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    Author(s): Lawrence A. Soltis; Robert J. Ross; Daniel E. Windorski
    Date: 1997
    Source: Journal of contemporary wood engineering. Vol. 8, no. 3 (fall 1997): Pages 19-24
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (265 KB)

    Description

    Bolted connections often fail by a shear plug or by splitting beneath the bolt caused by tension perpendicular-to-grain stress as the bolt wedges its way through the wood. Preventing this type of failure enhances both the capacity and reliability of bolted connections. This research investigated the use of fiberglass reinforcement to enhance the load-carrying capacity of bolted wood connections. Matched specimens were reinforced with one, two, or three layers of bidirectional fiberglass cloth and configured to ensure a Mode I failure as defined by the yield theory in the National Design Specification. A total of 80 single-bolt, double-shear connections were tested, with 40 loaded parallel-to-grain and 40 perpendicular-to-grain. For parallel-to-grain loading, the reinforcement changed the mode of failure from an abrupt, catastrophic type associated with tension perpendicular-to-grain stress to a ductile type associated with bearing stress. These results are applicable to Mode I failures where surface reinforcement is most effective; smaller increases in strength are expected for thicker main members that experience Modes III and IV failures.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Soltis, Lawrence A.; Ross, Robert J.; Windorski, Daniel E. 1997. Effect of fiberglass reinforcement on the behavior of bolted wood connections. Journal of contemporary wood engineering. Vol. 8, no. 3 (fall 1997): Pages 19-24

    Keywords

    Fiberglass reinforcement, bolted wood connections, failure

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