Stiffness and slip in multi-dowel flitch-plate timber connections
Open accessAbstract
Large multi-dowel connections can provide the strong and ductile connections required for large, highly-loaded timber structures, but their slip under load is not well understood. This is important because accumulated local displacements at connections can have significant implications for overall building serviceability. Empirical relationships for the slip of a single-dowel connection do not capture the dowel interaction effects of the multi-dowel connections used in larger structures. We present the results of an experimental test series and probabilistic numerical analysis investigating the development of stiffness in multi-dowel timber flitch plate connections. The influence of the diameter and number of dowels on the stiffness of the connection are investigated, including the influence of off-centring of dowels due to manufacturing tolerances. The test series is used to validate a probabilistic model for the stiffness of such a connection. The model incorporates the nonlinear stiffness and hole opening observed in single-dowel connections to predict the behaviour of the group. The study shows that the random off-centring of dowels in multi-dowel connections reduces the range of displacements over which the connection displays zero stiffness, but that this zone is not eliminated as a result of irreversible hole opening under load.
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For timber structures, it is crucial that joints retain their stiffness and tolerances, i.e., limit embedment deformation that creates slip.
“For timber structures, it is crucial that joints retain their stiffness and tolerances, i.e., limit embedment deformation that creates slip [109], as will be elaborated in Section 2.4.”
From Design for adaptability, disassembly and reuse – A review of reversible timber connection systems (2023) · cites this paper as [109]
The Introduction (p. 123) says connection deformation matters for structural deflection and vibration, and that opening of the timber hole produces slip. It also says manufacturing tolerances can cause random dowel off-centring that mitigates zero stiffness; it does not say joints must ‘retain their tolerances’ or that tighter tolerances necessarily limit slip. (LLM, conf=0.84)
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Research works printed but not linked: 6
- R. B. Abrahamsen. Bridge across Rena River - "World's strongest timber bridge." In World Conference on Timber Engineering, 2008. Miyazaki, Japan.
- K. A. Malo, R. B Abrahamsen, and M. A. Bjertnæs. Some structural design issues of the 14-storey timber framed building "Treet" in Norway. European Journal of Wood and Wood Products, 1-18, 2016.
- Malo, K. A., Abrahamsen, R. B., & Bjertnæs, M. A. (2016). Some structural design issues of the 14-storey timber framed building "Treet" in Norway. European Journal of Wood and Wood Products, 1-18.
- Reynolds, T., Harris, R., & Chang, W.-S. (2013). Viscoelastic embedment behaviour of dowels and screws in timber under in-service vibration. European Journal of Wood and Wood Products, 71(5), 623-634.
- Dorn, M., de Borst, K., & Eberhardsteiner, J. (2013). Experiments on dowel-type timber connections. Engineering Structures, 47(0), 67-80.
- T. Reynolds, R. Harris, and W.-S. Chang. Stiffness of dowel-type timber connections under pre-yield oscillating loads. Engineering Structures, 65(0), 21- 29, 2014.
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Design for adaptability, disassembly and reuse – A review of reversible timber connection systems
Ottenhaus, L.-M., Yan, Z., Brandner, R., Leardini, P., Fink, G., & Jockwer, R. (2023) · Construction and Building Materials · doi:10.1016/j.conbuildmat.2023.132823 · Cited by 100 · see citing works
- Authors
- Reynolds, T., Miranda, W., Trabucco, D., Toumpanaki, E., Foster, R., & Ramage, M.
- Affiliations
- University of Edinburgh (GB)
- Università Iuav di Venezia (IT)
- University of Cambridge (GB)
- Venue
- Apollo - University of Cambridge Repository
- Publisher
- Apollo - University of Cambridge Repository
- Published
- 2018-01-01
- OpenAlex
- W2918418979
- Cited by
- 0
- References
- 0
- FWCI
- 0.00
- Type
- journal article
- Language
- en
- Open access
- Locations
- Edinburgh Research Explorer (University of Edinburgh) (submittedVersion)
- Bristol Research (University of Bristol) (submittedVersion, other-oa)
- Cambridge University Engineering Department Publications Database (submittedVersion)
- Apollo (University of Cambridge) (submittedVersion)
- Apollo
- Funders
- Engineering and Physical Sciences Research Council (EP/M01679X/1)
- Leverhulme Trust (RP2013-SL-008)
- Topics
- Physical Sciences › Engineering › Building and Construction › Wood Treatment and Properties
- Physical Sciences › Engineering › Civil and Structural Engineering › Structural Load-Bearing Analysis
- Physical Sciences › Engineering › Civil and Structural Engineering › Structural Engineering and Materials Analysis
- Keywords
- timber connections, connection stiffness, manufacturing tolerances, nonlinear stiffness, stochastic modeling, timber structures
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