烟囱混凝土外筒与钢内筒整体计算模型研究

Finite element analysis of integral model for R.C windshield shell and steel inner cylinder of chimney

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 a chimney design of a project for example,the finite element software SAP2000is applied to do holistic analysis of a chimney.Two integral models are built;one is pole element model and the other is shell element model.Pole element model focuses on the correlation between force and displacement of elements;it can output the section resultant force of components.Shell element model focuses on the correlation between stress and strain of elements;it can reflect features of the structure.The results of the two kinds of models are compared and analyzed.A holistic analysis method for R.C windshield shell and inner steel cylinder chimney is discussed.