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造粒塔是化肥厂工艺流程中的核心结构,结构的安全性直接关系到化肥厂生产的正常运行。该结构是将钢管混凝土柱通过环状桁架拉结形成中空筒状的高耸特种结构,在化肥厂的建造中得到了广泛应用。由于结构形式特异,稳定问题突出,目前这方面研究仍属空白。针对钢管混凝土造粒塔的结构特点,从屈曲分析对结构进行弹性稳定分析,用等效负刚度法确定出钢柱计算长度,同时求得环状加强桁架刚度需求,用高等分析对结构稳定性进行弹塑性稳定评估。以高等分析为基础,提出适合评价高层钢结构弹塑性稳定的一种新加载模式和评价方法,根据分析结果得出该类结构的稳定设计对策。
The prilling tower is the core structure of the fertilizer plant process, and the safety of the structure is directly related to the normal operation of the fertilizer plant. The structure is a high-rise special structure with a hollow cylindrical shape obtained by pulling a concrete-filled steel tubular column through a circular truss and is widely used in the construction of a fertilizer plant. Due to the specific structure and outstanding stability problems, the research in this area is still blank. According to the structural characteristics of concrete-filled steel tubular tower, the structure is analyzed by elastic analysis, the calculated length of steel column is determined by equivalent negative stiffness method, and the stiffness requirement of annular reinforced truss is obtained. The structural stability Elastoplastic stability assessment. Based on the advanced analysis, a new loading mode and evaluation method suitable for evaluating elasto-plastic stability of high-rise steel structures are proposed. Based on the analysis results, the stable design measures of such structures are obtained.