论文部分内容阅读
弦支穹顶结构是一种刚柔并济的新型复合空间结构,工程应用逐渐增多。而有关弦支穹顶结构的可靠性研究,却由于大型结构体系的可靠性研究难度大、成果少,目前仍较缺乏。同时由于初始缺陷及预应力损失是预应力结构体系不可避免的,在充分考虑初始缺陷和预应力损失随机性的基础上,运用蒙特卡罗法,计算模型在稳定控制、挠度控制和杆件强度控制三种不同的失效模式下的失效概率,得出失稳破坏是结构的主要失效模式,从而确定弦支穹顶结构的失效概率。
Stringed dome structure is a new type of composite space structure with rigidity and softness, and the engineering application is gradually increasing. However, the research on the reliability of the suspen-dome structure is still lacking due to the difficulty in researching the reliability of large-scale structural systems and the lack of achievements. At the same time, because of the initial defect and the loss of prestressing, the prestressed structural system is unavoidable. Based on the randomness of initial defect and prestressing loss, the Monte Carlo method is used to calculate the stability of the prestressed structure. By controlling the failure probability under three different failure modes, it is concluded that the failure failure is the main failure mode of the structure, so as to determine the failure probability of the suspen-dome structure.