Failure mechanism and invalidation principle of a super-large cooling tower under downburst

被引：0
|
作者：
Ke S.-T. [1 ]
Li W.-J. [1 ]
Han G.-Q. [1 ]
Yang J. [1 ]
Ren H.-H. [1 ]
机构：
[1] Department of Civil and Airport Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing
来源：
Zhendong Gongcheng Xuebao/Journal of Vibration Engineering | 2022年 / 35卷 / 05期
关键词：
Downburst; Failure mechanism; Invalidation principle; Super-large cooling tower; Wind-induced response;
D O I：
10.16385/j.cnki.issn.1004-4523.2022.05.001
中图分类号：
学科分类号：
摘要：
In order to study the response characteristics and failure mechanism of a super-large cooling tower under downburst specific wind, the highest cooling tower, i.e., 228 m high, of the world in construction in Northwest China is taken as the object. The multi-scale finite element model of the structure is established by using the layered shell element method. The internal and external fluctuating wind pressures of super-large cooling tower under three typical conditions of downburst are obtained based on the LES. The whole process of wind-induced collapse of super-large cooling tower is analyzed. Combined with IDA, the failure mechanism of the super-large cooling tower under downburst is refined. The collapse invalidation principle of the super-large cooling tower driven by downburst is established. The results show that the wind pressure distribution on the surface of the tower under downburst is significantly different from that under normal wind. The failure mechanism of the super-large cooling tower changes from concave mechanism to outward mechanism with the increase of downburst center distance. When the energy failure index K≥2, the super-large cooling tower collapses. © 2022, Editorial Board of Journal of Vibration Engineering. All right reserved.
引用
收藏
页码：1037 / 1047
页数：10
相关论文
共 30 条
  • [11] Wang F Y, Xu Y L, Qu W L., Multi-scale failure analysis of transmission towers under downburst loading[J], International Journal of Structural Stability and Dynamics, 18, 2, (2018)
  • [12] Fujita T T, Caracena F., An analysis of three weather-related aircraft accidents[J], Bulletin of the American Meteorological Society, 58, 11, pp. 1164-1181, (1977)
  • [13] Li Honghai, Jinping Ou, Numerical simulation of the wind-induced pressure distribution on building surface in downburst, Engineering Mechanics, 28, z2, pp. 147-151, (2011)
  • [14] Ji Baifeng, Qu Weilian, Mean wind pressure distribution characteristics on tall building under downburst, Journal of Huazhong University of Science and Technology (Natural Science Edition), 40, 9, pp. 89-94, (2012)
  • [15] Zhang Y, Sarkar P, Hu H., An experimental study of flow fields and wind loads on gable-roof building models in microburst-like wind[J], Experiments in Fluids, 54, 5, (2013)
  • [16] Zhang Y, Sarkar P, Hu H., An experimental study on wind loads acting on a high-rise building model induced by microburst-like winds, Journal of Fluids and Structures, 50, pp. 547-564, (2014)
  • [17] Darwish M, Damatty A E., Critical parameters and configurations affecting the analysis and design of guyed transmission towers under downburst loading, Practice Periodical on Structural Design and Construction, 22, 1, (2017)
  • [18] Mara G T, Hong P H, Lee S C, Et al., Capacity of a transmission tower under downburst wind loading, Wind and Structures, 22, pp. 65-87, (2016)
  • [19] Wang Feitian, Ke Shitang, Wang Xiaohai, Et al., Structural failure criterion and robustness analysis of super-large cooling towers subjected to strong winds, Journal of Vibration Engineering, 34, 4, pp. 739-747, (2021)
  • [20] Wu Hongxin, Ke Shitang, Wang Feitian, Et al., Numerical simulation and force performance analysis of wind-induced collapse of super large cooling towers, Engineering Mechanics, 37, 5, pp. 199-207, (2020)
123