Modelling the hygro-mechanical creep behaviour of FRP reinforced timber elements
O'Ceallaigh, Conan Sikora, Karol McPolin, Daniel Harte, Annette M.
O'Ceallaigh, Conan
Sikora, Karol
McPolin, Daniel
Harte, Annette M.
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Repository DOI
Publication Date
2020-06-20
Type
Article
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Citation
O'Ceallaigh, Conan, Sikora, Karol, McPolin, Daniel, & Harte, Annette M. (2020). Modelling the hygro-mechanical creep behaviour of FRP reinforced timber elements. Construction and Building Materials, 259, DOI:10.1016/j.conbuildmat.2020.119899
Abstract
A fully coupled moisture-displacement finite element model has been developed to predict the viscoelastic, mechano-sorptive and swelling/shrinkage behaviour of FRP reinforced timber elements when stressed under long-term load and simultaneously subjected to changes in relative humidity. A DFLUX subroutine, to describe the changes in relative humidity with time, and a UMAT subroutine, implemented to describe the viscoelastic, mechano-sorptive and swelling/shrinkage behaviour, are presented. Additionally, an irrecoverable mechano-sorptive component is presented. This additional irrecoverable component occurs when the timber moisture content increases to a moisture content above levels previously attained. The model is found to be in agreement with experimentally determined deflection and strain results on both unreinforced and FRP reinforced beams subjected to constant and variable climates.
Publisher
Elsevier
Publisher DOI
10.1016/j.conbuildmat.2020.119899
Rights
Attribution-NonCommercial-NoDerivs 3.0 Ireland