Peer-Reviewed Journal Details
Mandatory Fields
O'Ceallaigh, C., Sikora, K., McPolin, D., Harte, A.M.
Construction and Building Materials
Modelling the Hygro-Mechanical Creep Behaviour of FRP Reinforced Timber Elements
Optional Fields
Basalt fibre, DFLUX, Finite element analysis, Mechano-sorptive creep, Reinforced timber, Sitka spruce, Swelling/shrinkage, Variable climate, Viscoelastic creep, UMAT
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.
Grant Details
Other Government
DAFM Research Grant 11/C/207
Publication Themes
Biomedical Science and Engineering, Environment, Marine and Energy, Informatics, Physical and Computational Sciences