Full-scale fire tests of post-tensioned timber beams (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 a number of steel anchorage protection schemes were also investigated. These included wrapping the ends in kaowool, using intumescent paint, covering the anchorage with fire rated plasterboard and covering the anchorage with timber (LVL). The results of the full-scale tests cover temperature distributions through the timber members during the tests, the temperatures reached within the cavity and those of the tendons suspended within the cavity, the relaxation of the tendons during the test, the failure mechanisms experienced, and a summary of the anchorage protection details and their effectiveness. Recommendations for the design of both post-tensioned timber beams and associated anchorages are also provided.
CitationSpellman, P., Carradine, D., Abu, A., Moss, P., Buchanan, A. (2012) Full-scale fire tests of post-tensioned timber beams. Auckland, New Zealand: World Conference on Timber Engineering (WCTE), 16-19 Jul 2012. Strength and Serviceability: Extreme Events, 227-236.
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KeywordsPost Tensioned Timber Construction; Fire Performance; Furnace Test
ANZSRC Fields of Research40 - Engineering::4005 - Civil engineering::400505 - Construction materials
09 - Engineering::0905 - Civil Engineering::090599 - Civil Engineering not elsewhere classified
40 - Engineering::4016 - Materials engineering::401610 - Timber, pulp and paper
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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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