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EXPERIMENTAL INVESTIGATION OF THE IN-PLANE SHEAR STRENGTH OF MASONRY ASSEMBLAGES

Volume Title: ICASGE2025
Paper ID : 1118-ICASGE-FULL
Authors
1L'Universite Francaise D'Egypte
2Department of Building, Civil, and Environmental Engineering, Concordia University, Montreal, Quebec, Canada
Abstract
Concrete hollow block masonry is a reliable and widely used construction method, valued for its strength, ductility, and durability. Its cost-efficiency and capability of accommodating grout and reinforcement make it a practical and versatile construction method. Axial compressive strength and diagonal tensile strength (in-plane shear) are key parameters in designing masonry structures. Extensive research has been conducted on the compressive strength of concrete masonry prisms. However, few studies have investigated the influence of grouting and reinforcement on the diagonal tensile strength of full-scale masonry assemblages. This study experimentally evaluates the diagonal tensile strength of full-scale masonry assemblages (wallets) and the compressive strength of their masonry prisms counterparts. Nine full-scale wallets, each measuring 1.2 × 1.2 m, were constructed and tested following ASTM E519. The wallets were categorized into three groups: fully grouted with a reinforcement ratio of 0.42%, partially grouted with a reinforcement ratio of 0.17%, and ungrouted. Additionally, six full-scale concrete masonry prisms were tested under axial compression according to CSA S304, divided into grouted and ungrouted groups. The results showed that the diagonal tensile strength of fully and partially grouted wallets was significantly higher than that of ungrouted wallets by 371% and 256%, respectively. Reinforcement improved the shear strain capacity of the wallets after the initiation of the first crack. However, grouting was found to have no significant effect on the compressive strength of the masonry prisms.
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