摘要
用ANSYS有限元软件模拟分析了腹板开洞工字形截面圆弧拱在径向均布荷载作用下的平面外弹性屈曲性能。计算了在不同孔洞半径、孔洞间距、矢跨比、高厚比等参数下的屈曲荷载。得出腹板开洞工字形截面拱的平面外屈曲荷载随着孔洞半径的增大而减小,随着孔洞间距的增大而增大,通过研究孔洞的优化截面和弹性屈曲荷载,从中发现可以通过一种修正的弹性屈曲荷载建立优化准则来评价开洞拱的结构效率,孔洞半径在腹板高度的25%到35%之间时,结构的效率最高。
The out-plane elastic buckling of I-sectional arches with web openings is analyzed under subject to radial load with the ANSYS 11.0 finite element software.The buckling load at different hole diameter,hole spacing,height-span ratio,and height-thickness ratio is calculated.Through the study of section and elastic buckling load optimization,a method of the efficiency is established to evaluate the hole opening arch structure by a fixed set of elastic buckling load optimization criterion.When the Radius of hole is between 25% to 35% the height of web,the structure is efficiently.
出处
《建筑科学》
北大核心
2010年第S2期22-25,共4页
Building Science
关键词
腹板开洞拱
平面外屈曲
有限元分析
孔洞优化
arches with web openings
out-plane elastic buckling
finite element analysis
holes optimization
