Evolution of the wind-induced stability of super large cooling towers during the whole process of construction
KE Shitang1,ZHU Peng2
1. Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China;
2. Tower college, Jiangsu post and telecommunications planning and design institute limited liability company, Nanjing, 210019, China
Abstract:The effects of the construction process are usually ignored while investigating the wind-induced stability of cooling towers. Choosing a domestic super large cooling tower (210 m) as the analysis object and considering the progress of the project and the calculation accuracy, the 3D models for eight cooling tower construction processes were established. THe three dimensional aero dynamic time history of the cooling tower during construction was obtained by a large eddy simulation. The validity of the numerical simulation was verified by comparing the measured tower wind pressure curves with the specification curves and the existing domestic and international measured curves. On this basis, taking the meridional axial force, which evolves in real time along with the construction progress, as a comparative object, the wind vibration coefficients in the construction period were presented. The integral and local stability of the cooling tower was analyzed by combinedly using the specification and the finite element method. The influences of the wind vibration coefficients, concrete age, construction loads, geometric nonlinearity and suction in the whole construction process on the cooling tower buckling stability and ultimate bearing capacity were discussed. The main conclusions were put forward, which are benefical to further understand the evolution and stability in the whole construction process of the cooling tower and to provide a scientific reference for protecting the cooling tower from the wind-induced failure in construction period.
柯世堂1 朱鹏1,2. 超大型冷却塔施工全过程风致稳定性能演化规律研究[J]. 振动与冲击, 2018, 37(10): 172-180.
KE Shitang1,ZHU Peng2. Evolution of the wind-induced stability of super large cooling towers during the whole process of construction. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(10): 172-180.
[1] H.J. Niemann, H.D. Kopper, Influence of adjacent buildings on wind effects on cooling towers[J]. Engineering Structures. 1998. 20(10): 874-880.
[2] Shitang Ke, Jun Liang, Lin Zhao, Yaojun Ge. Influence of ventilation rate on the aerodynamic interference for two IDCTs by CFD. Wind and Structures, An International Journal. 2015, 20(3): 449-468.
[3] 沈国辉, 刘若斐, 孙炳楠. 双塔情况下冷却塔风荷载的数值模拟[J]. 浙江大学学报:工学版, 2007, 41(6): 1017-1022.
Shen Guohui, Liu Ruofei, Sun Bingnan. Two cases the numerical simulation of the cooling tower wind load [J]. Journal of zhejiang university: engineering science, 2007, 41 (6) : 1017-1022.
[4] Maria Radwanska, Zenon Waszczyszyn. Buckling analysis of a cooling tower shell with measured and theoretically-modelled imperfections[J]. Thin-Walled Structures. 1995, 23: 107-121.
[5] S.T. Ke, Y.J. Ge, L. Zhao. Evaluation of Strength and Local Buckling for Cooling Tower with Gas Flue[C]. Proceedings of the International Symposium on Computational Structural Engineering. Beijing, China, P:545-551. August 8-10, 2009.
[6] 廖汶, 卢文达, 刘人怀,等. 考虑土壤-结构共同作用影响的双曲冷却塔可靠度[J]. 土木工程学报, 1998, 31(1): 52-59.
Liao Wen, Lu Wenda, Liu Renhuai,etc. Effect of soil-structure interaction on reliability of hyperbolic cooling tower[J]. CHINA CIVIL ENGINEERING JOURNAL, 1998, 31(1): 52-59.
[7] Zenon Waszczyszyn, Ewa Pabisek, Jerzy Pamin, Maria Radwanska. Nonlinear analysis of a RC cooling tower with geometrical imperfections and a technological cut-out[J]. Engineering Structures. 2000, 22: 480-489.
[8] Shitang Ke, Yaojun Ge. Extreme wind pressures and non-Gaussian characteristics for super-large hyperbolic cooling towers considering aero-elastic effect[J]. Journal of Engineering Mechanics, ASCE. 2015, 141(7), 04015010.
[9] Shitang Ke, Yaojun Ge, Lin Zhao, Yukio Tamura. Stability and reinforcement analysis of super-large exhaust cooling towers based on a wind tunnel test[J]. Journal of Structural Engineering, ASCE. 2015, 141(12), 04015066.
[10] 柯世堂, 侯宪安, 赵林,等. 超大型冷却塔风荷载和风振响应参数分析:自激力效应[J]. 土木工程学报, 2012, (12): 45-53.
Ke Shitang, Hou Xianan, Zhao Lin, etc. Parameter analysis of wind loads and wind induced responses for super-large cooling towers: self-excited force effects[J]. CHINA CIVIL ENGINEERING JOURNAL, 2012, 45(12): 45-53.
[11] 邹云峰, 牛华伟, 陈政清. 基于完全气动弹性模型的冷却塔风致响应风洞试验研究[J]. 建筑结构学报, 2013, 34(6):60-67.
Zou Yunfeng, Niu Huawei, Chen Zhengqing. Wind tunnel test on wind-induced response of cooling tower based on full aero-elastic moedel[J]. Journal of building structures, 2013, 34(6):60-67.
[12] 张明, 王菲, 李庆斌,等. 双曲线冷却塔施工期设计风荷载的确定[J]. 清华大学学报(自然科学版), 2015(12):1281-1288.
Zhang Ming, Wang Fei, Li Qingbin, etc. Design wind loads on hyperbolic cooling towers during construction[J]. Journal of Tsinghua University(Science and Technology), 2015(12):1281-1288.
[13] 中国经济周刊.江西丰城发电厂事故调查[EB/OL]. http://news.163.com/16/1205/18/C7HRF2R2000187VE.html, 2016-12-05/2016-12-10.
China Economic Weekly. The Jiangxi investigation of Fengcheng power plant accident [EB/OL]. http://news.163.com/16/1205/18/C7HRF2R2000187VE.html, 2016-12-05/2016-12-10.
[14] 杜凌云 柯世堂. 基于ANSYS二次开发冷却塔施工全过程风致极限承载性能研究[J]. 振动与冲击, 2016, 35(16): 170-175.
Lingyun Du Shitang Ke. Wind-induced Limit Bearing Capacity in Whole Construction Process for Cooling Tower based on ANSYS Secondary Development[J]. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(16): 170-175.
[15] 柯世堂, 赵林, 张军锋,等. 电厂超大型排烟冷却塔风洞试验与稳定性分析[J]. 哈尔滨工业大学学报, 2011, 43(2):114-118.
Ke Shitang, Zhao Lin, Zhang Junfeng, etc. Wind tunnel test and stability performance analysis of super large cooling tower with gas flue in power plant[J]. Journal of Harbin institute of technology, 2011, 43(2):114-118.
[16] 中华人民共和国建设部. DL/T 5339—2006 火力发电厂水工设计规范[S].北京:中国电力出版社, 2006.
The ministry of construction of the People's Republic of China. DL/T 5339-5339 power plant hydraulic design specification [S]. Beijing: China power press, 2006.
[17] 中华人民共和国建设部. GB/T 50102-2014 工业循环水冷却设计规范[S].北京:中国计划出版社, 2014.
The ministry of construction of the People's Republic of China. GB/T 50102-2014 industrial circulating water cooling design specification[S]. Beijing: China planning press, 2014.