Strength Capacities and Behavior of New Composite Timber-Steel Connector
Publication: Journal of Structural Engineering
Volume 127, Issue 8
Abstract
This paper examines the strength properties of a new timber connector that consists of a sectioned steel tube embedded into the end grain of heavy-timber structural members using a vinyl-ester based mortar. The steel cap of the connector features a threaded hole that allows for the attachment of a variety of connecting steel elements. Connectors were tested in tension and compression in spruce glulam and in tension in parallel strand lumber. Lateral loading tests were performed on single and double connector arrangements with different edge distances and member sizes using spruce glulam members. An additional test series was conducted on specimens exposed to changing climatic environments over a period of 18 weeks prior to tension tests. Results of the tension and compression tests showed a low variation in strength and stiffness. Tension specimens showed an abrupt and brittle failure, indicating the requirement for a more controlled and ductile steel-element failure. Ductile behavior was observed in the compression tests resulting from the deformation characteristics of the wood. In addition, the connection showed a small reduction in strength after the climate cycles. A relationship between edge distance and lateral load capacity was established.
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References
1.
Barber, D. J. ( 1994). “Fire resistance of epoxied steel rods in glulam timber.” Res. Rep. 94/1, Dept. of Civ. Engrg., University of Canterbury, Christchurch, New Zealand.
2.
Bertsche, P. ( 1993). “A new connecting system for engineered wood constructions.” Proc., Int. Workshop on Wood Connectors, Forest Products Society, Madison, Wis., 65–66.
3.
Blaß, H. J., and Laskewitz, B. ( 1999). “Effect of spacing and edge distance on the axial strength of glued-in rods.” Proc., Meeting 32 Int. Council for Build. Res. Studies and Documentation, Working Commission W18—Timber Struct. (CIB-W18/29), Universität Karlsruhe, Karlsruhe, Germany.
4.
Buchanan, A. H., and Fairweather, R. H. ( 1993). “Epoxied moment-resisting connections for timber buildings.” Proc., Int. Workshop on Wood Connectors, Forest Products Society, Madison, Wis., 107–113.
5.
Buchanan, A. H., and Moss, P. ( 1999). “Design of epoxied steel rods in glulam timber.” Proc., Pacific Timber Engrg. Conf., New Zealand Forest Research Institute, Forest Research Bulletin No. 212, 286–293.
6.
Deutsches Institut für Normung e.V.—N. A. Bau (DIN). ( 1991). DIN EN 26 891 [7/91]—Holzbauwerke, Verbindungen mit mechanischen Verbindungsmitteln, Allgemeine Grundsätze für die Ermittlung der Tragfähigkeit, Beuth-Verlag, Berlin, (in German).
7.
Guan, Z. W. ( 1998). “Structural behavior of glued bolt joints using FRP.” Proc., 5th World Conf. on Timber Engrg., Swiss Federal Institute of Technology, Lausanne, Switzerland, 1265–1272.
8.
Inoue, M., Tanaka, K., Okibayashi, S., Shimizu, T., and Goto, Y. ( 1999). “Structural behavior of box beam jointed by new connecting system.” Proc., Pacific Timber Engrg. Conf., New Zealand Forest Research Institute, Forest Research Bulletin No. 212, 123–130.
9.
Johansson, C. J. ( 1995). “STEP lecture C14: Glued-in bolts.” Timber engineering STEP 1, H. J. Blaß, ed., Centrum Hout Almere, The Netherlands.
10.
Malczyk, R. ( 1993). “Glued-in re-bar connection.” M.A.Sc. thesis, Dept. of Civ. Engrg., University of British Columbia, Vancouver.
11.
Mettem, C. J., Bainbridge, R. J., Harvey, K., Ansell, M. P., Broughton, J. G., and Hutchinson, A. R. ( 1999). “Evaluation of material combinations for bonded in rods to achieve improved timber connections.” Proc., Meeting 32 Int. Council for Build. Res. Studies and Documentation, Working Commission W18—Timber Struct. (CIB-W18/29), Universität Karlsruhe, Karlsruhe, Germany.
12.
Riberholt, H. ( 1988). “Glued bolts in glulam—Proposals for CIB code.” Proc., Meeting 21 Int. Council for Build. Res. Studies and Documentation, Working Commission W18—Timber Struct. (CIB-W18/29), Universität Karlsruhe, Karlsruhe, Germany.
13.
Schreyer, A. ( 1998). “Determination of the capacities of a new composite timber-steel connection system, the TiSCo. Part 1—Report on the TiSCo Type A test series.” Dipl.-Ing. thesis, Fachhochschule (University of Applied Science) Wiesbaden, Germany, and University of British Columbia, Vancouver.
14.
Turkovsky, S. B. ( 1989). “Designing of glued wood structures joints on glued-in bars.” Proc., Meeting 22 Int. Council for Build. Res. Studies and Documentation, Working Commission W18—Timber Struct. (CIB-W18/29), Universität Karlsruhe, Karlsruhe, Germany.
15.
Wiktor, R. ( 1994). “Glulam connections using epoxy glued-in rebars.” M.A.Sc. thesis, Dept. of Civ. Engrg., University of British Columbia, Vancouver.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 127 • Issue 8 • August 2001
Pages: 888 - 893
History
Received: Jul 25, 2000
Published online: Aug 1, 2001
Published in print: Aug 2001
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