中文摘要：

针对结构系统刚度可靠性研究匮乏的现状，将数值分析与递推公式相结合，提出了刚架结构刚度连续变更方法，建立了刚度连续可靠性分析模型。在结构拓扑不断变更情况下，实现连续变更结构的位移极限状态函数的连续生成，避免了总刚反复组装、求逆，简化了识别系统主要失效模式方法，并与我国建筑结构设计规范相吻合。为结构系统刚度可靠性分析提供了一种有效的加速算法。算例验证了方法的正确性。

英文摘要：

Aiming at the insufficient research of reliability analysis on stiffness for system, the method of continual variation on stiffness for frame structure is derived. The method was combined with numerical analysis and recurrence formula. The model of continual reliability analysis on stiffness is provided. It is used to continually generate limit state function of the displacement for continual variation structures. This method can simplify the algorithm to identify system dominant failure modes because the repeated assembly global stiffness matrix and repeatedly inverse matrix operation are avoided in the new method. An accelerating calculation method of reliability analysis on the system stiffness is presented in accordance with the domestic structural design code. An example is given to verify the method.