THE MULTI-DIMENSIONAL SEISMIC RESPONSE ANALYSIS OF UPER-ARGE HYPERBOLIC COOLING TOWERS

摘要

Cooling tower structure is a typical rotating thinshell structure. For more than 200m of super-large hyperbolic cooling towers,if the earthquake comes,the huge circular base is likely to withstand the impact of seismic waves from different directions,which makes the structure produce multi-dimensional vibration. Firstly,this paper uses response spectrum method to calculate the response of the super-large cooling tower under seismic action,and then,it adopts time-history analysis to study elastic seismic response of the structure under the action of onedimensional and bi-directional horizontal earthquake. The numerical results show that: the response of the cooling tower structure under the multi-dimensional earthquake is significantly greater than under the one-dimensional earthquake. The maximum displacement occurs near the throat of the tower,which is the weak part of the structure.