套筒式烟囱钢内筒腐蚀受损的分析及处理

Structural Analysis and Treatment on a Chimney with Corroded Double Inner Steel Cylinders

针对某电厂套筒式烟囱建成使用仅4年,钢内筒就严重腐蚀受损的工程案例,利用有限元分析方法对该烟囱进行分析计算(包括腐蚀受损前后两种工况),研究结构动力特性。经对比分析腐蚀前后两种结构在竖向和横向荷载作用下的应力水平和稳定性,对腐蚀受损进行评估,并提出相应的处理方案。

An inner steel cylinder of a telescopic chimney has severely corroded only 4 years after the comstruction. In this paper. The finite element model （including before corrosion and after corrosion） dynamic analysis of the telescopic chimney was earied out. Several comparisons in the stress level and stability of the chimney under both vertical load and lateral dynamic load were presented. Assessments of the corrosion and corresponding method for treating this problem were also proposed here.