Post-Fire Susceptibility to Brittle Fracture of Selected Steel Grades Used in Construction Industry—Assessment Based on the Instrumented Impact Test
The change in the value of the breaking energy is discussed here for selected steel grades used in building structures after subjecting the samples made of them to episodes of heating in the steady-state heating regime and then cooling in simulated fire conditions. These changes were recorded based...
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doaj-60edea9d7ad249a6aae2adb94c20957f2021-07-23T13:51:43ZengMDPI AGMaterials1996-19442021-07-01143922392210.3390/ma14143922Post-Fire Susceptibility to Brittle Fracture of Selected Steel Grades Used in Construction Industry—Assessment Based on the Instrumented Impact TestMariusz Maslak0Michal Pazdanowski1Marek Stankiewicz2Paulina Zajdel3Faculty of Civil Engineering, Cracow University of Technology, 31-155 Cracow, PolandFaculty of Civil Engineering, Cracow University of Technology, 31-155 Cracow, PolandFaculty of Civil Engineering, Cracow University of Technology, 31-155 Cracow, PolandFaculty of Civil Engineering, Cracow University of Technology, 31-155 Cracow, PolandThe change in the value of the breaking energy is discussed here for selected steel grades used in building structures after subjecting the samples made of them to episodes of heating in the steady-state heating regime and then cooling in simulated fire conditions. These changes were recorded based on the instrumented Charpy impact tests, in relation to the material initial state. The S355J2+N, 1H18N9T steels and also X2CrNiMoN22-5-3 duplex steel were selected for detailed analysis. The fire conditions were modelled experimentally by heating the samples and then keeping them for a specified time at a constant temperature of: 600 °C (first series) and 800 °C (second series), respectively. Two alternative cooling variants were investigated in the experiment: slow cooling of the samples in the furnace, simulating the natural fire progress, without any external extinguishing action and cooling in water mist simulating an extinguishing action by a fire brigade. The temperature of the tested samples was set at the level of −20 °C and alternatively at the level of +20 °C. The conducted analysis is aimed at assessing the risk of sudden, catastrophic fracture of load-bearing structure made of steel degraded as a result of a fire that occurred previously with different development scenarios.https://www.mdpi.com/1996-1944/14/14/3922firestructural steelsteady-state heating regimeimpact testbreaking energy |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mariusz Maslak Michal Pazdanowski Marek Stankiewicz Paulina Zajdel |
spellingShingle |
Mariusz Maslak Michal Pazdanowski Marek Stankiewicz Paulina Zajdel Post-Fire Susceptibility to Brittle Fracture of Selected Steel Grades Used in Construction Industry—Assessment Based on the Instrumented Impact Test Materials fire structural steel steady-state heating regime impact test breaking energy |
author_facet |
Mariusz Maslak Michal Pazdanowski Marek Stankiewicz Paulina Zajdel |
author_sort |
Mariusz Maslak |
title |
Post-Fire Susceptibility to Brittle Fracture of Selected Steel Grades Used in Construction Industry—Assessment Based on the Instrumented Impact Test |
title_short |
Post-Fire Susceptibility to Brittle Fracture of Selected Steel Grades Used in Construction Industry—Assessment Based on the Instrumented Impact Test |
title_full |
Post-Fire Susceptibility to Brittle Fracture of Selected Steel Grades Used in Construction Industry—Assessment Based on the Instrumented Impact Test |
title_fullStr |
Post-Fire Susceptibility to Brittle Fracture of Selected Steel Grades Used in Construction Industry—Assessment Based on the Instrumented Impact Test |
title_full_unstemmed |
Post-Fire Susceptibility to Brittle Fracture of Selected Steel Grades Used in Construction Industry—Assessment Based on the Instrumented Impact Test |
title_sort |
post-fire susceptibility to brittle fracture of selected steel grades used in construction industry—assessment based on the instrumented impact test |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2021-07-01 |
description |
The change in the value of the breaking energy is discussed here for selected steel grades used in building structures after subjecting the samples made of them to episodes of heating in the steady-state heating regime and then cooling in simulated fire conditions. These changes were recorded based on the instrumented Charpy impact tests, in relation to the material initial state. The S355J2+N, 1H18N9T steels and also X2CrNiMoN22-5-3 duplex steel were selected for detailed analysis. The fire conditions were modelled experimentally by heating the samples and then keeping them for a specified time at a constant temperature of: 600 °C (first series) and 800 °C (second series), respectively. Two alternative cooling variants were investigated in the experiment: slow cooling of the samples in the furnace, simulating the natural fire progress, without any external extinguishing action and cooling in water mist simulating an extinguishing action by a fire brigade. The temperature of the tested samples was set at the level of −20 °C and alternatively at the level of +20 °C. The conducted analysis is aimed at assessing the risk of sudden, catastrophic fracture of load-bearing structure made of steel degraded as a result of a fire that occurred previously with different development scenarios. |
topic |
fire structural steel steady-state heating regime impact test breaking energy |
url |
https://www.mdpi.com/1996-1944/14/14/3922 |
work_keys_str_mv |
AT mariuszmaslak postfiresusceptibilitytobrittlefractureofselectedsteelgradesusedinconstructionindustryassessmentbasedontheinstrumentedimpacttest AT michalpazdanowski postfiresusceptibilitytobrittlefractureofselectedsteelgradesusedinconstructionindustryassessmentbasedontheinstrumentedimpacttest AT marekstankiewicz postfiresusceptibilitytobrittlefractureofselectedsteelgradesusedinconstructionindustryassessmentbasedontheinstrumentedimpacttest AT paulinazajdel postfiresusceptibilitytobrittlefractureofselectedsteelgradesusedinconstructionindustryassessmentbasedontheinstrumentedimpacttest |
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