中文摘要：

主要失效模式的识别是结构体系可靠度分析的难点和关键。该文首先综述了主要失效模式识别的国内外研究现状及存在的缺陷;然后针对传统失效模式识别方法主要依靠工程经验确定约界阈值、难以兼顾计算效率和计算精度的问题,介绍了一种结构体系可靠度分析的自适应动态约界法;同时,针对传统失效模式识别方法的路径依赖性所带来的计算量大、识别效率不高等缺陷,介绍了一种结构体系可靠度分析的无路径依赖性方法;最后通过算例分析,验证了这两种方法的有效性和适用性。

英文摘要：

Identification of dominant failure modes is one of the most critical problems for structural system reliability analysis. In this paper, the recent research progress and existing disadvantages for traditional methods for identification of dominant failure modes is reviewed first. To overcome the disadvantages of traditional approaches for identification of dominant failure modes in which the computational efficiency and accuracy cannot always be guaranteed due to the fact that the bounding thresholds are determined by engineering experience, an adaptive dynamic bounding method for structural system analysis is proposed. Meanwhile, to overcome the disadvantages of the traditional methods of high computational cost and low efficiency due to the behavior of failure path dependency, a failure path-independent method is presented for structural system reliability analysis. The efficiency and applicability of the proposed methods are verified through two numerical examples.