Random Parameters and Sources of Uncertainty in Practical Fire Safety Assessment of Steel Building Structures

Paweł Artur Król

Abstract

The purpose of this article is to identify sources of uncertainty and outline the basis of probabilistic safety assessment of steel structures exposed to fire conditions. Awareness of the existence of unavoidable uncertainties and non-deterministic nature of many phenomena and parameters may be essential for a proper understanding of the issues of structural reliability in the event of extreme or accidental actions.The study highlights various sources of uncertainty associated with practical fire safety assessment of steel structures which significantly affects the reliability of estimates. Universal factors influencing random structural resistance in all design conditions were separately described. A significant part of the paper is devoted to issues that relate only to an accidental design situation of fire. Reference was made to the uncertainty of the analytical model describing the bearing capacity of the structure in terms of probabilistic approach. A synthetic summary on the impact of the method of carrying out material testing in elevated temperatures on the strength parameters,was made. In the conclusion it has been underlined that, interalia, due to the lack of relevant statistical data, conducting a fully reliable probabilistic analysis of random structural resistance under fire is currently not possible. A unique part of the paper contains the proposed model of probability-based analytical approach to assess random structural resistance in fire conditions, incorporating an authorial modification to models used for standard conditions.
Author Paweł Artur Król IIB
Paweł Artur Król,,
- The Institute of Civil Engineering
Journal seriesPeriodica Polytechnica-Civil Engineering, ISSN 0553-6626
Issue year2016
Vol60
No4
Pages1-14
Publication size in sheets0.65
Keywords in Englishfire safety, structural element, steel structure, uncertainty, reliability, probability-based analytical approach
DOIDOI:10.3311/PPci.9833
Languageen angielski
File
Periodica.pdf 933.53 KB
Score (nominal)15
ScoreMinisterial score = 15.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 15.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 0.313 (2) - 2016=0.365 (5)
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