Parameter Study of an Internal Timber Tension Connection
Publication: Journal of Structural Engineering
Volume 122, Issue 4
Abstract
Preliminary results from a project studying the behavior of a hidden timber tension connections are presented. The connection consists of a threaded steel rod inserted in a longitudinal hole along the central axis of a timber member, with a bearing plate and nut fitted on to the end of the rod in a specially cut mortise. This assembly was tested under pure axial load statically applied to the steel rod and the timber member. Observed failure modes are described and photographic documentation of failed connections is presented. Failure mode distribution is shown as a function of two physical parameters, the size of the bearing plate and the distance from the bearing plate to the end of the member, and a comparison is made with theoretical failure-mode domains derived from National Design Specification allowable stresses. The correlation of variations in the physical parameters with ultimate strength and ductility is also discussed. Initial results show the connection to be predictable, ductile, and potentially economical.
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References
1.
American Institute of Timber Construction. (1987). “Checking in glued laminated timber.”Tech. Note No. 11, American Institute, Englewod, Colo.
2.
American Institute of Timber Construction. (1988). “Manufacturing standard specifications for structural glued laminated timber of softwood species.”AITC 117-88, Englewood, Colo.
3.
American Institute of Timber Construction. (1991). “Evaluation of checking in glued laminated timbers.”Tech. Note No. 18, Englewood, Colo.
4.
Bertche, P. (1992). “A new connecting system for engineered wood constructions.”Proc., 1992 Int. Workshop on Wood Connectors, Forest Products Soc., Madison, Wisc., 65–66.
5.
Bjorhovde, R., and Suddarth, S. K. (1992). “Research needs for wood connectors and connections.”Proc., 1992 International Workshop on Wood Connectors, Forest Products Soc., Madison, Wisc., 147–148.
6.
Buchanan, A. H., Moss, P. J., and Townsend, P. K. (1990). “Reinforcing bars epoxy bonded in glue laminated timber.”Proc., 1990 Int. Timber Engrg. Conf., Sci. Univ. of Tokyo, Tokyo, Japan, 601–610.
7.
Design values for wood construction: a supplement to the 1991 edition national design specifications for wood construction. (1991). Am. Forest and Paper Assoc., Washington, D.C.
8.
Duff, S. F. (1992). “Experimental testing of two heavy timber tension connections,” M.S. CE299 Final Project, Univ. of California at Berkeley, Calif.
9.
Kazuo, G. (1990). “Structure to make good use of energy-absorption at joints.”Proc., 1990 Int. Timber Engrg. Conf., Sci. Univ. of Tokyo, Tokyo, Japan, 262–263.
10.
Landau, C. (1993). “Joinery decisions.”Timber Framing, (27, March), 10–14.
11.
National design specification for wood construction. (1991). Am. Forest and Paper Assoc., Washington, D.C.
12.
Riberholt, H. (1986). `Glued bolts in glulam.”Rep. Ser. R, No. 210, Dept. of Struct. Engrg., Tech. Univ. of Denmark, Lyngby, Denmark.
13.
Schock, H. J. (1990). “Concealed joints in wood structures—An overview.”Proc., 1990 Int. Timber Engrg. Conf., Sci. Univ. of Tokyo, Tokyo, 264–271.
14.
Standard practice for establishing structural grades and related allowable properties for visually graded lumber; D245-88. (1988a). ASTM, Philadelphia, Pa.
15.
Standard test methods for establishing clear wood strength values; D2555-88. (1988b). ASTM, Philadelphia, Pa.
16.
Standard test methods for mechanical fasteners in wood; D1761-88. (1988c). ASTM, Philadelphia, Pa.
17.
Syme, D. R. (1989). “Timber jointing systems in Europe.”Proc., 2nd Pacific Timber Engrg. Conf., Univ. of Auckland, New Zealand, 137–142.
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Copyright © 1996 American Society of Civil Engineers.
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Published online: Apr 1, 1996
Published in print: Apr 1996
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