Mechanical properties of structural steel exposed to passive fire

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Mechanical properties of structural steel exposed to passive fire

Popis výsledku v původním jazyce

Non-seismically designed existing reinforced concrete (RC) structures are susceptible to any thermal effect. Indeed, difficulties arise even more in understanding the performance of buildings in fire due to the inherent complexity in the behavior of composite materials at elevated temperatures. This paper deals with the determination of mechanical properties of hot rolled structural steel under thermal effect. A focus on the influence of the passive fire to the structural steel is thus provided. The specimens were firstly heated up to a certain level of temperature (i.e. in a range of 300-700 oC) and then cooled down to room temperature. After that, the dog-bone shape steel tensile test samples were taken from reinforcing bar of RC bond-slip specimens complying with RILEM test method. Dependence of the heating and cooling rate on mechanical properties of S275 type smooth reinforcing steel was identified by either destructive or non-destructive testing methods. Two different techniques including their pros&amp;cons and difficulties in implementing the tests were therefore closely compared. Moreover, major parameters characterizing the behavior of the steel samples exposed to the aggressive fire were compared with the control ones. It is found that not only the ductility in the fire-exposed specimens was essentially different from the ones at ambient temperature but also the deterioration in yield and ultimate strength was considerably affected.

Název v anglickém jazyce

Mechanical properties of structural steel exposed to passive fire

Popis výsledku anglicky

Non-seismically designed existing reinforced concrete (RC) structures are susceptible to any thermal effect. Indeed, difficulties arise even more in understanding the performance of buildings in fire due to the inherent complexity in the behavior of composite materials at elevated temperatures. This paper deals with the determination of mechanical properties of hot rolled structural steel under thermal effect. A focus on the influence of the passive fire to the structural steel is thus provided. The specimens were firstly heated up to a certain level of temperature (i.e. in a range of 300-700 oC) and then cooled down to room temperature. After that, the dog-bone shape steel tensile test samples were taken from reinforcing bar of RC bond-slip specimens complying with RILEM test method. Dependence of the heating and cooling rate on mechanical properties of S275 type smooth reinforcing steel was identified by either destructive or non-destructive testing methods. Two different techniques including their pros&amp;cons and difficulties in implementing the tests were therefore closely compared. Moreover, major parameters characterizing the behavior of the steel samples exposed to the aggressive fire were compared with the control ones. It is found that not only the ductility in the fire-exposed specimens was essentially different from the ones at ambient temperature but also the deterioration in yield and ultimate strength was considerably affected.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

METAL 2018 : conference proceedings

ISBN

978-80-87294-84-0

ISSN

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e-ISSN

neuvedeno

Počet stran výsledku

6

Strana od-do

622-627

Název nakladatele

TANGER, spol. s r.o.

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

23. 5. 2018

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

000461832200095