Research On Quantitative Risk Assessment Of Storage Tank Accidents Caused By Eearthquake

With the acceleration of the process of urban industrialization,the NATECH of earthquake and industrial accidents(Natural and Technological Disasters)are increasing gradually.NATECH is consistent with the time and place of its occurrence,and if the rescue force is insufficient,the hazard will be more serious than that of the individual.Storage tanks are also important storage facilities for dangerous chemicals.Therefore,quantitative risk assessment for accidents caused by earthquakes is of great importance.This paper focuses on the effects of earthquake on the storage tank.Through statistical analysis of historical statistics,the failure probability of tanks under different risk situations is obtained by MATLAB fitting.Two accident scenarios caused by the rupture of gasoline storage tanks are selected: pool fire or vapor cloud explosion.Two kinds of accident scenarios are simulated using quantitative risk analysis software.The maximum value of the thermal radiation value of the fire root fire is 20.33kw/m2,the maximum range of the downstream wind is 73 m,and the maximum range of crosswind distance is 53.5m.After the explosion of the vapor cloud,the light injury radius of the personnel in the storage tank area is about 10.7m,the heavy injury radius is 5.9m,and the death radius is 3.9m.When the wind speed is changed and the lower wind side is the same distance,the higher the wind speed is,the higher the heat radiation value,the greater the overpressure of the shock wave in the same position,and the wider the influence range of the steam cloud explosion.Combined with population density,accident consequence and PGA at 0.35,the failure probability of the tank's catastrophic failure is obtained.The personal risk and social risk of the gasoline tank area are simulated,and the corresponding suggestions are put forward based on the simulation results.