Article

Wood Science and Technology

, Volume 33, Issue 1, pp 15-29

Prediction of the load carrying capacity of bolted timber joints

  • L. DaudevilleAffiliated withLaboratoire de Mécanique et Technologie, ENS Cachan/CNRS/Université Paris 6, 61 avenue du Président Wilson, 94235 Cachan, France email: Laurent.Daudeville@lmt.ens-cachan.fr
  • , L. DavenneAffiliated withLaboratoire de Mécanique et Technologie, ENS Cachan/CNRS/Université Paris 6, 61 avenue du Président Wilson, 94235 Cachan, France email: Laurent.Daudeville@lmt.ens-cachan.fr
  • , M. YasumuraAffiliated withDepartment of Forest Resources Science, Faculty of Agriculture, Shizuoka University, 836 Ohya, Shizuoka 422, Japan

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Abstract

Failure of bolted timber joints is analyzed experimentally and numerically. In this study, the prediction of the load-carrying capacity of dowel-type joints with one dowel under static loading is based on the analysis of fracture in wood contrarily to most engineering methods that are based on the yield theory. Mechanical joints consist of glued laminated spruce members and steel dowels. In the different analyzed tests, the bolt loads the wood parallel or perpendicular to the grain. The wood member thickness is chosen sufficiently thin to avoid the fastener from presenting plastic hinges. The influences of different structural parameters such as the dowel diameter, the edge- and end-distances are investigated. The fracture propagation analysis is carried out with the Finite Element (FE) method in the framework of Linear Elastic Fracture Mechanics (LEFM). The only identified parameter is the critical energy release rate in mode I (GIc). The comparison between experimental and numerical results shows that the fracture must be considered for a correct prediction of the ultimate load and that LEFM can help to improve design codes.