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10.03: Numerical investigation on the fire behaviour of steel beams with local fire protection damages
Author(s) -
Bihina Gisèle,
Zhao Bin
Publication year - 2017
Publication title -
ce/papers
Language(s) - English
Resource type - Journals
ISSN - 2509-7075
DOI - 10.1002/cepa.301
Subject(s) - damages , ceiling (cloud) , fire protection , structural engineering , fire resistance , heat transfer , environmental science , forensic engineering , engineering , materials science , composite material , civil engineering , law , mechanics , physics , political science
The mains results from a numerical investigation on protected steel beams with localized fire protection damages in the Auditorium of Maison de la Radio in Paris are presented. These damages were caused by the implementation of a suspended ceiling fixed to the beams by means of rails, and observed near and at fixation points. In order to check the fire behaviour of these beams, a numerical study coupling a heat transfer analysis and a structural bearing capacity calculation was conducted under Ansys computer code. The partial lack of fire protection was accounted for by considering square holes through the whole sprayed protection thickness in the heat transfer analysis. Critical sizes beyond which the required R90 fire resistance rate is not met were defined, which enables to avoid any costly refurbishment of the sprayed fire protection.