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中南大学学报(英文版)

Journal of Central South University

Vol. 24    No. 4    April 2017

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Fire resistance performance of glulam beam
CHEN Chang-kun(陈长坤), YANG Jian(杨建), CHEN Jie(陈杰), ZENG Jia-wei(曾嘉伟), WANG Wei-yu(王玮玉), ZHAO Xiao-long(赵小龙)

Institute of Disaster Prevention Science and Safety Technology, Central South University, Changsha 410075, China

Abstract:A glulam beam with the size of 4700 mm×300 mm×480 mm (L×W×H) was tested in the furnace to investigate the fire resistance performance of glulam beam according to the temperature curve of ISO834. Three surfaces, the bottom and the two flanks, of the glulam beam were exposed to fire in the test. Simply supported bearings were used to support the beam on which the load of 0.76 kN/m was uniformly set. The experimental results show that: 1) Sectional dimension of glulam beam was greatly diminished due to the serious decomposition and carbonization of the timber. 2) The largest vertical deformation is relatively small and it has not exceeded 3.95 mm until the end of experiment. The maximum temperature on the top surface of the glulam beam attains 180 °C at 3437 s, which indicates that the beam have failed according to the European standard of fire resistance tests. 3) The right end of the beam with 16 connecting holes (the connecting holes were used for the connection between bolt and column) and the slit in the beam both burnt intensely and carbonized seriously because the fire could reach the holes and slit of beam facilitating the burning.

 

Key words: glulam beam; experimental investigation; temperature; fire resistance; carbonization

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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