20.500.12556/DiRROS-28086 Updating of a deterministic model for the free thermal strain of concrete in fire during heating and cooling using novel experimental data and Bayesian inference With the rise of performance-based structural fire design, understanding the behaviour of materials during both the heating and cooling phases of a fire has become essential. Traditionally, research has focused on the heating phase, resulting in limited data on material properties during cooling, in particular for the free thermal strain of concrete. This gap is critical, as free thermal strain significantly influences load redistribution in reinforced concrete structures. Two experimental campaigns were conducted to expand the available data: one using the UGent HIFREP (‘High Intensity Fast-Response Electric Radiant Panel’) and the other employing an electric furnace. The first test campaign provided an extensive dataset on the residual thermal strain, whereas the time- consuming furnace tests provided data for the entire fire event (heating and cooling). These datasets were used to update an existing model through Bayesian inference, coherently integrating the new information. The outcome is a comprehensive probabilistic model that accurately captures the free thermal strain behaviour of concrete throughout both heating and cooling, allowing for a full reliability-based evaluation of concrete structures in fire. concrete cooling free thermal strain fire safety structural fire engineering experiments bayesian inference beton hlajenje prosta toplotna deformacija požarna varnost strukturna požarna tehnika eksperimenti bayesova inferenca true false true Elsevier Angleški jezik Slovenski jezik © 2026 Elsevier Ltd Neznano 2026-03-10 07:52:43 2026-03-10 08:00:59 2026-03-11 03:59:09 0000-00-00 00:00:00 2026 0 0 str. 1-11 [article no.] 104276 Vol. 161 Jun. 2026 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 0000-00-00 0000-00-00 2026-02-18 2028-02-18 620.1/.2 1873-7226 10.1016/j.firesaf.2026.104659 270827011 https://doi.org/10.1016/j.firesaf.2026.104659 0 bdfdc339-1c4d-11f1-acf8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=41491 RAZ_Put_Florian_2026.pdf RAZ_Put_Florian_2026.pdf 1 1C3C2BF00CE7741C2FED2A90B894382B 3a340bb9f4c151b78eb619fb064bbb822675c41d1ede45d2e8c1d7627636ef2f e09c6db1-1c4e-11f1-acf8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=41492 Zavod za gradbeništvo Slovenije 0 0 0