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针对排烟冷却塔的开孔特性,对某超大型排烟冷却塔进行风洞刚体测压、测力和气弹测振试验,加载试验获得的相关参数进行结构风致响应计算,通过与地震作用下的结构响应进行对比发现,排烟冷却塔环基和塔筒部位响应完全由风振控制;人字柱主要承受轴力,受两者的影响差异不大;环基的径向、竖向弯矩及位移比常规无孔冷却塔数值明显增大,开孔周边塔筒产生明显的应力集中,其数值也远大于地震作用下的应力值,经稳定性分析发现需采取开孔加固措施控制风振影响。
Aiming at the characteristics of the opening of the exhaust cooling tower, the structural wind-induced response of a very large exhaust-gas cooling tower subjected to the rigid-body pressure measurement, the force measurement, the gas-and-air vibration test and the loading test were calculated. Compared with the structure response, it is found that the response of the tower base and tower part of the exhaust cooling tower is completely controlled by the wind vibration. The main bearing axial force of the trapezoidal column is not affected by the two. The radial and vertical bending of the annular base The moment and displacement are obviously higher than those of the conventional non-porous cooling tower. The tower around the hole has obvious stress concentration and its value is much larger than that of the earthquake. According to the stability analysis, it is necessary to take the measures of opening reinforcement to control the wind Vibration effects.