结构可靠度理论正在广泛为工程结构的各种标准、规范的编制和修订提供更加科学的理论基础。见于目前对工程结构设计规范可靠度校准都采用的是按可靠指标求平均的近似方法,本文在文献[1]的基础上提出了一种不仅在理论上较合理,而且还可收到一定经济效益的按失效概率求平均的精确方法。 Structural reliability theory is widely providing a more scientific theoretical basis for the preparation and revision of various standards and specifications for engineering structures. Seen in the current reliability calibration of engineering structure design specifications is used to approximate the average method by reliable indicators, this article based on the literature [1] proposed a not only theoretically more reasonable, but also can receive a certain economy The exact method of averaging the benefits by failure probability.