For the fire-explosion coupling scenario (3), focusing on the fragility of a target equipment unit (storage tank), fire thermal radiation will cause the temperature of the tank wall to rise rapidly within a certain period of time, resulting in the attenuation of the mechanical properties of the tank wall material . Ding et al. and Yuan et al. have proved that the anti-explosion performance of storage tanks would decrease significantly after suffering a certain period of fire thermal radiation. This indicates that the coupling effect of fire thermal radiation and explosion overpressure could have a significant contribution to the failure of a target unit and accident escalation.