某大悬挑钢框架受力性能有限元分析

Finite Element Analysis on Mechanical Performance of Some Large Cantilever Steel Frame

对某工程大悬挑钢框架进行有限元分析,利用Shell181和Solid92单元分别建模,一种设置横向加劲板,另一种设置纵横向加劲和节点加腋。介绍了模型单元划分、荷载及边界条件等,描述框架在荷载作用下应力、应变及变形的发展过程,并将试验结果与有限元分析结果进行比较。在此基础上,对大悬挑钢框架的设计、工厂加工、现场吊装及施工监控提出一些建议。指出纵横向加劲肋以及节点处加腋对提高框架整体、局部稳定性有很大作用。

Some large cantilever steel frame is analyzed by FEM,in which Shell181 and Solid92 units are applied for modeling.In this engineering analysis,one is set transverse stiffened plates,and one is set longitudinal and transverse stiffening and joint haunch.The element division for model,loading and boundary conditions are introduced,and the developments of stress,strain and deformation for frame under loading are described.Moreover,experimental and FEM results are compared.On the base of them,some suggestions about design,manufacturing,hoisting and monitoring of large cantilever steel frame are proposed.It is pointed out that the longitudinal and transverse stiffening and joint haunch has great effect for integral and local stability of frame.