Samad, Hadi El;
Cashell, Katherine A;
Lapira, Luke;
(2025)
Experimental and numerical assessment of H500 austenitic stainless steel in steel-framed structures after fire exposure.
Thin-Walled Structures
, 216
(Part A)
, Article 113587. 10.1016/j.tws.2025.113587.
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Abstract
This paper investigates the post-fire behaviour of H500 austenitic stainless steel and its impact on the performance of steel-framed structures after a fire. Understanding the residual properties of structural materials following exposure to elevated temperatures and subsequent cooling is crucial for assessing structural safety, enabling reuse, and avoiding unnecessary demolition. Additionally, this knowledge is essential for evaluating stability during post-fire salvage and rescue operations to ensure emergency personnel safety. A series of post-fire experiments were conducted to determine the residual mechanical properties and microstructural changes of H500 stainless steel after different heating and cooling regimes. The results indicate that specimens rapidly cooled by submersion in cold water exhibit significant degradation in elastic properties and yield strength, particularly within specific temperature ranges. These experimental findings inform a newly developed nonlinear finite element model, which assesses the post-fire residual capacity of steel-framed structures with H500 stainless steel joints. The performance is compared with high-strength carbon steel and other stainless steel grades. The findings provide valuable insights to guide future research on the post-extreme-event resilience of structural components using H500 stainless steel.
| Type: | Article |
|---|---|
| Title: | Experimental and numerical assessment of H500 austenitic stainless steel in steel-framed structures after fire exposure |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.tws.2025.113587 |
| Publisher version: | https://doi.org/10.1016/j.tws.2025.113587 |
| Language: | English |
| Additional information: | © 2025 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/) |
| Keywords: | Stainless steel, Fire, Post-fire, Resilience, Experiments, Microstructural test, Numerical analyses |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10210458 |
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