Circular economy; Demountable shear connectors; Fire performance; Flexural behaviour; Steel-concrete composite beams; Construction sectors; Demountable shear connector; Fire exposures; Flexural behavior; Management of wastes; Shear connector; Steel beams; Steel concrete composite beam; Civil and Structural Engineering
Abstract :
[en] In a context driven by the urgent need to promote sustainability and circularity in the construction sector, the use of demountable shear connectors in steel-concrete composite beams has a potential to make a significant contribution to reducing the carbon footprint, helping in the management of waste generated in the deconstruction stage through the “Design for Disassembly” concept. To ensure the viability of these shear connectors in practice, it is essential to understand their mechanical behaviour under various loading situations. This paper presents the outcomes of an experimental campaign comprising a series of beam tests conducted under both room and elevated temperature conditions. The results of the tests showed that, during a fire - provided that suitable protection is used for the steel beam -, the shear connectors retain their mechanical contribution and composite action between the steel beam and concrete slab is still active along fire exposure, thereby enhancing the flexural capacity of the beam. The findings from this investigation ensure the structural efficiency of demountable steel-concrete composite beams under both fire and ambient conditions, along with their alignment with the circular economy principles. This study sets the ground to facilitate the practical application of demountable steel-concrete composite beams in the construction sector.
Disciplines :
Civil engineering
Author, co-author :
Mora, P.S.; ICITECH, Universitat Politècnica de València, Valencia, Spain
Espinós, A.; ICITECH, Universitat Politècnica de València, Valencia, Spain
ODENBREIT, Christoph ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE)
Romero, M.L.; ICITECH, Universitat Politècnica de València, Valencia, Spain
External co-authors :
yes
Language :
English
Title :
Experimental study on the flexural behaviour of demountable steel-concrete composite beams at room temperature and under fire exposure (LAJ25.H)
Research Fund for Coal and Steel State Agency of Research Ministerio de Ciencia e Innovación
Funding text :
The authors gratefully acknowledge the Spanish \u201CAgencia Estatal de Investigaci\u00F3n\u201D for the help provided through the Project FIRSTIMB, carried out with a financial grant with reference TED2021\u2013130580B-I00 funded by MCIN/AEI/ 10.13039/501100011033 and by the \u201CEuropean Union NextGenerationEU/PRTR\u201D. The authors are also very grateful to the \u201CAssociation for the Promotion of Research and Technology of Fire Safety\u201D (AFITI) for the facilities used to conduct the tests.The research project REDUCE [15] , funded by the European Comission\u2019s Research Fund for Coal and Steel (RFCS), investigated demountable and reusable steel-concrete composite flooring systems with bolted shear connections. A comprehensive experimental campaign was carried out at the University of Luxembourg in the framework of the referred project, comprising push-out tests and beam tests at room temperature [16,17] . Two types of shear connections were studied: the first type corresponding to a fully demountable shear connector called \"Cylinder system\" (P3) ( Fig. 3 a), the second one being a partially demountable connector referred to as \"Coupler system\" (P15) ( Fig. 3 b).
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