双曲线冷却塔施工过程塔筒整体稳定性分析

Overall Stability Analysis of Hyperbolic Cooling Tower During Construction

冷却塔模态分析、风荷载和地震荷载作用分析,及成型冷却塔的稳定性分析,国内外研究比较多,而施工过程中冷却塔的整体稳定性分析尚没相关资料。利用欧洲规范关于混凝土性能和龄期的成果,借助有限元软件Sta-ad,对某冷却塔施工过程整体稳定进行分析,结果表明随施工高度的增加,整体稳定性降低。将有限元计算的稳定系数和规范值相比较,说明差异原因。

A number of studies have been carried out on the model analysis and stability analysis of cooling tower structure under wind and seismic loads for design.However,there are relatively few investigations on the overall stability analysis on the tower structure during construction.According to the standards of the concrete structure in Eurocode,the authors has performed a series of the overall stability analysis on the cooling tower in different construction phases by using the commercial finite element code Staad.The results show that the stability coefficients may decrease obviously with the increase of the construction height of the tower.Furthermore,the comparison of the stability coefficients obtained from the model to the Eurocode results indicates that they coincide with each other well.The model can thus be utilized to deal with the relevant projects.