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索支撑柔性摩天轮结构抗倒塌性能分析

, PP. 406-413

Keywords: 土木建筑结构,摩天轮,稳定索失效,动力分析,倒塌

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Abstract:

研究了稳定索以某种模式失效时摩天轮结构的动力响应,考察是否会引起其他稳定索的连续失效,导致结构丧失侧向刚度而倒塌。通过动力分析得出,结构侧向位移和索力变化周期与该摩天轮结构的第一阶自振周期T1相近,且稳定索失效后0.5T1时,索回弹动力效应对摩天轮结构的影响最显著;稳定索在失效模式FM3-1(单侧3根稳定索失效)下,索回弹动力效应对摩天轮结构影响最大,且一侧稳定索最大索力达到64%的破断力,另一侧稳定索几乎处于松弛状态;在任一稳定索失效模式下,都不会造成其他稳定索的破断继而发生连续性破坏,此类大型柔性摩天轮结构具有抗倒塌性能。

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