【摘要】 薄壁H型钢梁的相关屈曲性能研究是进行其稳定设计的基础.作者以ANSYS分析软件为工作平台,采用基于SHELL181单元的双重非线性限元方法,对变截面H型钢梁的相关屈曲性能进行了深入研究.以计算获得的构件荷载位移曲线、不同荷载时刻的整体和局部变形形态为研究对象,重点考察了初始几何缺陷模式对等、变截面H型钢梁的相关屈曲性能的影响以及轴力对变截面H型钢梁的相关屈曲的影响.更多还原

【Abstract】 Used the finite element program ANSYS,the interactive buckling of H-Section steel beams with thin web in portal frame structure are analyzed.Based on the nonlinear finite element method for sheet-shell structures,SHELL181 element is adopted.According to the load-deflection curves and deformation shapes of members obtained,the influence of geometric initial imperfection(consistent imperfection;random imperfection)for the interactive buckling of tapered H-Section steel beams is researched respectively,and the effect of axial force on tapered H-Section steel beams is discussed.Some valuable conclusions are drawn.更多还原