Calculation of Top Deflection of Variable Cross-section Tower Vessel under Lateral Force
YU Qun;Sinopec Nanjing Engineering Co.,Ltd.;
In view of the problem of no simple and convenient calculation formula when the deflection at the top of some tower vessels with very big height-diameter ratio H/D exceeds the standard and civil construction frame is provided for limiting the defection,by using the stiffness superposition method,the formula for calculating the top deflection of the tower vessel with variable sections( including unequal diameter or unequal wall thickness,and any combination of them) under action of lateral force was derived. By using the principle of load superposition,the actual sectional axial stress and the deflection of the tower top obtained were the superposition result of "various loads such as internal pressure,the wind load,earthquake load,eccentric load,etc. specified in the standard"and "the concentrated force given by the limiting device acting at the setting height when a civil construction frame is provided for limitation".Also,in this paper,it was pointed out that it is needed to combine height adjustment of the limiting device of the civil construction frame with the magnitude adjustment of its concentrated counterforce on the tower container so as to achieve the requirement of optimum integrated techno-economic costs.
【CateGory Index】： TQ053.5