摘要
为研究冷成型不锈钢管轴心受压柱的稳定性能,进行了国产304牌号冷成型不锈钢方管、矩形管和圆管截面,共43根轴心受压柱试验。通过对不锈钢材料、轴压短柱试件和轴压长柱试件的试验研究,得到了试件的材料力学性能和极限荷载。分析了试件的长细比、宽厚比(径厚比)对其破坏模式及变形性能的影响。结果表明:试件的宽厚比(径厚比)对其破坏模式及变形性能有较大的影响。采用GB 50018—2002《冷弯薄壁型钢结构技术规范》、欧洲不锈钢结构设计规范、美国冷成型不锈钢结构设计规范中的计算方法以及Rasmussen提出的设计方法对试验试件进行了计算,并与试验数据对比结果表明,对于圆管试件,采用三本规范计算得到的承载力均高于试验值,偏于不安全,采用Rasmussen提出方法的计算结果与试验值较为接近;对于方矩管试件,各种方法计算结果相近,除短柱试件试验结果高于计算结果外,其余试件试验值均与计算结果吻合较好;GB 50018—2002《冷弯薄壁型钢结构技术规范》中的计算方法不能直接用于计算不锈钢管轴心受压柱承载力。
In order to study the behavior of cold-formed stainless steel hollow section columns, a total number of 43 stainless steel columns of Grade 304, including square hollow section, rectangular hollow section and circular hollow section, were tested under axial compression. The material properties and the ultimate strength of the specimens were obtained from the tests. The effects of the slenderness and the width-thickness ratio （ diameter-thickness ratio） of the specimens on the failure mode and deformation capacity were analyzed. The results indicate that the width to thickness ratio has considerable effect on the above mentioned behaviors. Test results were then compared with the predictions of GB 50018--2002, Technical code for cold formed thin-wall steel structures of China and the Eurocode 3： part 1.4, American code for cold formed stainless steel members, and design method proposed by Rasmussen. Comparisons show that for circular members, the predictions of Eurocode, American code and the design code for low carbon steel structure of China are higher than the test strengths, while the methods proposed by Rasmussen could provide accurate results ; for square and rectangular members, similar results are obtained using these methods： the test strengths of stub columns are higher than these prediction, while for slender members, these predictions are in good agreement with the test results. Currently, the method in design code for low carbon steel structure of China could not be used to predict the buckling strength of stainless steel column.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2013年第5期87-95,共9页
Journal of Building Structures
基金
国家自然科学基金项目(51178098
51008065)
江苏省产学研前瞻性联合研究项目(BY2009151
BY2012200)
关键词
不锈钢冷成型钢管
轴心受压短柱
轴心受压长柱
静力试验
受力性能
cold-formed stainless steel hollow members
axial compression stub column
axial compression long column
static test
mechanical performance
