针对高混凝土坝可靠度分析中极限状态函数不能显式表达且随机变量复杂的特点,基于变量的随机敏感性因子改进响应面法,提出了适用于高混凝土坝复杂结构系统的改进响应面法。算例结果表明,该法计算效率高、实用性强,是高混凝土坝及复杂水工结构物可靠度分析的较好途径。 In view of the fact that the limit state function can not be explicitly expressed and the random variables are complex in the reliability analysis of high concrete dams, an improved response surface method based on the random sensitivity factor of variables is proposed to improve the response surface method of the complex structure system of high concrete dams. The results of the example show that this method is computationally efficient and practical, which is a good way to analyze the reliability of high concrete dams and complex hydraulic structures.