【摘要】 基于结构强度可靠性分析理论的基础之上,提出了不完整结构(结构系统中有部分元件已失效,但结构未变成机构仍具有一定的承载能力)强度、刚度可靠性的分析方法。该方法考虑了元件因强度失效对不完整结构系统强度、刚度可靠性的影响,同时导出了等效安全余量的形式,进而计算结构系统在失效各阶段的总体失效概率。并结合算例对结构系统在失效各阶段进行了强度、刚度的可靠性分析。算例表明,这样分析符合结构在使用各阶段可靠性的真实情况,从而为结构的合理利用起指导性作用。更多还原

【Abstract】 Based on structural strength reliability theory, a reliability analysis method of strength and stiffness of imperfect structures is proposed. The imperfect structure is defined as structure with partial element failure which does not yield a collapse mechanism and still has load bearing capability. This method considers the influence of failure elements on the reliability of imperfect structural strength or stiffness and gives equivalent safe margins. Therefore, the total failure probabilities of structural systems can be calculated at each failure state. A numerical example is studied. It is shown that such analysis is suitable for real reliability cases at each service state and the results are instructive for safety of structures in service.更多还原