Structural Engineering and Fire Dynamics: Advances at the Interface and Buchanan's Challenge

Law, Angus, Stern-Gottfried, Jamie, Gillie, Martin and Rein, Guillermo (2011). Structural Engineering and Fire Dynamics: Advances at the Interface and Buchanan's Challenge. In: Fire Safety Science: Proceedings of the 10th International Symposium. 10th International Symposium of Fire Safety Science, Maryland, USA, (1563-1573). 19-24 June. doi:10.3801/IAFSS.FSS.10-1563


Author Law, Angus
Stern-Gottfried, Jamie
Gillie, Martin
Rein, Guillermo
Title of paper Structural Engineering and Fire Dynamics: Advances at the Interface and Buchanan's Challenge
Conference name 10th International Symposium of Fire Safety Science
Conference location Maryland, USA
Conference dates 19-24 June
Proceedings title Fire Safety Science: Proceedings of the 10th International Symposium
Place of Publication Oxford, United Kingdom
Publisher IAFSS
Publication Year 2011
Sub-type Fully published paper
DOI 10.3801/IAFSS.FSS.10-1563
Start page 1563
End page 1573
Total pages 11
Language eng
Formatted Abstract/Summary
At most fire scenes, electric short circuit (ESC) arc beads that may be provide useful information on the cause and development of the fire are found. Various physical or chemical methods have been proposed for identifying these electric short circuit beads to be either the cause of a fire (primary arc beads) or one caused by the flames of the fire (secondary arc beads). Little was studied, however, on their identification using the different distribution of O and C in the molten marks. In this study, the concentration of O and C in the surface region and subsurface was quantified by X-ray photoelectron spectroscopy (XPS). Corresponding to the sputtering depth, the molten product on a primary ESC arc bead may be distinguished as three portions: surface layer with drastic decrease of carbon content; intermediate layer with gentle change of oxygen content, gradually diminished carbon peak, and consisted of Cu2O; transition layer without Cu2O and with rapid decrease of oxygen content. While the molten product on a secondary ESC are bead may be distinguished as two portions: surface layer with carbon content decreasing quickly; subsurface layer without Cu2O and with carbon, oxygen content decreasing gradually. Thus, it can be seen that there was an obvious interface between the layered surface product and the substrate for the first type of bead, while as to the second type of bead there was no interface. As a result, the quantitative results can be used to identify these electric short circuit beads to be either the cause of a fire (a primary ESC) or one caused by the flames of the fire (a secondary ESC), as complementary technique for judgments of fire cause.
Keyword Travelling fires
Finite element analysis
Reinforced concrete
Structural utilization
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Conference Paper
Collection: School of Civil Engineering Publications
 
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Created: Mon, 24 Aug 2015, 11:02:15 EST by Jeannette Watson on behalf of School of Civil Engineering