TECHNICAL PAPERS
Jul 1, 1993

Bolted Connection Design Values Based on European Yield Model

Publication: Journal of Structural Engineering
Volume 119, Issue 7

Abstract

This paper discusses the calibration of connection strengths predicted by the European yield model (EYM) to the design values for bolted connections tabulated in the 1986 National Design Specification (NDS). Predicted EYM strengths were compared with 1986 NDS design values to arrive at recommended calibration factors for two‐ and three‐member connections with wood and steel side members loaded parallel and perpendicular to grain over the design space. Design values were changed as a result of basing the bolt‐bearing strength of the wood on the specific gravity of a species. Use of Hankinson's formula with bolt‐bearing strength was found to be more expedient for loads at an angle to the grain than using the formula with design values for parallel‐ and perpendicular‐to‐grain loading. The recommended calibration factors result in some increases and decreases in design values. These factors have been incorporated into the 1991 NDS and a proposed specification for load and resistance factor design (LRFD).

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References

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Doyle, D. V. (1968). “Properties of No. 2 dense kiln‐dried southern pine dimension lumber.” Res. Paper FPL 96, U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, Madison, Wisc.
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Johansen, K. W. (1949). “Theory of timber connections.” Int. Assoc. for Bridge and Struct. Engrg., 9, 249–262.
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Larsen, H. J. (1973). “The yield of bolted and nailed joints.” Proc., Div. V Conf., Int. Union of Forestry Res. Org., 646–654.
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McLain, T. E. (1981). “Influence of metal side plates on the strength of bolted wood joints.” Final Rep., National Forest Products Association, Washington, D.C.
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McLain, T. E., and Thangjitham, S. (1983). “Bolted wood joint yield model.” J. Struct. Engrg., ASCE, 109(8), 1820–1835.
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National design specification. (1986). National Forest Products Association, Washington, D.C.
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National design specification. (1991). National Forest Products Association, Washington, D.C.
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Soltis, L. A., and Wilkinson, T. L. (1987). “Bolted‐connection design,” Gen. Tech. Rep. FPL‐GTR‐54, U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, Madison, Wisc.
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Soltis, L. A., Hubbard, F. K., and Wilkinson, T. L. (1986). “Bearing strength of bolted timber joints.” J. Struct. Engrg., ASCE, 112(9), 2141–2154.
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Wilkinson, T. L. (1978). “Strength of bolted wood joints with various ratios of member thicknesses.” Res. Pap. FPL 314, U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, Madison, Wisc.
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Information & Authors

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Published In

Go to Journal of Structural Engineering
Journal of Structural Engineering
Volume 119Issue 7July 1993
Pages: 2169 - 2186

History

Received: Oct 14, 1991
Published online: Jul 1, 1993
Published in print: Jul 1993

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Authors

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T. L. Wilkinson
Res. General Engr., USDA Forest Service, Forest Products Lab., Madison, WI 53705‐2398

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