坑蚀对混凝土构件抗力统计参数的影响

Effect of pitting corrosion on statistucal papameters of resistance of RC members

为了研究具有随机分布的坑蚀对现役混凝土结构抗力统计参数的影响,根据随机变量的极值理论,分析了锈蚀钢筋面积参数的变化和受弯构件抗力统计参数的变化。结果表明:坑蚀随机性对混凝土构件抗力统计参数的影响显著,抗力统计参数随着分布数量和服役年限的增加,均出现下降的趋势。分析表明:研究基于坑蚀随机性的混凝土构件抗力统计参数的发展规律,为有效预测混凝土构件的可靠性奠定了理论基础。

In order to analyze the influence of stochastic pitting corrosion to the statistical parameters of resistance of service structure,According to the theory of extreme values of random variables,the change of statistical parameters for both corroded steel bar and resistance is also analyzed based on the randomness of pitting.The results indicated that the influence of the randomness of pitting to the statistical parameters of resistance is of the most significance,the statistical parameter was found to decline with the increase of number of random variables and the service life.The analysis show the research presented in the paper can provide theoretical basis of reliability of RC members.