detailed seismic risk assessment of a blast-resistant concrete building

Risk analysis plays a crucial role in pre-event planning by supporting informed decision-making and enabling effective strategies for crisis prevention and emergency response. this paper presents a comprehensive risk assessment of a specially designed concrete building with shear walls, engineered to withstand blast loads. both deterministic seismic hazard analysis (dsha) and non-extensive probabilistic seismic hazard analysis (nepsha) were conducted. the deterministic approach identified a peak ground acceleration (pga) of 0.6g at the building site. nepsha estimated pga values of 0.03g, 0.42g, and 0.74g for return periods of 10, 475, and 2,475 years, respectively. hazard analysis results were visualized as hazard maps using gis software. a three-story, blast-resistant concrete building with a 342-square-meter floor area and a shear wall lateral load-bearing system was modeled in opensees software. the structure's fragility curve was determined through incremental dynamic analysis (ida), revealing a fundamental period of 0.08 seconds. the study quantified the probabilities of various damage levels at different hazard intensities and, using fema's hazus methodology, estimated the resulting debris. findings indicate that the shear wall-reinforced building, designed for blast resistance, satisfies the requirements for the design-level earthquake. however, its performance under severe and deterministic earthquake scenarios-particularly at the immediate occupancy performance level-warrants further investigation.