弦支筒壳结构是张拉整体概念与单层筒壳相结合而形成的一种新型预应力钢结构体系,该结构整体的可靠度是否满足规范要求是其能否形成合理有效结构体系的关键。基于概率理论和灵敏度分析方法,研究结构主要参数对弦支筒壳可靠度的影响,进而对各参数进行灵敏度分析,并拟合出可靠指标的计算公式,得到弦支筒壳结构适用性条件下的目标可靠度。 The chord support shell structure is a kind of new type of prestressed steel structure system formed by combining the whole concept of tensioning and the single-layer shell shell. Whether the overall reliability of the structure meets the requirements of the specification is the key to whether it can form a reasonable and effective structural system . Based on the theory of probability and the sensitivity analysis, the main parameters of the structure are studied, and the sensitivity of each parameter is analyzed. The calculation formulas of the reliable index are also fitted, and the applicability of the support structure is obtained. The target reliability.