Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ultimate Strength and Its Application to Post-Earthquake Fire Resistance of Steel Frames in Fire
Abstract Predicted ultimate temperatures of steel frames in fire are derived based on the plastic nature of frames of stress redistribution and redundancy, which is applicable to practical fire resistance design. The primary ultimate temperatures of portal as well as multi-story frames are determined with simple calculation. Comparing these with refined numerical solutions verifies applicability of the method of prediction to practice. With this method and numerical verification, theoretical buckling temperatures are found to be also useful in practice for heated columns. As an application of this prediction, post-earthquake fire resistance of steel frames is clarified in terms of ultimate temperature of pre-drifted frames, which is as high as the ultimate temperature intact frames show, if fire is limited within not so enlarged space on the floor. Thermal post-earthquake resistance of two-ply gypsum board wall is also studied based on loading and subsequent heating tests. Although the present prescription for dry walls is found insufficient to make pre-damaged walls fire resistant if damage is not slight, an easy and practical improved construction is also shown to keep damaged walls from premature failure in fire.
Ultimate Strength and Its Application to Post-Earthquake Fire Resistance of Steel Frames in Fire
Abstract Predicted ultimate temperatures of steel frames in fire are derived based on the plastic nature of frames of stress redistribution and redundancy, which is applicable to practical fire resistance design. The primary ultimate temperatures of portal as well as multi-story frames are determined with simple calculation. Comparing these with refined numerical solutions verifies applicability of the method of prediction to practice. With this method and numerical verification, theoretical buckling temperatures are found to be also useful in practice for heated columns. As an application of this prediction, post-earthquake fire resistance of steel frames is clarified in terms of ultimate temperature of pre-drifted frames, which is as high as the ultimate temperature intact frames show, if fire is limited within not so enlarged space on the floor. Thermal post-earthquake resistance of two-ply gypsum board wall is also studied based on loading and subsequent heating tests. Although the present prescription for dry walls is found insufficient to make pre-damaged walls fire resistant if damage is not slight, an easy and practical improved construction is also shown to keep damaged walls from premature failure in fire.
Ultimate Strength and Its Application to Post-Earthquake Fire Resistance of Steel Frames in Fire
Suzuki, Hiroyuki (Autor:in)
Fire Science and Technology 2015 ; 17-30
05.10.2016
14 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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