Naslov
Development of a high temperature material model for grade s275jr steel

Autori
Torić, Neno ; Brnić, Josip ; Boko, Ivica ; Brčić, Marino ; Burgess, Ian W. ; Uzelac Glavinić, Ivana

Izvornik
Journal of constructional steel research (0143-974X) 137 (2017); 161-168

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Steel ; fire ; coupon testing ; mechanical properties ; creep

Sažetak
The paper presents test results for the mechanical and creep properties of the European steel grade S275JR at high temperatures. The objective of the research was to obtain a reliable estimate of creep strain development in the temperature range 400-600°C, and to identify the critical thermo- mechanical parameters which activate the creep mechanism. Tests of mechanical properties at temperature levels up to 600°C have shown good agreement with the reduction factors for yield strength and modulus of elasticity given in Eurocode 3 and other comparable studies. A critical temperature for creep development of approximately 400°C was identified in the tests. The creep tests conducted have also shown that the creep strain rate starts to develop significantly at temperatures around 500°C when coupons are exposed to a mid-range stress level equal to 60% of the stress at 0.2% strain. The temperature level of 600°C is identified as the upper-bound temperature for creep development, since creep develops very rapidly, even at very low stress levels. Finally, the paper presents an analytical creep model suitable for implementation in Finite Element-based numerical models.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

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