Mechanical properties of spruce wood extracted from glt beams loaded by fire

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F21%3A00351533" target="_blank" >RIV/68407700:21110/21:00351533 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.3390/su13105494" target="_blank" >https://doi.org/10.3390/su13105494</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/su13105494" target="_blank" >10.3390/su13105494</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Mechanical properties of spruce wood extracted from glt beams loaded by fire

Popis výsledku v původním jazyce

Heating wood to high temperature changes either temporarily or permanently its physical properties. This issue is addressed in the present contribution by examining the effect of high temperature on residual mechanical properties of spruce wood, grounding on the results of full-scale fire tests performed on GLT beams. Given these tests, a computational model was developed to provide through-thickness temperature profiles allowing for the estimation of a charring depth on the one hand and on the other hand assigning a particular temperature to each specimen used subsequently in small-scale tensile tests. The measured Young's moduli and tensile strengths were accompanied by the results from three-point bending test carried out on two groups of beams exposed to fire of a variable duration and differing in the width of the cross-section, b=100 mm (Group 1) and b=160 mm (Group 2). As expected, increasing the fire duration and reducing the initial beam cross-section reduces the residual bending strength. A negative impact of high temperature on residual strength has also been observed from simple tensile tests, although limited to a very narrow layer adjacent to the charring front not even exceeding a typically adopted value of the zero-strength layer d(0)=7 mm. On the contrary, the impact on stiffness is relatively mild supporting the thermal recovery property of wood.

Název v anglickém jazyce

Mechanical properties of spruce wood extracted from glt beams loaded by fire

Popis výsledku anglicky

Heating wood to high temperature changes either temporarily or permanently its physical properties. This issue is addressed in the present contribution by examining the effect of high temperature on residual mechanical properties of spruce wood, grounding on the results of full-scale fire tests performed on GLT beams. Given these tests, a computational model was developed to provide through-thickness temperature profiles allowing for the estimation of a charring depth on the one hand and on the other hand assigning a particular temperature to each specimen used subsequently in small-scale tensile tests. The measured Young's moduli and tensile strengths were accompanied by the results from three-point bending test carried out on two groups of beams exposed to fire of a variable duration and differing in the width of the cross-section, b=100 mm (Group 1) and b=160 mm (Group 2). As expected, increasing the fire duration and reducing the initial beam cross-section reduces the residual bending strength. A negative impact of high temperature on residual strength has also been observed from simple tensile tests, although limited to a very narrow layer adjacent to the charring front not even exceeding a typically adopted value of the zero-strength layer d(0)=7 mm. On the contrary, the impact on stiffness is relatively mild supporting the thermal recovery property of wood.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA18-05791S" target="_blank" >GA18-05791S: Požární odolnost lepených lamelových dřevěných nosníků se zahrnutím nejistot</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

SUSTAINABILITY

ISSN

2071-1050

e-ISSN

2071-1050

Svazek periodika

13

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

19

Strana od-do

—

Kód UT WoS článku

000662629100001

EID výsledku v databázi Scopus

2-s2.0-85106320508