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为将风致响应分析与承载安全性能评估结合起来,引入了一种简化的极限承载能力风振系数。通过计算出风荷载动力效应下与静风作用下结构整体极限承载能力的比值,较方便地实现了考虑风动力效应的斜拉网壳结构承载安全评估。然后讨论了网格厚度、荷载组合比例值和预应力水平等参数对简化风振系数的影响规律。结果表明:结构刚度越柔,屋面质量越轻,预应力水平越高,风动力效应的影响越显著一些。
In order to combine wind-induced response analysis with load-bearing safety assessment, a simplified wind-load factor of ultimate bearing capacity was introduced. By calculating the ratio of the ultimate bearing capacity of the structure under the effect of wind load and the static wind load, the safety assessment of the bearing capacity of the inclined reticulated shell considering the wind dynamic effect can be realized conveniently. Then the effects of grid thickness, load ratio and prestress level on the simplified wind-induced vibration coefficient are discussed. The results show that the more rigid the structure, the lower the quality of the roof, and the higher the prestressing force, the more obvious the effect of the wind dynamic effect is.