螺旋加劲薄壁方钢管混凝土叠合构件轴压性能及参数影响研究  

Research on nonlinear behavior of concrete filled thin-walled square steel tubular composite members with spiral stiffeners under axial compression

作　　者：王振山[1] 雷震 李浩炜 李哲[1] 韦俊 Wang Zhenshan;Lei Zhen;Li Haowei;Li Zhe;Wei Jun(College of Civil Engineering and Architecture,Xi’an University of Technology,Xi’an 710055,China;College of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215009,China)

机构地区：[1]西安理工大学土木建筑工程学院,陕西西安710055 [2]苏州科技大学土木工程学院,江苏苏州215009

出　　处：《建筑科学》2022年第1期25-32,共8页Building Science

基　　金：国家自然科学基金(51778527)。

摘　　要：薄壁钢管混凝土经济性能优势明显,但受到局部屈曲的影响,变形能力发生严重退化。本文基于螺旋加劲肋新型约束形式,提出了螺旋加劲薄壁方钢管混凝土叠合构件,通过试验研究发现:设置螺旋加劲肋可以较好约束薄壁钢管,增强构件局部抗屈曲能力,承载力和变形能力得到提高。在试验的基础上,对该叠合柱进行数值分析,研究了钢管宽厚比、加劲肋宽厚比和钢筋直径的影响规律,得到减小钢管宽厚比或增大钢筋直径可提高叠合柱承载力,但钢筋与外混凝土需要满足厚度匹配原则,加劲肋宽厚比的改变对构件性能影响不显著。最后,在数值分析的基础上,给出了设计建议。The economic performance of concrete-filled thin-walled steel tube has obvious advantages, but the deformation capacity of concrete-filled thin-walled steel tube is seriously degraded due to the influence of local buckling. Based on the new restraint form of spiral stiffener, the spiral stiffened thin-walled concrete-filled square steel tube composite member is put forward. Through the experimental research, it is found that the spiral stiffener can better restrain the thin-walled steel tube, enhance the local buckling resistance of the member, and improve the bearing capacity and deformation capacity. Based on the test, the numerical analysis of the composite column is carried out, and the influence rules of the steel tube width thickness ratio, the stiffener width thickness ratio and the reinforcement diameter are studied. It is concluded that reducing the steel tube width thickness ratio or increasing the reinforcement diameter can improve the bearing capacity of the composite column, but the reinforcement and the external concrete need to meet the thickness matching principle, and the change of the stiffener width thickness ratio has no significant effect on the member performance. Finally, based on the numerical analysis, the design suggestions are given.

关 键 词：薄壁钢管混凝土 轴压性能 螺旋加劲肋 叠合构件 数值分析 

分 类 号：TU392.3[建筑科学—结构工程]