位移连续变更与极限状态函数的连续生成

基于我国《建筑结构设计统一标准》的极限状态设计原则,结构物不允许出现影响正常使用的外观变形,提出了刚架结构位移连续变更方法·用数值分析与递推公式相结合的方法,实现连续变更结构的变形极限状态函数的连续生成·重分析不必重新形成结构刚度矩阵,不必反复求逆矩阵,使得识别系统主要失效模式的方法得以简化,有效地提高了计算时效,并为刚度可靠性分析提供了新方法·算例验证了方法的正确性及实用性·

Continual Variation of the Displacement and Generation of Limit State Function

Based on the design principal of limit state provided in "unitive standard of design for architecture structure",in which the designed structure allows no appearance of deformation, the continual variation method of the displacement of frame structure was derived. The method of numerical calculus was combined with recurrence formula,to generate deformation limit state function of continual variational structure. This method can simplify the algorithm for identifying system dominant failure modes because the repeated assembly of global stiffness matrix and repeated inverse matrix operation in analysis are avoided. The calculation was increased effectively,and a new method for stiffness reliability analysis was presented. An example was given to illustrate the correctness and practicability of the method.