Quan, Chunyan;
Lapira, Luke;
Cashell, Katherine A;
(2025)
Behaviour and design of extended endplate hybrid steel beam-column connections at elevated temperatures.
Engineering Structures
, 342
, Article 120801. 10.1016/j.engstruct.2025.120801.
(In press).
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Abstract
In this paper, the behaviour of semi-rigid beam-column connections, with a primary focus on extended endplate connections, at ambient and elevated temperatures is investigated. Both pure carbon steel (including normal- and high-strength steel) connections and hybrid connections, i.e. incorporating carbon steel and stainless steel components, are considered. Upon validation against physical experiments, finite element models are developed to conduct comprehensive parametric studies, considering various combinations of endplate thicknesses and material grades, bolt sizes and material grades, and temperature levels. The numerical analyses results indicate that hybrid steel beam-column connections exhibit greater resistance and deformation capacity compared with carbon steel counterparts, especially at elevated temperatures greater than 500℃. The component-based design method provided in EN 1993–1–8:2024 for semi-rigid steel beam-column connections at ambient temperature is extended to cover fire scenarios; however, it only predicts the initial stiffness and plastic strength of beam-column connections. Therefore, another function is developed for predicting their ultimate strength at elevated temperatures. The developed fire design methods are shown to be safe and accurate through comparisons with the benchmark numerical results for carbon steel and hybrid steel and stainless steel beam-column connections.
| Type: | Article |
|---|---|
| Title: | Behaviour and design of extended endplate hybrid steel beam-column connections at elevated temperatures |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.engstruct.2025.120801 |
| Publisher version: | https://doi.org/10.1016/j.engstruct.2025.120801 |
| Language: | English |
| Additional information: | © 2025 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | Science & Technology, Technology, Engineering, Civil, Engineering, Beam-column connections, Elevated temperatures, Finite element modelling, Fire, Stainless steel, Steel, BOLTS |
| 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/10214861 |
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