Comparison of super-large cooling towers under earthquake excitation and wind load

Abstract:

In order to research the influence of super-large cooling tower under earthquake excitation and wind load,the rigid model and aero-elastic model of a super-large cooling tower in the wind tunnel were employed,the data obtained in the test were loaded to calculate the structural response.By the comparison with the response under earthquake excitation,it is obvious that the responses of annular base and tower shell are completely controlled by wind load,and the value under wind load is much greater than that under earthquake excitation.Vertical and hoop forces of tower shell are diminished from the bottom to the top,and the maximums are found at the middle of the tower shell.Their influence on supporting columns is not obvious.300 modes should be considered in mode analysis method,while 30 modes are only considered when the structural response is calculated under wind load.