The QRA model has a strong ability of analyzing adequately kinds of uncertainty in procedure of QRA and the superiority can be showed in three aspects. At first, the full probability method is used to research the cause of structure failures.

• 该模型的特点是可以在风险定量计算时,比较充分地考虑各种不确定性的影响:首先,在结构失效分析时采用了结构可靠度分析中全概率法的思想,以便能尽可能全面地分析各种不确定性对系统失效的影响,并使其在评价结果中得以反映。