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以国外某200m高钢筋混凝土结构冷却塔为设计原型,通过有限元方法对双曲线抛物面钢结构冷却塔尺寸参数进行优选。建立16组不同网格尺寸及网壳厚度的模型,基于国内常见的环境条件进行内力计算及结构优选以计算各模型相应用钢量。结果表明,当选定网格尺寸为4m、网壳厚度为5m时,双曲线抛物面钢结构冷却塔用钢量最小,且稳定性也满足《空间网格结构技术规程》(JGJ 7—2010)要求,但不同网格尺寸及网壳厚度对应结构用钢量及稳定性差异不大。
Taking a 200m reinforced concrete structure cooling tower abroad as the prototype, the size parameters of the hyperbolic parabolic steel cooling tower are optimized by finite element method. Based on the common environmental conditions in China, 16 groups of models with different grid sizes and reticulated shell thickness were established to calculate the internal force and optimize the structure to calculate the corresponding amount of steel used in each model. The results show that when the selected grid size is 4m and the reticulated shell thickness is 5m, the amount of steel used in the hyperbolic parabolic steel cooling tower is the smallest, and the stability meets the requirements of Technical Specification for Space Grid Structure (JGJ 7-2010) Requirements, but the different grid size and the thickness of the reticular shell structure corresponding to the amount of steel and stability is not different.