Title: Determination of the stress-strain relationship as a function of temperature for the design of AAC masonry panels subject to fire according to Eurocodes

Authors: Marco Andreini; Lorenzo Miccoli

Addresses: Studio Masiello Strutture, Via Giovanni Battista Picotti 6, 56124 Pisa, Italy ' Xella Technologie- und Forschungsgesellschaft mbH, Department of Applied Research / Building Physics Hohes Steinfeld 1, 14797 Kloster Lehnin, Germany

Abstract: At the current status, the European Standard provides only tabulated data as a reliable method to assess the structural fire resistance of masonry walls. In the version in force, Annex C and D are mostly considered not reliable for design since an adequate validation by experimental results is missing. For this reason, this paper proposes an advance of the input parameters adopted by the models for the thermo-mechanical response of AAC. In addition, new stress-strain curves as a function of temperature are then proposed and compared with the stress-strain curves currently available in the Annex D of the European Standard. The comparison of results points out that the current curves do not fit properly to the behaviour of AAC masonry in a range of temperatures equal to 500°C-700°C.

Keywords: thermo-mechanical response; performance-based approach; aerated autoclaved concrete; Eurocode 6; fire resistance.

DOI: 10.1504/IJMRI.2022.126541

International Journal of Masonry Research and Innovation, 2022 Vol.7 No.6, pp.589 - 599

Received: 25 Jan 2021
Accepted: 28 Aug 2021
Published online: 28 Oct 2022 *

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