Fire resistance of unprotected Ultra Shallow Floor Beams (USFB): A numerical investigation

C Maraveas, K. D Tsavdaridis, Ali Nadjai

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This paper presents the fire resistance behaviour of the Ultra Shallow Floor Beams (USFB) partially encased in concrete using numerical analysis method based on material specifications of the EN1994-1-2. Investigating the behavior of USFBs under elevated temperatures is crucial in determining their fire resistance and evaluating their overall performance in contemporary construction. Even though the manufacturing company provides fire resistances for USFBs based on EC4-1-2 procedures, their response to elevated temperature effects remains up to date neither well documented nor clearly understood. The analyses involved two different beams of span 5m and 8m respectively, as specified by the manufacturer. Analysis results showed that such beams, when
unprotected, experience severe temperature gradients if exposed to fire, as the lower flange still remains unprotected in contrast to the concrete encased part of the crosssection. As it was anticipated, the moment capacity governs the fire resistance of the beams and the load factor highly effects the elevated temperature behavior. In addition, the loss of the lower flange, which develops high temperatures, is not compensated by the web and consequently the moment capacity ultimately depends on the temperature of the lower flange. Results also suggest that simulated beams sustained the applied load for
approximately 40min of exposure to the standard fire.
LanguageEnglish
Pages609-627
Number of pages23
JournalFire Technology
Volume53
Issue number2
Early online date23 Mar 2016
DOIs
Publication statusPublished - Mar 2017

Fingerprint

Fire resistance
Flanges
Fires
Concretes
Temperature
Thermal effects
Thermal gradients
Numerical analysis
Specifications
Industry

Keywords

  • Ultra Shallow Floor Beams
  • Fire Resistance
  • Composite
  • Flooring
  • Systems
  • Moment Capacity
  • Shear Capacity

Cite this

@article{19f4bf3997a64e62b67aa8ed1421cffc,
title = "Fire resistance of unprotected Ultra Shallow Floor Beams (USFB): A numerical investigation",
abstract = "This paper presents the fire resistance behaviour of the Ultra Shallow Floor Beams (USFB) partially encased in concrete using numerical analysis method based on material specifications of the EN1994-1-2. Investigating the behavior of USFBs under elevated temperatures is crucial in determining their fire resistance and evaluating their overall performance in contemporary construction. Even though the manufacturing company provides fire resistances for USFBs based on EC4-1-2 procedures, their response to elevated temperature effects remains up to date neither well documented nor clearly understood. The analyses involved two different beams of span 5m and 8m respectively, as specified by the manufacturer. Analysis results showed that such beams, whenunprotected, experience severe temperature gradients if exposed to fire, as the lower flange still remains unprotected in contrast to the concrete encased part of the crosssection. As it was anticipated, the moment capacity governs the fire resistance of the beams and the load factor highly effects the elevated temperature behavior. In addition, the loss of the lower flange, which develops high temperatures, is not compensated by the web and consequently the moment capacity ultimately depends on the temperature of the lower flange. Results also suggest that simulated beams sustained the applied load forapproximately 40min of exposure to the standard fire.",
keywords = "Ultra Shallow Floor Beams, Fire Resistance, Composite, Flooring, Systems, Moment Capacity, Shear Capacity",
author = "C Maraveas and Tsavdaridis, {K. D} and Ali Nadjai",
year = "2017",
month = "3",
doi = "10.1007/s10694-015-0547-1",
language = "English",
volume = "53",
pages = "609--627",
journal = "Fire Technology",
issn = "0015-2684",
number = "2",

}

Fire resistance of unprotected Ultra Shallow Floor Beams (USFB): A numerical investigation. / Maraveas, C; Tsavdaridis, K. D; Nadjai, Ali.

In: Fire Technology, Vol. 53, No. 2, 03.2017, p. 609-627.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Fire resistance of unprotected Ultra Shallow Floor Beams (USFB): A numerical investigation

AU - Maraveas, C

AU - Tsavdaridis, K. D

AU - Nadjai, Ali

PY - 2017/3

Y1 - 2017/3

N2 - This paper presents the fire resistance behaviour of the Ultra Shallow Floor Beams (USFB) partially encased in concrete using numerical analysis method based on material specifications of the EN1994-1-2. Investigating the behavior of USFBs under elevated temperatures is crucial in determining their fire resistance and evaluating their overall performance in contemporary construction. Even though the manufacturing company provides fire resistances for USFBs based on EC4-1-2 procedures, their response to elevated temperature effects remains up to date neither well documented nor clearly understood. The analyses involved two different beams of span 5m and 8m respectively, as specified by the manufacturer. Analysis results showed that such beams, whenunprotected, experience severe temperature gradients if exposed to fire, as the lower flange still remains unprotected in contrast to the concrete encased part of the crosssection. As it was anticipated, the moment capacity governs the fire resistance of the beams and the load factor highly effects the elevated temperature behavior. In addition, the loss of the lower flange, which develops high temperatures, is not compensated by the web and consequently the moment capacity ultimately depends on the temperature of the lower flange. Results also suggest that simulated beams sustained the applied load forapproximately 40min of exposure to the standard fire.

AB - This paper presents the fire resistance behaviour of the Ultra Shallow Floor Beams (USFB) partially encased in concrete using numerical analysis method based on material specifications of the EN1994-1-2. Investigating the behavior of USFBs under elevated temperatures is crucial in determining their fire resistance and evaluating their overall performance in contemporary construction. Even though the manufacturing company provides fire resistances for USFBs based on EC4-1-2 procedures, their response to elevated temperature effects remains up to date neither well documented nor clearly understood. The analyses involved two different beams of span 5m and 8m respectively, as specified by the manufacturer. Analysis results showed that such beams, whenunprotected, experience severe temperature gradients if exposed to fire, as the lower flange still remains unprotected in contrast to the concrete encased part of the crosssection. As it was anticipated, the moment capacity governs the fire resistance of the beams and the load factor highly effects the elevated temperature behavior. In addition, the loss of the lower flange, which develops high temperatures, is not compensated by the web and consequently the moment capacity ultimately depends on the temperature of the lower flange. Results also suggest that simulated beams sustained the applied load forapproximately 40min of exposure to the standard fire.

KW - Ultra Shallow Floor Beams

KW - Fire Resistance

KW - Composite

KW - Flooring

KW - Systems

KW - Moment Capacity

KW - Shear Capacity

U2 - 10.1007/s10694-015-0547-1

DO - 10.1007/s10694-015-0547-1

M3 - Article

VL - 53

SP - 609

EP - 627

JO - Fire Technology

T2 - Fire Technology

JF - Fire Technology

SN - 0015-2684

IS - 2

ER -