基于ANSYS的复杂钢网架支座节点分析
|
摘要
结合日照某项目中一处构造复杂且受力较大的钢网架结构支座节点,采用ANSYS软件对其进行线性及非线性有限元静力分析,确保其承载力性能满足结构设计要求。在线性有限元分析中,假定钢材为各向同性材料,对节点应力及变形进行了分析阐述,虽在不同构件交贯处存在应力集中现象,但均在焊缝加厚区域内且应力衰减很快。在非线性有限元分析中,同时考虑几何非线性和材料非线性,假定钢材为理想屈服材料,对钢构件在整个加载过程中的应力分布及变化趋势进行了分析阐述,进一步印证了节点屈服范围很有限,故不会影响到节点承载力性能。针对此类复杂支座节点提出了设计建议。
In terms of a certain project in Rizhao,analysis on a support joint with complicated geometry of the space truss was conducted,which is heavily loaded. ANSYS was adopted to conduct both linear and nonlinear finite element static analysis,which ensured that the joint satisfied the ultimate limit state. In terms of linear finite element analysis,steel material was assumed to be isotropic,and results of von Mises stress and deformation were illustrated. Stress concentration only occurs near the intersection of different components within thickened areas due to welding lines,which decayed rapidly away from the intersection of different components. In terms of nonlinear finite element analysis,both geometric and material nonlinearity were considered,and steel material is assumed to be elasto-plastic. The stress distribution within the whole load steps was briefly illustrated,which further proved that yielding areas were quite limited and cannot reduce the joint capacity. Some instructive advice was proposed concerning similar support joints.
In terms of a certain project in Rizhao,analysis on a support joint with complicated geometry of the space truss was conducted,which is heavily loaded. ANSYS was adopted to conduct both linear and nonlinear finite element static analysis,which ensured that the joint satisfied the ultimate limit state. In terms of linear finite element analysis,steel material was assumed to be isotropic,and results of von Mises stress and deformation were illustrated. Stress concentration only occurs near the intersection of different components within thickened areas due to welding lines,which decayed rapidly away from the intersection of different components. In terms of nonlinear finite element analysis,both geometric and material nonlinearity were considered,and steel material is assumed to be elasto-plastic. The stress distribution within the whole load steps was briefly illustrated,which further proved that yielding areas were quite limited and cannot reduce the joint capacity. Some instructive advice was proposed concerning similar support joints.
引文
[1]潘颖,秦林肖.基于ANSYS的XX型圆管相贯节点静力性能研究[J].系统仿真学报,2016(7):1679-1684.
[2]候立新,梁进财,李景旺,等.齐平端板连接纯钢节点的有限元分析[J].黑龙江科技信息,2008(22).
[2]候立新,梁进财,李景旺,等.齐平端板连接纯钢节点的有限元分析[J].黑龙江科技信息,2008(22).