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Title: Experimental and finite element analysis of protected composite cellular beams of different span length
Author: Petrou, Klelia
ISNI:       0000 0004 5364 992X
Awarding Body: University of Ulster
Current Institution: Ulster University
Date of Award: 2014
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Cellular beams are widely spread structural elements in the modern construction industry having as main characteristic the web openings. Cellular beams are produced through a fabrication process from solid beams and have bigger section depth than the parent beam. In buildings design with need of open large spaces cellular beams can be used in long span, up to 20 metres, without the necessity of including columns. The most common protection material applied in cellular beams is intumescent coating, giving the advantages of allowing the passage for technical services through the web openings and adding an aesthetic look to the beams. This PhD research investigates the behaviour of short-span and long-span composite protected with intumescent coating cellular beams in fire conditions, performing experimentally and analytical studies. The experimental process performed in FireSERT laboratory, tested under ISO-834 standard fire curve three composite protected with water based intumescent coating for 60 minutes cellular beams with different geometries but same 4.5 metres span. The furnace fire tests showed that the temperature distribution on protected cellular beams in non-uniform and the failure modes are web post buckling and Vierendeel bending. The collected results were compared with other furnace tests, which were previously emulated in the same conditions, although using unprotected beams. These comparative analyses showed that on the protected beams the temperature increase is slower and maximum deflections lower.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available