Wind-induced responses of super-large cooling towers
来源期刊：中南大学学报(英文版)2013年第11期
论文作者：KE Shi-tang(柯世堂) GE Yao-jun(葛耀君) ZHAO Lin(赵林) CHEN Shao-lin(陈少林) Y. Tamura
文章页码：3216 - 3228
Key words：super-large cooling towers; wind-induced responses; wind vibration coefficients; aero-elastic model; consistent coupled method
Abstract: Traditional gust load factor (GLF) method, inertial wind load (IWL) method and tri-component method (LRC+IWL) cannot accurately analyze the wind-induced responses of super-large cooling towers, so the real combination formulas of fluctuating wind-induced responses and equivalent static wind loads (ESWLSs) were derived based on structural dynamics and random vibration theory. The consistent coupled method (CCM) was presented to compensate the coupled term between background and resonant response. Taking the super-large cooling tower (H=215 m) of nuclear power plant in Jiangxi Province, China, which is the highest and largest in China, as the example, based on modified equivalent beam-net design method, the aero-elastic model for simultaneous pressure and vibration measurement of super-large cooling tower is firstly carried out. Then, combining wind tunnel test and CCM, the effects of self-excited force on the surface pressures and wind-induced responses are discussed, and the wind-induced response characteristics of background component, resonant component, coupled term between background and resonant response, fluctuating responses, and wind vibration coefficients are discussed. It can be concluded that wind-induced response mechanism must be understood to direct the wind resistant design for super-large cooling towers.
KE Shi-tang(柯世堂)1, 2, GE Yao-jun(葛耀君)2, ZHAO Lin(赵林)2, CHEN Shao-lin(陈少林)1, Y. Tamura3
(1. Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
2. State Key Laboratory for Disaster Reduction in Civil Engineering (Tongji University), Shanghai 200092, China;
3. Wind Engineering Research Center, Tokyo Polytechnic University, 1583 Iiyama,
Atsugi, Kanagawa 243-0297, Japan)
Abstract:Traditional gust load factor (GLF) method, inertial wind load (IWL) method and tri-component method (LRC+IWL) cannot accurately analyze the wind-induced responses of super-large cooling towers, so the real combination formulas of fluctuating wind-induced responses and equivalent static wind loads (ESWLSs) were derived based on structural dynamics and random vibration theory. The consistent coupled method (CCM) was presented to compensate the coupled term between background and resonant response. Taking the super-large cooling tower (H=215 m) of nuclear power plant in Jiangxi Province, China, which is the highest and largest in China, as the example, based on modified equivalent beam-net design method, the aero-elastic model for simultaneous pressure and vibration measurement of super-large cooling tower is firstly carried out. Then, combining wind tunnel test and CCM, the effects of self-excited force on the surface pressures and wind-induced responses are discussed, and the wind-induced response characteristics of background component, resonant component, coupled term between background and resonant response, fluctuating responses, and wind vibration coefficients are discussed. It can be concluded that wind-induced response mechanism must be understood to direct the wind resistant design for super-large cooling towers.
Key words:super-large cooling towers; wind-induced responses; wind vibration coefficients; aero-elastic model; consistent coupled method
