Novel detonation-location mapping method for blast damage assessment with application to a 2D concrete slab

Blast-induced damage assessment of structures is increasingly important in modern safety engineering, as accidental and intentional explosions pose severe risks to critical infrastructure. Beyond explosive intensity, the location of detonation relative to a structure plays a decisive role in damage severity, yet systematic frameworks for location-dependent blast risk evaluation remain limited. This study proposes a novel spatial mapping framework that explicitly evaluates blast damage in the detonation location domain. Using a 2D concrete slab as a representative example, a large set of blast scenarios is simulated by systematically varying detonation location and explosive charge mass, while structural damage is quantified using a material damage parameter. The distributed internal damage is spatially averaged and mapped onto the blast location domain to construct location-resolved damage maps, which are further interpreted through damage state classification. The results reveal clear spatial patterns of damage severity and location-specific variations that are obscured when the detonation coordinates are reduced to a scalar intensity measure. The proposed approach establishes a scalable foundation for location-resolved blast safety assessment and future extension toward higher-fidelity models and data-driven risk analysis.