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In order to enhance the precision of the criteria for identifying major accident hazards, an evaluation method for major accident hazards based on ATA was proposed. This method systematically applied evaluation tools such as the risk matrix and accident tree analysis to determine high-risk and above accidents through accident risk classification and used as the top event for ATA. The accident tree was simplified using Boolean algebra rules to obtain the ranking of the structural importance of each basic event that could induce the accident. According to the "80/20 Rule", the top 20% of basic events with the highest structural importance were identified to determine the core events that could lead to the accident, which were then regarded as major accident hazards for precise control. A case study on high-rise building fires was conducted for validation. The results demonstrate that the failure of the automatic fire alarm system has the highest structural importance in the fire accident tree of high-rise buildings through ATA. It should be judged as a major fire hazard clause of high-rise buildings. Therefore, the evaluation method for major accident hazards based on accident tree analysis can effectively determine the criteria for identifying major accident hazards.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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