A comparison between prescriptive- and performance-based approaches in fire safety design of structures

Iwona Budny, Luisa Giuliani

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Abstract

A provision of an adequate consideration of both the people and structure safety is a crucial goal in a rational fire design. However, only a partial agreement concerning the general structural fire safety approach exists, and several meaningful discrepancies concerning the design and verification methods can be found in the context of European regulations. Due to counterpoising effects of those aspects, it is not possible to a-priori evaluate which approach leads to the safest or the most economical design. A detailed study of the different aspects and a comparison of the resulting designs is therefore of interest. Furthermore, the method based on prescriptive procedures is not free of design limitations and does not provide detailed information about the structure’s performance under high temperature, which is often crucial if a disproportionate collapse must be avoided. The more advanced approach of performance-based fire design (PBFD) becomes therefore more and more popular. A higher design flexibility based on performance objectives constitutes a beneficial and competitive concept within the structural fire safety engineering, ensuring a higher safety level of a design choice. The aim of this paper is to present the diversity in fundamentals, procedures and solutions of the two foregoing approaches. The aim is primarily accomplished through the detailed case-study analysis of an open car-park in compliance with the European and Scandinavian prescriptive regulations. Furthermore, the advanced methodology of the performance-based fire design approach is considered, with the avail of computer-aided simulations of the main frame of the car-park. Nonlinear analyses, with respect to thermally induced effects and emphasis laid to the collapse modality, are carried out on a frame of the considered structure with the avail of a commercial finite-element code.
Original languageEnglish
Title of host publicationElectronic proceedings - Handlig Exception (HE10) : Structural Systems, Accidental Scenarios, Design Complexity
EditorsFranco Bontempi
Place of Publicationhttp://www.francobontempi.org/handling_papers_10.php
Publisherfrancobontempi.org
Editionelectronic
Publication statusE-pub ahead of print - 2010
EventHandlig Exception : Structural Systems, Accidental Scenarios, Design Complexity - Rome, Italy
Duration: 1 Jan 2010 → …
Conference number: 2nd

Conference

ConferenceHandlig Exception : Structural Systems, Accidental Scenarios, Design Complexity
Number2nd
CityRome, Italy
Period01/01/2010 → …

Keywords

  • fire safety, structural integrity, prescriptive and performance-based fire design, steel car park under fire, thermo-plastic material, transient nonlinear analysis, modeling of fire effect.

Cite this

Budny, I., & Giuliani, L. (2010). A comparison between prescriptive- and performance-based approaches in fire safety design of structures. In F. Bontempi (Ed.), Electronic proceedings - Handlig Exception (HE10): Structural Systems, Accidental Scenarios, Design Complexity (electronic ed.). francobontempi.org. http://www.francobontempi.org/handling_en.php