ǂA ǂnew numerical model for analysing timber-concrete composite beams under fire conditions

Robert Pečenko (Author), Tomaž Hozjan (Author), Sabina Huč (Author)

Abstract

This article presents a new numerical model for the analysis of timber-concrete composite beam exposed to fire. The model is based on a detailed mathematical and physical description of the problem. It accounts for the exact geometrical and material non-linear behaviour of each layer and incorporates a flexible connection between the layers, which is temperature dependent. The numerical model has been validated against experimental results from literature and proven to be accurate. In addition, the numerical formulation has been found to be reliable and computationally efficient. Further parametric studies revealed significant impact of modelling flexible and temperature dependent connection between concrete and timber on the mechanical response of the beam.

Keywords

timber-concrete composite;fire;numerical modelling;thermo-mechanical analysis;slip;

Data

Language:	English
Year of publishing:	2025
Typology:	1.01 - Original Scientific Article
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
UDC:	691:519.62:531
COBISS:	231909123
ISSN:	2352-0124
Views:	105
Downloads:	35
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary abstract:	Ta članek predstavlja nov numerični model za analizo lesno-betonskega kompozitnega nosilca, izpostavljenega požaru. Model temelji na podrobnem matematičnem in fizikalnem opisu problema. Upošteva natančno geometrijsko in materialno nelinearno obnašanje vsake plasti ter vključuje možnost zdrsa med plastmi, ki je odvisna od temperature. Numerični model je bil potrjen z eksperimentalnimi rezultati iz literature in se je izkazal za natančnega. Poleg tega se je numerična formulacija izkazala za zanesljivo in računsko učinkovito. Nadaljnje parametrične študije so pokazale pomemben vpliv modeliranja fleksibilne in temperaturno odvisne povezave med betonom in lesom na mehanski odziv nosilca.
Secondary keywords:	lesno-betonski kompoziti;požar;numerično modeliranje;termo-mehanska analiza;zdrs;
Type (COBISS):	Article
Pages:	8 str.
Issue:	ǂVol. ǂ75, [article no.] 108575
Chronology:	May 2025
DOI:	10.1016/j.istruc.2025.108575
ID:	26192766