authors modeled the analysis for a hand solution. This was then compared to a more rigorous solution using a finite-element computer approach.

    The hand approach determined the principal axes of inertia, the shear centers, and the principal states of stress by Mohr's circle. Comparison is shown with graphic plots of principal stresses from the finite-element analysis. The latter technique makes a detailed investigation possible, including plots of both principal tensile and shearing stresses. The modeling of the complex metal embedments at each reaction location was also possible by the finite-element solution.

    Full-scale testing of the panel was made utilizing dead weight from brick loading platforms that exerted gravity and wind loading on the spandrel panel through a series of compound lever frames. Contrary to results of brittle torsional failure expected from the analytical work, the experimental behavior demonstrated a capacity to a load factor of five without cracking or collapse.

    Keywords:

    prefabricated brick panels, reinforced structural masonry, torsional sensitive, C-shaped cross section, full-scale testing, combined wind and gravity forces, unique compound lever loading system


    Author Information:

    Arnold, RC
    Engineer II, senior engineer, engineer II, and senior consultant, Wiss, Janney, Elstner Associates, Inc., Northbrook, IL

    Dondanville, LJ
    Engineer II, senior engineer, engineer II, and senior consultant, Wiss, Janney, Elstner Associates, Inc., Northbrook, IL

    Krogstad, NV
    Engineer II, senior engineer, engineer II, and senior consultant, Wiss, Janney, Elstner Associates, Inc., Northbrook, IL

    Monk, CB
    Engineer II, senior engineer, engineer II, and senior consultant, Wiss, Janney, Elstner Associates, Inc., Northbrook, IL


    Paper ID: STP27264S

    Committee/Subcommittee: C15.02

    DOI: 10.1520/STP27264S


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