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以“引入模糊示性函数的蒙特卡罗法”为基础,建立了一种混凝土构件裂缝控制可靠指标计算方法。对GB50010—2010《混凝土结构设计规范》以及修订前规范GB 50010—2002中裂缝宽度计算公式的可靠指标进行了计算比较。由此得出:GB 50010—2010中裂缝宽度计算公式的可靠指标处于1.0～1.4之间,较修订前规范公式的可靠指标整体下降了0.8左右。目前仍宜将规范公式的裂缝宽度计算保证率取为95%。
Based on the “Monte Carlo method of introducing fuzzy function”, a method to calculate the reliable index of crack control in concrete structures was established. Calculated and compared the reliable index of GB50010-2010 “Code for Design of Concrete Structures” and the formula of crack width in GB 50010-2002 before revision. It follows that the reliable index of the formula for calculating the crack width in GB 50010-2010 is between 1.0 and 1.4, which is about 0.8 lower than the reliability index before the revision of the normative formula. It is still appropriate to formulate the crack width calculation guarantee rate of 95%.