Collapse-resistant performance of super-large cooling towers subjected to seismic actions
Collapse-resistant performance of super-large cooling towers subjected to seismic actions
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DOI：
10.1016/j.engstruct.2015.11.023
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发表时间：
2016-02
影响因子：
5.5
通讯作者：
Q. Yu;X. Gu;Yi Li;F. Lin
中科院分区：
文献类型：
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作者：
Q. Yu;X. Gu;Yi Li;F. Lin
本文对1/55比例的钢筋混凝土超大型冷却塔进行了振动台试验。对不同水平地震作用下的结构动力响应进行了测试和分析。分析了结构的薄弱环节、倒塌模式和破坏机理。还开发了一个数值模型，用于原型塔的弹塑性时程分析。据发现，柱子是塔最薄弱的部分。随着地面峰值加速度的增加，柱顶的加速度和位移响应增加最多。在强烈地震作用下，塔柱失效后失去支撑，整体倾斜倒塌。本文的研究成果可为今后冷却塔的改进设计提供参考。
In this paper, a shaking table test was conducted on a 1/55 scaled reinforced concrete super-large cooling tower. Structural dynamic responses corresponding to different levels of seismic actions were measured and analysed. The structural weakness, collapse mode and failure mechanism were investigated. A numerical model was also developed for elasto-plastic time history analysis of the prototype tower. It was found that the columns were the weakest part of the tower. The acceleration and displacement responses at the top of the columns increased most as the peak ground accelerations increased. Under strong-motion earthquake actions, the tower lost support after the columns failed and collapsed aslant overall. The research presented in this paper can contribute to the improved design of future cooling towers.