Finite Element Modelling of Post-Tensioned Timber Beams under Fire Conditions (2018)
In order to implement innovative timber structures globally, performance-based design using numerical models are often required. A model was developed to simulate post-tensioned (PT) timber beams in FEM software ABAQUS and compared to three furnace beam experiments. A sequentially coupled heat transfer – mechanical analysis was developed and validated. The timber was treated as orthotropic both in elasticity and plasticity, and was modelled with temperature-dependent properties. The simulation results showed good agreement with both the thermal results and the mechanical analysis. The thermal results matched the thermocouple readings well and the char depths were predicted to within 4 mm. The failure modes and times were accurately predicted (within 5% accuracy), and the deflection behaviour was reasonably predicted compared to the experimental data.
ANZSRC Fields of Research40 - Engineering::4005 - Civil engineering::400505 - Construction materials
40 - Engineering::4016 - Materials engineering::401610 - Timber, pulp and paper
40 - Engineering::4005 - Civil engineering::400510 - Structural engineering
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Spellman, P.; Carradine, D.; Abu, A.; Moss, P.; Buchanan, A. (University of Canterbury. Civil and Natural Resources Engineering, 2012)This paper describes a series of full-scale furnace tests on loaded post tensioned LVL beams. Each beam was designed to exhibit a specific failure mechanism when exposed to the standard ISO834 fire. In addition to the beams ...
Spellman, P.M.; Abu, A.K.; Carradine, D.M.; Moss, P.J.; Buchanan, A.H. (University of Canterbury. Civil and Natural Resources Engineering, 2012)This paper describes a series of three full-scale furnace tests on post-tensioned LVL box beams loaded with vertical loads, and presents a proposed fire design method for post-tensioned timber members. The design method ...
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