Full-scale fire tests of post-tensioned timber beams

Type of content
Conference Contributions - Published
Publisher's DOI/URI
Thesis discipline
Degree name
University of Canterbury. Civil and Natural Resources Engineering
Journal Title
Journal ISSN
Volume Title
Spellman, P.
Carradine, D.
Abu, A.
Moss, P.
Buchanan, A.

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.

Spellman, 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.
Post Tensioned Timber Construction, Fire Performance, Furnace Test
Ngā upoko tukutuku/Māori subject headings
ANZSRC fields of research
Fields of Research::40 - Engineering::4005 - Civil engineering::400505 - Construction materials
Field of Research::09 - Engineering::0905 - Civil Engineering::090599 - Civil Engineering not elsewhere classified
Fields of Research::40 - Engineering::4016 - Materials engineering::401610 - Timber, pulp and paper