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Mechanical and fire tests on thermal breaks attached to concrete supports

Abstract : This paper deals with the mechanical and fire behaviour of simple solutions of thermal breaks for external steel structures (balconies, passageways, solar panels …) attached on a concrete facade with external thermal insulation. The proposed solutions are composed of a PVC or plywood layer implemented between an extended end-plate connection and the concrete support (lintel, floor slab, concrete wall). A total of 12 monotonic mechanical tests have been performed on steel-to-concrete connections using intermediate insulation layers (PVC or plywood) in order to investigate the rotational stiffness, plastic/ultimate bending moments, the rotation capacity as well as the failure mode. Two types of fastening were used; bolted embedded end-plates and post-installed mechanical/chemical fasteners. In order to evaluate the influence of the studied solutions of thermal breaks on the behaviour of a balcony under fire, two external flame experimental tests were carried out on realistic balconies attached to a concrete support. These fire tests demonstrated that the implementation of the proposed thermal breaks between end-plates and the support does not affect the stability of the balconies subjected to fire. © 2021
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https://hal.archives-ouvertes.fr/hal-03719692
Contributor : Laurent Jonchère Connect in order to contact the contributor
Submitted on : Monday, July 11, 2022 - 2:20:54 PM
Last modification on : Tuesday, July 12, 2022 - 3:46:22 AM

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A. Ben Larbi, M. Couchaux, C. Thauvoye, C. Sautot. Mechanical and fire tests on thermal breaks attached to concrete supports. Journal of Constructional Steel Research, Elsevier, 2022, 190, pp.107114. ⟨10.1016/j.jcsr.2021.107114⟩. ⟨hal-03719692⟩

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