20.500.12556/DiRROS-20895 Experimental investigation on the effect of natural fire exposure on the post-fire behavior of reinforced concrete beams using electric radiant panel In this study, the effects of natural fire exposure on the post-fire behavior of concrete beams are investigated. The study is based on laboratory tests where three reinforced concrete beams were subjected to fire exposure using an electric radiant panel. This panel enables a precise application of radiative heat exposure closely mimicking natural fire exposure in a safe manner. During the test, the deflections, deformations and temperature changes are measured for all three concrete beams. Additionally, finite element modeling (FEM) is applied to supplement these tests, demonstrating the performance of existing structural fire engineering calculation tools in evaluating the burnout performance of concrete beams. The results of the tests show that the electric radiant panel provide a novel approach for fire simulation which is effective in replicating natural fire conditions, by applying the heat flux as specified in the Eurocode Parametric Fire Curve in a highly controlled manner. The uniformity of the temperature field measured inside the beams and the consistent deformations observed during the heat exposure across all three tests underscores the accuracy of the fire simulation. Furthermore, post-fire assessments reveal that while the exposed beams suffered some reduction in load-bearing capacity, they retained a significant portion of their original strength that was consistent across all three beams. The numerical simulations conducted in this study demonstrate a high level of accuracy in predicting the behavior of the concrete beams during fire exposure. These simulations effectively mirrored the experimental results, validating that they are a valuable tool for assessing concrete structures' performance in fire scenarios. concrete beam fire testing numerical modeling radiant panel betonski nosilec požarno testiranje numerično modeliranje sevalna plošča true false true Thomas Telford Angleški jezik Slovenski jezik © 2024 fib. International Federation for Structural Concrete Neznano 2024-11-28 09:56:03 2024-11-28 10:27:32 2026-01-29 07:16:25 0000-00-00 00:00:00 2024 0 0 str. 3629-3644 iss. 3 vol. 26 Jun. 2025 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 0000-00-00 0000-00-00 2024-11-25 2025-11-25 620.1/2 1751-7648 10.1002/suco.202400550 216514563 https://onlinelibrary.wiley.com/doi/10.1002/suco.202400550 1 9bdde6f4-ad66-11ef-ba3f-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=29540 DiRROS_AAM_2_verzija_Experimental_investigation_on_the_effect_of_natural_fire_216514563.pdf DiRROS_AAM_2_verzija_Experimental_investigation_on_the_effect_of_natural_fire_216514563.pdf 1 C13525CCC2E76A44F922E530E865ACF8 06583ce932dc2f94a0daf5ba43334ae38b8c6882e01f2bebc68fe57dcb1d4cdb 491b5d23-fc2d-11f0-a15d-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=39588 Zavod za gradbeništvo Slovenije 0 0 0