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dc.contributor.authorO’Ceallaigh, Conan
dc.contributor.authorSikora, Karol
dc.contributor.authorMcPolin, Daniel
dc.contributor.authorHarte, Annette M.
dc.identifier.citationO’Ceallaigh, Conan , Sikora, Karol, McPolin, Daniel, & Harte, Annette M. (2016). Viscoelastic creep of FRP reinforced glulam. Paper presented at the Civil Engineering Research in Ireland 2016 (CERI2016), NUI Galway, 29-30 August, doi:10.13025/S8T333en_IE
dc.description.abstractThe reinforcement of timber using fibre reinforced polymer (FRP) rods or plates is widely accepted as an effective method of increasing the strength and stiffness of members, while at the same time reducing the variability in properties. The short-term behaviour of these reinforced members is relatively well understood, however, the long-term or creep behaviour of such members has received less attention. The objectives of the present work are to determine the durability of reinforced timber beams under sustained loading and constant climate conditions. Timber is a viscoelastic material so its deformation response is a combination of both elastic and viscous components. This viscous creep component is defined as a deformation with time at constant stress and at constant environmental conditions. Sitka spruce is the most widely grown specie in Ireland and is the focus of this study. Glued Laminated (Glulam) beams were manufactured from Sitka spruce and a selected portion of them were reinforced with basalt-fibre reinforced polymer (BFRP) rods. The short-term flexural testing of these beams in their unreinforced and reinforced state demonstrated a significant increase in stiffness with a modest percentage reinforcement ratio. The long-term flexural testing required the design of a creep test frame to implement a constant stress of 8 MPa in the compression zone of an equal proportion of unreinforced and reinforced. The longterm strain and deflection results for the first 52 weeks of testing are presented. The reinforcement was found to have an insignificant impact on the creep deflection but the maximum tensile creep strain was significantly reduced.en_IE
dc.description.sponsorshipThis work has been carried out as part of the project entitled ‘Innovation in Irish timber Usage’ (project ref. 11/C/207) funded by the Department of Agriculture, Food and the Marine of the Republic of Ireland under the FIRM/RSF/COFORD scheme. The authors would also like to thank ECC Ltd. (Earrai Coillte Chonnacht Teoranta) for supplying all the timber used in this project.en_IE
dc.publisherNUI Galwayen_IE
dc.relation.ispartofCivil Engineering Research in Ireland CERI 2016en
dc.subjectIrish Grown Sitka Spruceen_IE
dc.subjectReinforced Timberen_IE
dc.subjectViscoelastic Creepen_IE
dc.titleViscoelastic creep of FRP reinforced glulamen_IE
dc.typeConference Paperen_IE
dc.contributor.funderDepartment of Agriculture, Food and the Marine, Irelanden_IE
dc.local.contactAnnette M. Harte, Dept. Of Civil Engineering, Civil Engineering Building, Nui Galway. 2732 Email:

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