腹板开孔冷弯薄壁C型钢纯弯构件抗弯承载力研究

Study on bending strength of cold-formed thin-walled C-section steel flexural members with web holes

为了研究腹板开孔对冷弯薄壁C型钢抗弯承载力的影响,选取不同孔洞尺寸和不同孔洞数目的冷弯薄壁C型钢受弯构件进行了有限元分析,结果表明:当此类构件发生畸变屈曲失稳模式时,构件抗弯承载力随孔洞高度的增加呈现降低的趋势,但随孔洞数目的增加变化不大。

In order to study the effect of web holes on the bending strength of cold-formed thin-walled C-section steel flexural members,finite element analysis were conducted on cold-formed thin-walled C-section steel flexural members with the different size and different number of web holes.The results show that the bending strengths of such members decrease with an increase of hole height,but has little change with an increase of hole number when such members display distortional buckling.