摘要
引入折减系数α,考虑初始缺陷的影响,采用理论分析与有限元计算相结合的方法,研究有初始缺陷的薄壁钢管混凝土的宽厚比,通过局部屈曲判定曲线得出薄壁钢管的折减系数α在0.87以上。研究表明,初始缺陷使得薄壁钢管混凝土管壁的局部屈曲提前发生,并且随着钢管屈服强度的提高,这种不利影响越趋明显。
Considering the influence of initial imperfection, introducing the reduction factor of Through theoretical and finite element analysis, flakiness ratio of concrete-filled thin-walled steel tubes （CFTST） with initial imperfection was studied. Through the local buckling of thin-walled steel tube, we can get that the reduction factor is above 0. 87. The studies show that CFTST with initial imperfection are more prone to local buckling than perfect ones, and this tendency is more obvious with the yield increasing.
出处
《低温建筑技术》
2011年第9期36-38,共3页
Low Temperature Architecture Technology
关键词
初始缺陷
薄壁钢管混凝土
局部屈曲
initial imperfection
concrete-filled thin-walled steel tube
local buckling strength
