中文摘要：

考虑区间变量非概率可靠性模型，采用非概率可靠性指标、安全系数和集合可靠度三类确定性参数描述结构的可靠性和安全程度．通过几何描述，明确地给出了三类参数的物理意义，指出了各自的取值范围和实用区间．从设计思想、度量方法及表现形式方面分析了三类度量的区别，并建立了它们之间的函数关系．研究结果拓展了结构非概率设计理论，并通过具体优化算例对三类度量所得到的结果进行了讨论．

英文摘要：

With the consideration of interval variables in non-probabilistic reliability model,three kinds of parameters, including reliability index, safety factor and set-theoretic reliability measurement, were a dopted to represent the reliability and safety measurement of the structures. The physical means of the three kinds of parameters were described through geometric representation and the value range and practical region were suggested. Furthermore, the differentiation among three kinds of parameters was investigated in design concept, measurement and representation formation, so that the function relationship among them was then built up. The present results extend the non-prohahilistic theory for structure design. The optimal scheme has been demonstrated through examples and results were discussed.