建筑钢结构进展2025，Vol.27Issue(4)：14-23,10.DOI:10.13969/j.jzgjgjz.20231025001
冷弯薄壁不锈钢拼合箱形截面短柱轴压试验研究
Experiment of Cold-Formed Thin-Walled Stainless Steel Built-up Box Section Stub Columns Under Axial Compression
摘要
Abstract
In order to study the behavior of cold-formed thin-walled stainless steel built-up box section stub columns,a total of 25 fixed-ended stub columns including 14 built-up section specimens without holes,6 unstiffened channel or edge-stiffened channel section specimens and 5 built-up section specimens with circular web holes were tested under axial compression.The material of specimens was S30408 austenitic stainless steel.The experimental results involving failure modes,ultimate capacities and responses of load versus axial shortening were obtained and fully documented.The experimental results show that the type of built-up section has a significant effect on the ultimate bearing capacity of the built-up section column,in which the test specimens of CC-section and UU-section exhibit the largest and smallest bearing capacity respectively.The ultimate bearing capacity of built-up UU-section specimens is larger than the sum of the bearing capacity of the single channel section specimens.The holes on the web have almost no weakening effect on the ultimate bearing capacity of the specimens when the hole diameter-to-web height ratio is less than 0.5.The test results were compared with predictions calculated by the design method as per the current American Specification ASCE/SEI 8-22.It is found that the test strengths were lower than the predicted values,indicating that the current codified provision in ASCE/SEI 8-22 is not applicable to be directly used for ultimate bearing capacity predictions of the cold-formed thin-walled stainless steel built-up box section stub columns.关键词
不锈钢/冷弯薄壁型钢/拼合截面柱/试验研究/直接强度法Key words
stainless steel/cold-formed steel/built-up section column/experimental investigation/direct strength method分类
建筑与水利引用本文复制引用
靳春驰,李海汀,段立平,张佳慧..冷弯薄壁不锈钢拼合箱形截面短柱轴压试验研究[J].建筑钢结构进展,2025,27(4):14-23,10.基金项目
国家自然科学基金(52378166、52008243、52178147) （52378166、52008243、52178147）
