Equivalent Static Wind Load of Large Cooling Tower

Abstract:

A new procedure is presented to calculate the equivalent static wind loads (ESWL) for the large cooling tower.Based on the synchronous multipressure measurement on the rigid building model,the generalized resonant modal displacement covariance matrix is obtained from structural equation of motion; then based on inertial wind loading(IML) method,covariance matrix of elastic restoring force containing the resonant components is obtained; the resonant response and equivalent static wind loads are calculated with loadsresponse correlation method.At last the total ESWL is obtained with linearity combination of background and resonant components.The proposed procedure avoids the integration process of calculating elastic restoring force with a full consideration of the modal coupling effects,which can be used to calculate the ESWL for any complex structures.The calculation of ESWL of the super large cooling tower of Ninghai Power Plant demonstrates the effectiveness of the present approach.