四川轻化工大学学报（自然科学版）2025，Vol.38Issue(1)：121-128,8.DOI:10.11863/j.suse.2025.01.14
加劲方孔冷弯型钢梁的畸变抗弯承载力研究
Research on Distortional Flexural Capacity of Cold-formed Steel Beams with Edge-stiffened Square Holes Under Bending
摘要
Abstract
Cold-formed steel members are commonly used in building structures due to its unique advantages.The perforated cold-formed steel beams allow the pipelines pass through,but the flexural capacity decreased because of the web perforations.In order to increase the flexural capacity,the cold-formed steel beams with edge-stiffened holes are applied in the engineering.However,the relevant design codes are still limited.To investigate the distortional flexural capacity of cold-formed steel beams with edge-stiffened square holes under bending,the effectiveness of the ABAQUS model is validated using existing experimental results.The influences of initial geometric imperfections,hole size,stiffener length,and hole spacing on the distortional flexural capacity of cold-formed steel beams with edge-stiffened square perforations are studied through parameter analysis.The results indicate that for the beams controlled by distortional buckling,the length of stiffeners significantly affect the flexural capacity of the member in the specific range.When the length of the stiffener increases from 0.01h to 0.08h,the flexural capacity of the member increases from 13.6 kN·m to 15.2 kN·m,resulting in an improvement of 11.8%.For economic efficiency,the optimal length value of the stiffeners is determined as 0.08h.Based on the results of parameter analysis,the design formulae for the flexural capacity of cold-formed steel beams with edge-stiffened square holes failed by distortional buckling are proposed.关键词
冷弯型钢梁/加劲方孔/抗弯承载力/等效厚度/直接强度法Key words
cold-formed steel beam/edge-stiffened square hole/distortional flexural capacity/equivalent thickness/direct strength method分类
建筑与水利引用本文复制引用
马航峰,余南霆,袁伟斌..加劲方孔冷弯型钢梁的畸变抗弯承载力研究[J].四川轻化工大学学报（自然科学版）,2025,38(1):121-128,8.基金项目
浙江省自然科学基金项目(LY19E080020) （LY19E080020）
