The type of pillars and the value of wind vibration coefficient of a super large cooling tower struc-ture are particularly important for its wind resistance stability.Based on the Anhui Pingshan Power Plant PhaseⅡ national largest thermal power unit super-large cooling tower demonstration project,a three-dimensional finite element precision full-scale model of the super-large cooling tower was established.Six Ⅰ-type pillar cross-sec-tion schemes were proposed,and their effects on structural mode,minimum local stability factor and mass par-ticipation coefficient were explored.Based on the determined cross-section scheme,a scaled model of the cool-ing tower was established and rigid body pressure wind tunnel tests were conducted.Finally,the wind vibration coefficient value of a super-large cooling tower considering Ⅰ-type pillars was given.It was shown that the mini-mum local stability factor for different column widths and the sum of the first 1000-order mass participation coef-ficients are basically the same.The Ⅰ-type column width of 2m is the optimal solution for the super-large cooling tower column,and the recommended values for the overall wind vibration coefficient of the super-large cooling tower under single tower and the most unfavorable wind direction angle are 1.77 and 1.95 respectively.The re-search conclusion can provide a reference for the selection of the cross-section and structural wind resistance de-sign of such super-large cooling towers.
Super large cooling towerType Ⅰ pillarSection selectionWind vibration coefficient
维普
万方数据
