摘要
对14根国产304牌号冷成型不锈钢方管进行轴心受压试验,试件的长细比为7.45~73.08,宽厚比为21.17~66.95,得到试件的荷载-位移曲线、荷载-应变曲线、极限荷载和破坏模式.分别采用《不锈钢结构技术规程》和欧洲规范计算,将计算结果与试验结果比较,结果表明:短试件采用欧洲规范和《不锈钢结构技术规程》的计算方法进行设计过于保守,长细比为7.45~19.85的短试件保守值约为14.5%~16.7%,长试件则与规范的设计曲线吻合较好;试验数据与规范曲线的吻合度随着正则化长细比的增大而提高.最后,将试验结果与已有文献试验结果对比,两者结果比较接近,进一步确认了试验结果的正确性.
14 pieces of domestic 304-brand cold-formed square stainless steel tubes under axial compression were experimentally investigated, where the slenderness ratio of specimens was from 7.45 to 73.08 and the width-to-thickness ratio was from 21.17 to 66.95, and load vs displacement curve, load vs strain curve, ultimate load, and failure mode were obtained. At the same time, the stainless steel structure technology specification and European standard were used respectively to calculate these items and the calculation results were compared with the experimental results. The comparison results showed that the design of the short specimen would be too conservative when the European standard and stainless steel structure technical specification were used. The conservative magnitude would be about from 14.5% to 16.7% when lendness ratio was between 7.45 and 19.85, while the behavior of the long specimen would be more consistent with the standard design curve. The agreement of experimental data with standard curve would be improved with the increase of the regularization length ratio. Finally, the experimental result was compared with the experimental result available in literatures, and it was shown that they would coincide with each other so well that the validity of the test result was further confirmed.
作者
唐红元
周欢
彭春梅
郭浩翔
TANG Hong-yuan;ZHOU Huan;PENG Chun-mei;GUO Hao-xiang(School of Civil and Architecture, Xihua University, Chengdu 610039, China;Luzhou Vocational and Technical College, Luzhou 646600, China)
出处
《兰州理工大学学报》
CAS
北大核心
2019年第3期126-131,共6页
Journal of Lanzhou University of Technology
基金
国家留学基金(201708515135)
关键词
不锈钢
方管
轴心受压
稳定性
承载力
stainless steel
square tube
axial compression
stability
bearing capacity
