Earthquakes and Structures

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Shear behaviour of AAC masonry reinforced by incorporating steel wire mesh within the masonry bed and bed-head joint

  • Richard B. Lyngkhoi (Department of Civil Engineering, National Institute of Technology Meghalaya) ;
  • Teiborlang Warjri (Department of Civil Engineering, National Institute of Technology Meghalaya) ;
  • Comingstarful Marthong (Department of Civil Engineering, National Institute of Technology Meghalaya)
  • Received : 2024.02.26
  • Accepted : 2024.03.20
  • Published : 2024.05.25
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Abstract

In India's north-eastern region, low-strength autoclaved aerated concrete (AAC) blocks are widely used for constructing masonry structures, making them susceptible to lateral forces due to their low tensile and shear strengths and brittleness nature. The absence of earthquake-resistant attributes further compromises their resilience during seismic events. An economically viable solution to enhance the structural integrity of these masonry structures involves integrating steel wire mesh within the masonry mortar joints. This study investigates the in-plane shear behaviour of AAC masonry by employing two approaches: incorporating steel wire mesh within the masonry bed joint "BJ" and the masonry bed and head joint "BHJ". These approaches aim to augment strength and ductility, potentially serving as earthquake-resistant attributes in masonry structures. Three distinct variations of steel wire mesh and three reinforcing arrangements, i.e. (-), (L) and (Z) arrangement were employed to reinforce the two approaches. The test result reveals a significant enhancement in structural performance upon inclusion of steel wire mesh in both reinforcing approaches, with the "BHJ" approach outperforming the "BJ" approach and the unreinforced masonry, along with increase in capacity as the wire mesh size increases. Furthermore, the effectiveness of the reinforcing arrangement is ranked with the (Z) arrangement showing the largest performance, followed by the (L) and (-) arrangement.

Keywords

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