Publication detail

Full-scale fire resistance tests of lightweight steel framed floor systems

HORÁČEK, M. GERNAY, T. KARMAZÍNOVÁ, M. HLADÍK, M. POFFEL, Z. PEŠEK, O. BALÁZS, I.

Original Title

Full-scale fire resistance tests of lightweight steel framed floor systems

Type

journal article in Web of Science

Language

English

Original Abstract

As cold-formed steel profiles are increasingly used for load-bearing structural systems, their fire design requires specific attention due to their thin-walled nature and high slenderness. In some specific applications such as in storage hall floor systems, these structures are used without sheathing or thermal protection on the fire-exposed side. Yet, there is a lack of data from fire resistance tests on full-scale load-bearing thin-walled steel structures, especially with directly exposed steel. This article describes two standard fire resistance tests on full-scale light gauge steel frame floors made of cold-formed steel lipped channel girders and joists topped by chipboard panels. The experimental program was designed to investigate the fire resistance of the unprotected girders. A specificity of this program was that the girders were subjected to a low load level to probe the ability to achieve without passive fire protection a 30-min fire resistance rating typical for storage hall structures in the Czech Republic. The absence of protection resulted in differences in thermal gradients and bracing compared to common fire tests, as well as a very low degree of utilization leading to an expected failure temperature higher than 800 degrees C. The results showed that the two floors remained stable during the 30 min with limited deflections, but failed the deflection rate criteria after 24 and 22 min, respectively. Comparison is provided with the calculation methods from the Eurocodes. The presented results provide new data on the response of full-scale, unprotected coldformed steel floor systems subjected to fire, which can be used to calibrate numerical models and fire design methods outside of the range currently covered by the codes.

Keywords

Cold-formed steel section; Full-scale test; Fire resistance; Lipped channel beam; LSF floor systems

Authors

HORÁČEK, M.; GERNAY, T.; KARMAZÍNOVÁ, M.; HLADÍK, M.; POFFEL, Z.; PEŠEK, O.; BALÁZS, I.

Released

6. 9. 2023

Publisher

ELSEVIER SCI LTD

Location

OXFORD

ISBN

1879-3223

Periodical

THIN-WALLED STRUCTURES

Year of study

192

Number

11

State

United Kingdom of Great Britain and Northern Ireland

Pages count

19

URL

https://www.sciencedirect.com/science/article/pii/S0263823123005955

Full text in the Digital Library

http://hdl.handle.net/11012/214448

BibTex

@article{BUT184590,
  author="Martin {Horáček} and Thomas {Gernay} and Marcela {Karmazínová} and Marek {Hladík} and Zbyněk {Poffel} and Ondřej {Pešek} and Ivan {Balázs}",
  title="Full-scale fire resistance tests of lightweight steel framed floor systems",
  journal="THIN-WALLED STRUCTURES",
  year="2023",
  volume="192",
  number="11",
  pages="19",
  doi="10.1016/j.tws.2023.111117",
  issn="1879-3223",
  url="https://www.sciencedirect.com/science/article/pii/S0263823123005955"
}