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STUDY ON STRUCTURE STABILITY OF CHEMICAL FERTILIZER PRILLING TOWER
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摘要: 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。
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关键词:
- 化肥工业造粒塔 /
- 屈曲分析 /
- 计算长度 /
- 高等分析 /
- 高层钢结构弹塑性稳定评估
Abstract: Prilling tower is the core structure in the technological process of Nitro-compound fertilizer plant，the safety of the structure is directly related to the normal operation of fertilizer production. Prilling tower is a hollow high special structure which is constructed by concrete-filled steel tube columns bonded by annular truss and widely used in fertilizer plant. As the special shape of the structure，there is no stability study on the tower. According to the characteristics of CFT prilling tower，buckling analysis is used to analyze the elastic stability of the demand on structure. Effective length is calculated with equivalent stiffness method and the stiffness of annular truss is identified. Based on advanced analysis method，high-rise steel frame elastic-plastic stability was assessed . A new load model and evaluation methods have been proposed. According to the analysis of such structures，design measures are proposed，which provides references for similar structures. -
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