Blast loading of structures is a complex system dependant on a vast number of parameters from both the structure and blast wave. Even for the simplest of structures, small changes to its size and shape can have a large effect on the result when subjected to blast; additionally, small changes to the pressure or duration of the blast wave can drastically alter its interaction with a specific structure. This paper, as part of a larger in-depth research study, investigates the breakage patterns and debris distribution of masonry panels subjected to blast loads with a positive phase duration typically exceeding 100ms. Three experimental trials were conducted in which ten masonry panels of varying geometries were subjected to blast loading with peak static overpressures of approximately 55kPa and 110kPa and positive phase durations of 200ms and 150ms respectively. All structures underwent total structural failure followed by a significant debris distribution with the results showing structural geometry, blast overpressure and impulse to be the key parameters responsible for the breakage pattern, initial fragmentation and debris distribution respectively.
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