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针对渡桥电厂冷却塔倒塌原因中的塔型因素,建立与之同壁厚、同高度、同筒底直径和相同人字柱的双曲线型冷却塔,分析两者动力特性的差别,比较自重、规范平均风荷载和风洞试验脉动风荷载作用下响应的差异。研究表明:渡桥冷却塔比双曲线型冷却塔的基频低30%;风荷载作用下渡桥冷却塔的径向位移比双曲线型冷却塔大很多,壳体扭曲程度较大;渡桥冷却塔迎风面的子午向薄膜力随塔高减小而迅速增大,最大拉力比双曲线型冷却塔大40%以上。渡桥冷却塔的塔型不如双曲线型合理,塔型不合理是构成渡桥电厂冷却塔倒塌的一个因素。
In view of the tower-type factors in the collapse of the cooling tower in Diaoqiao Power Plant, a hyperbolic cooling tower with the same wall thickness, the same height, the same bottom diameter and the same double-column shape was established to analyze the difference of the dynamic characteristics between the two, , Regulate the average wind load and wind tunnel test fluctuating wind load response to the difference. The results show that the cooling tower of the bridge is 30% lower than the fundamental frequency of the hyperbolic cooling tower; the radial displacement of the bridge cooling tower under the wind load is much larger than that of the hyperbolic cooling tower and the distortion of the shell is larger; The windward meridional film force of the cooling tower rapidly increases with the decrease of the tower height, and the maximum pull force is more than 40% larger than the hyperbolic cooling tower. Duqiao tower cooling towers than hyperbolic rational, tower unreasonable form a bridge tower power plant cooling tower collapse factor.