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原文传递 Stability and Reinforcement Analysis of Superlarge Exhaust Cooling Towers Based on a Wind Tunnel Test

题名：	Stability and Reinforcement Analysis of Superlarge Exhaust Cooling Towers Based on a Wind Tunnel Test
其他题名：	Armitt,J.(1980)."Wind loading on cooling towers."J.Struct.Div.,106(3),623–641.
正文语种：	英文
作者：	S. T. Ke
关键词：	Exhaust cooling tower;Wind tunnel experiment;Strengthening scheme;Local stability;Overall stability;Ultimate load-bearing capacity;Wind effects
摘要：	The rigid pressure measurement and aero–elastic vibration measurement were performed to the largest exhaust cooling tower in Asia. Through analyses, the surface wind pressure distribution, multitower proportional coefficient, and wind-induced vibration coefficient of the exhaust cooling towers from the most unfavorable wind direction were obtained. On this basis, finite-element software and self-made repreprocessing and postprocessing programs were employed to analyze the ultimate load-carrying capacity and overall and local stabilities of exhaust cooling tower in three conditions, which include (1) no opening, (2) opening without strengthening, and (3) opening with different strengthening schemes, then the ultimate load-carrying capacity of exhaust cooling tower during construction under different load combinations was also analyzed. For cooling tower with opening, obvious stress aggregation was found near the opening, and the minimum safety factor for local stability of the tower throat area was 4.27. An effective strengthening scheme was proposed for such problem, e.g., the stress aggregation and local instability near the opening were effectively eliminated, and the critical wind speed for overall destabilization of exhaust cooling tower was increased. During the construction of exhaust cooling tower, as the constructed height increases, the critical wind speed for overall destabilization gradually decreases. When 100 template layers are constructed, the critical wind speed is 119.4 m=s, which is much higher than the designed wind speed of 49.0 m=s; and when the most unfavorable wind speed for destabilization was applied as regulated wind pressure, the wind speed for overall buckling destabilization is 69.1 m=s. With the consideration of internal suction, the critical wind speed for destabilization decreases by about 30％. In this paper, some useful conclusions can be used for reference in wind-resistant design of superlarge exhaust cooling towers.
出版年：	2015
论文唯一标识：	P-26Y2015V141N12023
英文栏目名称：	Technical Papers
doi：	10.1061/(ASCE)ST.1943-541X.0001309
期刊名称：	Journal of Structural Engineering
拼音刊名(出版物代码)：	P-26
卷：	141
期：	12
页码：	249-263