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Bond line models of glued wood-to-steel plate joints

Larsson, Gustaf LU ; Gustafsson, Per Johan LU ; Serrano, Erik LU and Crocetti, Roberto LU (2016) In Engineering Structures 121. p.160-169
Abstract

The competitiveness of timber as structural material in large structures is often governed by the cost of structural joints. Tests indicate that the new joint concept presented herein using glued wood-to-steel plate joints can possibly reduce the cost by matching joint strength to member strength. The design is inspired by two previously proposed designs using a single large dowel and using a rubber foil interlayer in adhesive joints. Analytical 1D and numerical 3D models of the bond line are proposed in order to further develop the concept, both in the case of a traditional adhesive joint and for the innovative rubber foil adhesive joint.The glued wood-to-steel plate joints studied are lap joints with a load bearing capacity assumed to... (More)

The competitiveness of timber as structural material in large structures is often governed by the cost of structural joints. Tests indicate that the new joint concept presented herein using glued wood-to-steel plate joints can possibly reduce the cost by matching joint strength to member strength. The design is inspired by two previously proposed designs using a single large dowel and using a rubber foil interlayer in adhesive joints. Analytical 1D and numerical 3D models of the bond line are proposed in order to further develop the concept, both in the case of a traditional adhesive joint and for the innovative rubber foil adhesive joint.The glued wood-to-steel plate joints studied are lap joints with a load bearing capacity assumed to be governed by failure within or along the bond line. In the 1D and 3D structural models both linear elastic and non-linear fracture mechanics were applied, with the non-linear fracture mechanics model taking into account the gradual damage fracture softening in a fracture zone. For the conventional type of bond line it was found that bond line softening needs to be considered for adequate strength analysis while it was not needed for a bond line with a rubber foil.The computational results are compared to previous full scale test results. The numerical results show good agreement and the analytical results reasonable agreement. When using a high strength adhesive, the strength of the wood along the bond line is governing joint failure. For this case, the analyses predict a 150% load bearing capacity increase by the introduction of a rubber foil as compared to a traditional design. The test results indicated an even higher increase.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Numerical analysis, Numerical model, Rubber foil connection, Shear plate dowel joint, Timber structure, Wood-to-steel plate joints
in
Engineering Structures
volume
121
pages
10 pages
publisher
Elsevier
external identifiers
  • Scopus:84965132287
ISSN
0141-0296
DOI
10.1016/j.engstruct.2016.04.053
language
English
LU publication?
yes
id
f00ac71e-f5f8-4245-8d8f-7512c4ee417c
date added to LUP
2016-07-08 08:23:42
date last changed
2016-07-08 08:23:42
@misc{f00ac71e-f5f8-4245-8d8f-7512c4ee417c,
  abstract     = {<p>The competitiveness of timber as structural material in large structures is often governed by the cost of structural joints. Tests indicate that the new joint concept presented herein using glued wood-to-steel plate joints can possibly reduce the cost by matching joint strength to member strength. The design is inspired by two previously proposed designs using a single large dowel and using a rubber foil interlayer in adhesive joints. Analytical 1D and numerical 3D models of the bond line are proposed in order to further develop the concept, both in the case of a traditional adhesive joint and for the innovative rubber foil adhesive joint.The glued wood-to-steel plate joints studied are lap joints with a load bearing capacity assumed to be governed by failure within or along the bond line. In the 1D and 3D structural models both linear elastic and non-linear fracture mechanics were applied, with the non-linear fracture mechanics model taking into account the gradual damage fracture softening in a fracture zone. For the conventional type of bond line it was found that bond line softening needs to be considered for adequate strength analysis while it was not needed for a bond line with a rubber foil.The computational results are compared to previous full scale test results. The numerical results show good agreement and the analytical results reasonable agreement. When using a high strength adhesive, the strength of the wood along the bond line is governing joint failure. For this case, the analyses predict a 150% load bearing capacity increase by the introduction of a rubber foil as compared to a traditional design. The test results indicated an even higher increase.</p>},
  author       = {Larsson, Gustaf and Gustafsson, Per Johan and Serrano, Erik and Crocetti, Roberto},
  issn         = {0141-0296},
  keyword      = {Numerical analysis,Numerical model,Rubber foil connection,Shear plate dowel joint,Timber structure,Wood-to-steel plate joints},
  language     = {eng},
  month        = {08},
  pages        = {160--169},
  publisher    = {ARRAY(0xb58c318)},
  series       = {Engineering Structures},
  title        = {Bond line models of glued wood-to-steel plate joints},
  url          = {http://dx.doi.org/10.1016/j.engstruct.2016.04.053},
  volume       = {121},
  year         = {2016},
}