三维结构失效模式间相关性的研究

Research of Correlation between 3-D Structure Failure Modes

采用失效边界的等效线性化模型，基于三维随机有限元，对三维结构失效模式间相关性问题进行了研究。计算过程中，单元失效事件交集概率的计算采用逐步等效线性ＪｏｈｎｓＯｎ求交法。在考虑失效模式间相关性时，计算了某一典型重力坝的体系可靠度。

ased on 3-D stochastic finite element methed(SFEM),equivalent linear failure region medel is used in the research of correlat ion between 3-D structure failure modes.The probability of intersections is calculated using the step-by-step equivalent linear Johnson methed.The correlation between fail ure modes being considered,the system rellability of a standard gravity dam is calculated.