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Steel and Composite Structures
  Volume 8, Number 3, June 2008 , pages 243-264
DOI: https://doi.org/10.12989/scs.2008.8.3.243
 


Experimental investigation of the behaviour of a steel sub-frame under a natural fire
Aldina Santiago, Luis Simoes da Silva, Gilberto Vaz, Paulo Vila Real and Antonio Gameiro Lopes

 
Abstract
    This paper details a testing facility (?NATURAL FIRE FACILITY?) that allows closelycontrolled experimental testing on full-scale sub-frames while reproducing the spatially transient temperature conditions measured in real fires. Using this test facility, an experimental investigation of six steel sub-frames under a natural fire was carried out at the Department of Civil Engineering of the University of Coimbra. The main objective of these tests was to provide insight into the influence of these connection types on the behaviour of steel sub-structures under fire. The experimental layout is defined by two thermally insulated HEA300 columns and an unprotected IPE300 beam with 5.7 m span,supporting a composite concrete slab. Beam-to-column connections are representative of the most common joint type used on buildings: welded joints and extended, flush and partial depth plate. Finally, the available results are presented and discussed: evolution of the steel temperature; development of displacements and local deformations and failure modes on the joints zone.
 
Key Words
    structural engineering; steel and composite structures; fire behaviour; full-scale tests; structural integrity
 
Address
Aldina Santiago, Luis Simoes da Silva : ISISE - Department of Civil Engineering, University of Coimbra, Coimbra, Portugal
Gilberto Vaz : Department of Mechanical Engineering, ISEC - Polytechnic Institute of Coimbra, Coimbra, Portugal
Paulo Vila Real : LABEST - Department of Civil Engineering, University of Aveiro, Aveiro, Portugal
Antonio Gameiro Lopes : Department of Mechanical Engineering, University of Coimbra, Coimbra, Portugal
 

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