根据正在修订的国家标准《混凝土结构设计规范》(征求意见稿 ,1999年 8月 )的有关要求 ,对正常使用极限状态控制设计的钢筋混凝土结构构件 ,推导了其可靠指标计算的一种近似方法 ,并采用“考虑基本变量概率分布类型的一次二阶矩方法” ,对上述结构构件正常使用极限状态的可靠度进行了全面的计算和分析 According to the requirements of the revised national standard “Code for Design of Concrete Structures” (Exposure Draft, August 1999), an approximate method of calculating the reliable index for reinforced concrete structural members designed for limit state control is derived , And adopts the “first-order second-moment method considering the probability distribution type of basic variables” to comprehensively calculate and analyze the reliability of the limit states in normal use of the above structural components