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本文指出,桥梁结构是受众多不确定性的因素影响(包括模糊性、随机性),这些因素都会导致桥梁安全程度的不确定性。目前,我们已认识到桥梁结构中,不仅包含随机因素,而且还包含模糊因素。本文在同时考虑影响桥梁安全的随机因素和模糊因素的基础上,分析了桥梁抗力的模糊性及荷载效应的模糊性。利用文[5]所研究的成果,提出了桥梁系统的模糊-随机可靠度,给出了计算的一般步骤,并举例说明。
This paper points out that the bridge structure is influenced by many uncertain factors (including fuzziness and randomness), all of which will lead to the uncertainty of bridge safety. At present, we have realized that the bridge structure contains not only random factors but also ambiguous factors. Based on the random factors and the fuzzy factors that affect the bridge safety, this paper analyzes the fuzziness of the bridge resistance and the fuzziness of the load effect. Using the research results in [5], the fuzzy-stochastic reliability of bridge system is proposed, and the general steps of calculation are given and illustrated.