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Abstract
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| The aim of this work is to assess the performance of different constructive solutions against explosions on the strength of masonry walls. The solutions tested, namely an external metal mesh, a glass fi bre fi lm on the external face of the wall and a basalt fi bre fi lm located on the inner face of the wall, have low to medium cost and are originally designed for other purposes, like seismic protection. Four cubic boxes 3 × 3 × 3 m were built using each of the solutions and typical masonry blocks. In the tests, a spherical plastic explosive initiated in the centre was placed at scaled distance of 2.9 m/kg1/3, so that moderate damage would be caused on the wall. In order to assess the performance of the explosive, pressure gauges were placed at the wall and at different distances from the explosion. Additionally, vibrations were monitored with seismographs in thefar field and a high-speed camera was used to estimate the shock wave velocity during the tests. The resulting damage has been evaluated on 13 points of the external wall of each box using a rebound hammer. Damage maps have been drawn for each wall based on these measurements and damage has been assessed inside the box considering the fragments mass launched during the test. The use of external metal mess leads to a decrease of 34 per cent on damage of the external wall and 38 per cent reduction of spalling. The use of a fi lm in the inner wall provides a strong reduction on spalling. | |
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International
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Si |
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Congress
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11th International Symposium on Rock Fragmentation by Blasting |
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960 |
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Place
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Sydney, Australia |
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Reviewers
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Si |
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ISBN/ISSN
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978-1-925100-32-7 |
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Start Date
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24/08/2015 |
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End Date
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26/08/2015 |
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From page
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1 |
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To page
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6 |
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11th International Symposium on Rock Fragmentation by Blasting The Australasian Institute of Mining and Metallurgy Publication Series nº 7/2015 |