结构可靠指标矢量及其计算与应用

Computation and applications of structural reliability index vectors

从结构可靠指标的几何意义出发 ,提出了可靠指标矢量 ,并给出了它的计算方法。理论分析和算例结果表明 :可靠指标矢量既可表达可靠指标 ,又可方便地表示各失效模式之间的相关性。可靠指标矢量可较好地解决长期困扰结构体系可靠度分析和应用的难点之一——怎样计算各失效模式之间的相关性。

According to the geometrical meaning of the reliability index, a new concept-reliability index vector and corresponding computational method are put forward. The analysis and example results show that the reliability index vector can express reliability index as well as measure the correlation coefficient of limit states. A new method given by the reliability index vector can be used to calculate the correlation coefficient of the limit states, which is a one of the difficult puzzle problems for the structural system reliability analysis and application.