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Experimental investigations of the joint-mortar behaviour

Abstract : An important failure mode of the masonry walls is the shearing process in joint mortar. In order to understand better this phenomenon, an experimental study is carried out on half brick couplet specimen. Load/Unload shear tests are performed to assess the type of the shear behaviour of the joint mortar. The cohesion and the internal friction angle are then derived from linear regression while assuming Mohr-Coulomb criterion. In particular, the influence of holes on the joint behaviour is studied by comparing results obtained with both solid and hollow bricks. In both cases, the experimental results show that there is not any stiffness degradation even in the softening regime. Actually, the shear modulus remains constant. Hence, the joint behaviour is considered to be elastoplastic, independently on the brick type. However, it seems that the presence of holes increases the stiffness but does not affect the internal friction angle of the joint mortar. (c) 2005 Elsevier Ltd. All rights reserved.
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Submitted on : Wednesday, May 2, 2012 - 11:22:45 PM
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L. Abdou, Ramdane Ami Saada, Fekri Meftah, Ahmed Mebarki. Experimental investigations of the joint-mortar behaviour. Mechanics Research Communications, Elsevier, 2006, 33 (3), pp.370--384. ⟨10.1016/j.mechrescom.2005.02.026⟩. ⟨hal-00693762⟩



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