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Contact-free measurement and numerical and analytical evaluation of the strain distribution in a wood-FRP lap-joint
Linnaeus University, Faculty of Science and Engineering, School of Engineering. (Byggteknik)
Linnaeus University, Faculty of Science and Engineering, School of Engineering. (Byggteknik)ORCID iD: 0000-0002-5333-0682
Linnaeus University, Faculty of Science and Engineering, School of Engineering. (Byggteknik)
2010 (English)In: Materials and Structures, ISSN 1359-5997, E-ISSN 1871-6873, Vol. 43, no 8, p. 1085-1095Article in journal (Refereed) Published
Abstract [en]

Wood specimens to each of which alaminate of carbon fibre reinforcement polymers(FRP) was glued (creating a lap joint in each case)were loaded to failure. A total of 15 specimens ofthree types differing in the glued length (anchoragelength) of the FRP laminate (50, 150 and 250 mmrespectively) were tested, their strength, stiffness andstrain distribution being evaluated. Synchronizeddigital cameras (charge-coupled devices) used intesting enabled strain fields on surfaces they weredirected at during the loading procedure to bemeasured. These results were also evaluated bothanalytically on the basis of generalized Volkersentheory and numerically by use of the finite elementmethod. The lap joints showed a high level ofstiffness as compared with mechanical joints. A highdegree of accuracy in the evaluation of stiffness wasachieved through the use of the contact-free evaluationsystem. The load-bearing capacity of joints ofthis type was found to be dependent upon theanchorage length in a non-linear fashion. The experimental,analytical and numerical results were shownto be in close agreement with respect to the strengthand the strain distribution obtained.

Place, publisher, year, edition, pages
Springer , 2010. Vol. 43, no 8, p. 1085-1095
Keywords [en]
FRP Lap-joint Volkersen Wood
National Category
Building Technologies
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
URN: urn:nbn:se:vxu:diva-6877DOI: 10.1617/s11527-009-9568-xOAI: oai:DiVA.org:vxu-6877DiVA, id: diva2:288733
Available from: 2010-01-21 Created: 2010-01-21 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Analysis of shear wallsfor multi-storey timber buildings
Open this publication in new window or tab >>Analysis of shear wallsfor multi-storey timber buildings
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This doctoral thesis addresses questions of how wind loads acting on multistoreytimber buildings can be dealt with by structural design of such buildings.The conventional use of sheathing either nailed or screwed to a timberframework is considered, together with other stabilizing structures such ascross-laminated timber panels.The finite element method was employed in simulating the structuralbehaviour of stabilizing wall units. A series of studies was carried out of walls inwhich the sheathing was nailed to a timber frame. Different structural levelswere studied starting with modelling the performance of single sheathing-toframingconnections, to the use of models for studying the overall structuralbehaviour of walls. The results of calculations using models for simulation ofwalls subjected to different loading agree reasonably well with experimentalresults. The structural properties of the connections between the sheathing andthe frame, as well as of the connections between the members of the frame,were shown to have a substantial effect on the simulated behaviour of shearwall units. Both these types of connections were studied and described inappended papers.Regarding cross-laminated timber wall panels, it was concluded that walls witha high level of both stiffness and strength can be produced by the use of suchpanels, and also that the connections between the solid wall panels can bedesigned in such a way that the shear forces involved are transmitted from onepanel to the next in an efficient manner.Other topics in the thesis include the properties of connections between shearwalls and the rest of the building. Typically high tension forces occur at specificpoints in a timber structure. These forces need to be transmitted downwards inthe structure, ultimately connecting them to the substrate. A lap-joint that maybe used for this purpose has been studied using generalized Volkersen theory.Finally the maximum capacity of a conventional rail to substrate connection hasbeen examined using linear and nonlinear fracture mechanics.

Place, publisher, year, edition, pages
Växjö, Kalmar: Linnaeus University Press, 2011
Series
Linnaeus University Dissertations ; 45/2011
Keywords
multi-storey structures, timber engineering, wind stabilization, shear walls, cross-laminated timber wall panels, fasteners, sheathing-to-framing connections
National Category
Building Technologies
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
urn:nbn:se:lnu:diva-11489 (URN)978-91-86491-73-4 (ISBN)
Public defence
2011-05-06, M1083, Hus M, Lückligs Plats 1, Växjö, 10:00 (English)
Opponent
Supervisors
Available from: 2011-05-02 Created: 2011-04-28 Last updated: 2019-10-17Bibliographically approved

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Vessby, JohanSerrano, ErikEnquist, Bertil

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