摘要
基于非线性板壳有限元结构分析方法，运用有限元分析软件ANSYS，对轻钢门式刚架考虑柱腹板屈曲，梁腹板不屈曲的极限承载力进行材料、几何双重非线性分析，研究了柱腹板高厚比、翼缘宽厚比、斜梁坡度、高跨比等几何参数的变化对刚架极限承载力的影响．计算结果表明：增加柱腹板厚度、柱腹板高度、翼缘厚度、斜梁坡度、高跨比可以提高刚架极限承载力；柱腹板高厚比在60～135范围内，翼缘宽厚比在9～15．43范围内变化时对承载力影响较大；而斜梁坡度在1／8～1／24范围内，高跨比在1／12—1／8范围内变化时对刚架极限承载力的影响较小，工程分析时可以忽略它们的影响．
Based on the non-linear finite element method for sheet-shell structures, the material and geometry diploid non-linear analysis on the ultimate load-carrying capacity of portal frame of light-weight steel structure is carried out when buckling of web plate of column is considered. The alterations of geometric parameters including web plate height-thickness ratio, flange width-thickness ratio, gradient and height-span ratio are analyzed; and then some conclusions are presented for engineering design. Results show that the augment of web thickness ,web height ,flange thickness ,gradient and height-span ratio can increase the ultimate load-carrying capacity of portal frame. Ultimate load-carrying capacity of portal frame changes greatly when web height-thickness ratio of column is 60 through 135, flange width-thickness ratio is 9 through 15.43. But changes little when gradient is 1/ 8 through 1/24, and height-pan ratio is 1/12 through 1/8. Therefore, theirs＇ influence can be ignored in project analysis.
出处
《江苏科技大学学报（自然科学版）》
CAS
北大核心
2008年第6期13-17,共5页
Journal of Jiangsu University of Science and Technology:Natural Science Edition
基金
镇江市社会发展资助项目(2006CH057J)
关键词
门式刚架
腹板屈瞳
极限承载力
非线性分析
portal frame
buckling of web plate
ultimate load-carrying capacity
non-linear analysis
