以某工程烟囱设计为例,应用有限元软件SAP2000作为工具,建立2种整体数值分析模型:杆单元模型和壳单元模型;杆单元模型着重分析单元力与位移之间的关系,可以直接输出结构构件的截面内力;壳单元模型着重分析结构单元的应力-应变关系,能够比较精确地反应出结构特性.对以上2种整体模型计算结果进行对比分析,探讨烟囱混凝土外筒与钢内筒整体建模的计算方法. Taking the chimney design of an engineering example as an example, two kinds of numerical analysis models are established by using the finite element software SAP2000 as the tool: the rod element model and the shell element model; the rod element model focuses on the analysis of the relationship between the element force and the displacement and can directly output the structure And the internal force of the member in the cross section of the chimney concrete shell.The model of the shell element focuses on the stress-strain relationship of the structural elements and can reflect the structural characteristics more accurately.The calculation results of the above two models are compared and analyzed, The calculation method of the mold