TECHNICAL PAPERS
Nov 1, 1988

Effect of Loading Rate on Nailed Timber Joint Capacity

Publication: Journal of Structural Engineering
Volume 114, Issue 11

Abstract

The present study addresses the loading or deformation rate effect on the yield loads of nailed timber joints. Four different types of joints, which differed with respect to the thickness of the members and the angle of load to grain, were tested. The bearing strength of the wood and the bending strength of the nails were also tested in order to analytically verify the dynamic ultimate capacity of the joints. All tests were run with deformation rates from static loading values up to approximately 1 m/s (40 in./s). The pilot study results show that the strength of the nailed joints can be expressed in terms of the deformation rate. A logarithmic expression for the strength of the joints was obtained from regression analysis of approximately 200 results. The values obtained analytically agreed well with the experimental ones for the various joints tested.

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References

1.
American Society for Testing and Materials. (1978). ASTM 1978 part 22, American Society for Testing Materials, Philadelphia, Pa.
2.
Antonides, C. E., et al. (1980). “Interlayer gap effect on nailed joint stiffness,” Wood Science, 13(1), 41–46.
3.
NORDTEST Method. (1981a). “Nails in wood: Lateral strength.” NORDTEST, NT Build 133.
4.
NORDTEST Method. (1981b). “Nails in wood: Embedding strength.” NORDTEST, NT Build 135.
5.
NORDTEST Method. (1981c). “Nails in wood: Bending strength.” NORDTEST, NT Build 136.
6.
Andersson, H. (1983). “Influence of the loading rate on the load‐bearing strength of timber joints.” Royal Institute of Technology, Department of Steel Construction, Master Thesis, Stockholm, (in Swedish).
7.
Johansen, K. W. (1949). “Theory of timber connections.” International Association for Bridge and Structural Engineering, Vol. 9, Zürich.
8.
Möller, T. (1951). “A new method for calculation of nailed joints.” Chalmers University of Technology, Transactions No. 117, Götenborg (in Swedish).
9.
Larsen, H. J. (1973). “The yield load of bolted and nailed joints.” Proceedings of the International Union of Forestry Research Organization, Division 5 Conference, 646–654.
10.
McLain, T. E., and Thangjitham, S. (1983). “Bolted wood‐joint yield model.” J. Struc. Engrg., 109(8), 1820–1835.
11.
Girhammar, U. A., and Andersson, H. (1986). “Influence of loading rate on the capacity of nailed timber joints.” Royal Swedish Fortifications Administration, Research Department, Report A5:86, Eskilstuna.
12.
National design specification for wood construction. (1982). National Forest Products Association, Washington, D.C.

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Published In

Go to Journal of Structural Engineering
Journal of Structural Engineering
Volume 114Issue 11November 1988
Pages: 2439 - 2456

History

Published online: Nov 1, 1988
Published in print: Nov 1988

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Authors

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Ulf Arne Girhammar
Res. Prof., Royal Swedish Fortifications Administration, Res. Dept., S‐631 89 Eskilstuna, Sweden
Hakan Andersson
Grad. Student, Royal Inst. of Tech., Dept., of Steel Construction, Sweden

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