Fire performance of innovative steel-concrete composite columns using high strength steels
KeywordFire resistance; Steel-concrete composite sections; Concrete-filled steel tubular columns; Concrete-filled double steel columns; Embedded steel profiles; High strength steel
Rights© 2016 Elsevier. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
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AbstractThis paper presents the results of a numerical investigation on strategies for enhancing the fire behaviour of concrete-filled steel tubular (CFST) columns by using inner steel profiles such as circular hollow sections (CHS), HEB profiles or embedded steel core profiles. A three-dimensional finite element model is developed for that purpose, which is capable for representing the various types of sections studied and the nonlinear behaviour of the materials at elevated temperatures. High strength steel is considered in the numerical model, as a possible way to lengthen the fire endurance. The numerical model is validated against experimental results available in the literature for various types of steel-concrete composite sections using inner steel profiles, obtaining satisfactory results. Based on the developed numerical model, parametric studies are conducted for investigating the influence of the cross-sectional geometry and the steel grade of the inner profiles on the fire performance of these composite columns, for eventually providing some practical recommendations.
CitationEspinos A, Romero ML and Lam D (2016) Fire performance of innovative steel-concrete composite columns using high strength steels. Thin Walled Structures. 106:113-128.
Link to publisher’s versionhttps://doi.org/10.1016/j.tws.2016.04.014
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