Masonry component products are increasingly made industrially with reduced variation in mechanical properties. The joint is the only part of the masonry that is affected by manual action and so the load bearing capacity is not only determined by the quality of the bricks and mortar used but moreover by the way the masonry has been built and cured. As a result, it may be expected that the largest material variations are at the brick–mortar interfaces. This has been observed as irregular interface bonding with a bonded central area surrounded by fissures. As a consequence of the final shape of the joint, forces concentrate in the central part of the joint and strain variations occur near fissure tips which result in spalling of bricks in experiments. This paper demonstrates the need for detailed deformational measurements in the brick–mortar interface region. To overcome the limitations with traditional measuring instruments, a refined methodology based on the laser speckle technique is introduced in a companion paper [Canadian Journal of Civil Engineering, 34(11), 1467 (2007)] by the authors of this paper.
DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal.If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement:
The results of five experimental test series on masonry walls supported by reinforced concrete beams or slabs are reported and compared to theoretical predictions of the load bearing capacity. The experiments were performed on deep masonry beams built with respectively calcium silicate and clay brick. Investigated parameters were: position of the supports, concrete beam-masonry interface, concrete beam stiffness, type of loading, and height of masonry wall and concrete beam. Based on literature, the method proposed by Davies and Ahmed as well as the method according to Eurocode 6 were used to estimate the load bearing capacity of the tested masonry walls supported by concrete beams. The method of Davies and Ahmed allows for the determination of the stresses and stress resultants in the masonry. The analysis shows that near the support an inclined compressive force acts at the bed joint, which means that a shear-compression stress state exists in the bed joint. Strength evaluation has been carried out using the Mann-Müller criterion that is adopted in Eurocode 6. Based on the test results, it may be concluded that both methods yield conservative values of the load bearing capacity, as could be expected. Before cracking a linear elastic behavior was observed, while after cracking a strut-and-tie model may be applied. To develop more accurate design models, it is recommended to investigate the post-cracking behavior in more detail.Résumé : Le présent article présente les résultats de cinq séries d'essais expérimentaux réalisés sur des murs maçonnés, soutenus par des poutres ou des dalles en béton armé. Ces résultats sont également comparés avec des prédictions théoriques de la portance. Les essais ont été effectués sur des poutres-cloisons en maçonnerie, fabriqués soit avec du silicate de calcium soit avec des briques en argile. Les paramètres suivants ont été étudiés : le positionnement des supports, l'interface poutre en béton-mur maçonné, la raideur de la poutre en béton, le type de charge appliquée et la hauteur du mur maçonné et de la poutre en béton. Tout en se basant sur la littérature, on a utilisé la méthode proposée par Davies et Ahmed et celle conforme à la norme Eurocode 6 afin d'estimer la portance des murs maçonnés soutenus par des poutres en béton et soumis à des essais. La méthode de Davies et Ahmed permet de déterminer les contraintes et les résultantes des contraintes dans la maçonnerie. L'analyse effectuée montre qu'au voisinage du support une force de compression inclinée se comporte comme un lit d'assise, autrement dit qu'une contrainte de cisaillement-compression est présente dans le lit d'assise. Les paramètres de résistance ont été évalués à l'aide du critère de Mann-Müller utilisé dans la norme Eurocode 6. À partir des résultats des essais, on peut conclure que les deux méthodes fournissent des valeurs de portance modérées, ce à quoi on pouvait s'attendre. Avant fissuration, on observe un comportement élastique linéaire. Après fissuration, on peut appliquer un modèle à bielles et tirants. Po...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.