Author

NGUYEN, T. D.
Centre Technique de Matériaux Naturels de Construction, Paris, France
MEFTAH, F.
Université Cergy-Pontoise, Laboratoire de Mécanique et Matériaux du Génie Civil 5, Cergy-Pontoise, France
MEBARKI, A.
Université Paris-Est, Laboratoire de Modélisation et de Simulation Multi Echelle, Marne-la-Vallée, France
DUPONT, O.
Centre Technique de Matériaux Naturels de Construction, Paris, France

Abstract

We study in this work the spalling problem of fired clay masonry walls exposed to fire according to ISO834. Fire experimental tests are performed on different types of walls: non load-bearing walls made with horizontal hollow blocks, and load-bearing walls made with vertical hollow ones. Based on the experimental observations, in particular, the failure analysis, a spalling criterion based on“detachment, buckling, and crushing”, is proposed to simulate the actual spalling mechanism. Numerical simulations are then performed and compared to experiments in order to evaluate the predictive capabilities of the developed modelling approach.

Key words
fire resistance, failure, spalling, modelling, load-bearing wall, hollow bricks