《建筑结构设计统一标准》(初稿)(以下简称《统一标准》)采用的概率极限状态设计法,是一种考虑了概率分布类型的可靠性设计法。在这种设计理论中,极限状态函数的基本变量,如结构构件的抗力、综合荷载效应等均采用随机变量概型来描述,并以这些基本变量的平均值和标准差表达的可靠指标β作为衡量结构可靠度的统一尺度。本文将 The “probabilistic limit state design method” adopted in “Unified Standards for Architectural Structural Design” (first draft) (hereinafter referred to as the “Uniform Standard”) is a reliability design method that takes into consideration the type of probability distribution. In this design theory, the basic variables of the limit state function, such as the resistance of structural components and the effect of combined loads, are all described by the random variable model, and the reliability index β expressed by the mean value of these basic variables and the standard deviation is taken as A unified measure of structural reliability. This article will