摘要
以碳纤维布加固圆形钢管短柱轴压试验为依托,综合考虑纤维布的力学性能,提出一种新的轴压CFRP钢管的数值模拟方法。对纤维束沿环向和双向粘贴的加固试件进行有限元模拟,进而针对试验及有限元结果,对CFRP钢管的加固机理进行力学分析。结果表明,环向纤维通过拉力提供环向约束以限制钢管屈曲变形的发展;轴向纤维在加载之初为受压状态,并可承担部分压力,随着屈曲变形发展,部分轴向纤维转变为受拉状态,进而对试件变形起到限制作用,提高了构件的延性。
Based on the test of CFRP strengthened round steel tubular short columns under axial compression,a new numerical simulation method of CFRP steel tube under axial compression is carried out by overall consideration of mechanical properties of fiber cloth. The finite element modelling is conducted for the test specimens pasted along loop and bothway of fibre bundle. According to the test and the finite element results,the mechanical behavior of the reinforcement mechanism of CFRP is analysed. The results show that the hoop fiber layers restrict the development of buckling deformation of steel tube by providing the circumferential tensile force. The longitudinal fiber layers are in compression state at the beginning of loading and can undertake partial pressure. With the development of buckling deformation,some of the longitudinal fiber turn into tension state. Accordingly,the development of deformation is restricted,so the ductility of the test specimens is improved.
出处
《四川理工学院学报（自然科学版）》
CAS
2015年第5期74-80,共7页
Journal of Sichuan University of Science & Engineering(Natural Science Edition)
关键词
碳纤维布加固圆形钢管
轴压稳定性
有限元
纤维方向
CFRP strengthened round steel tube
axial compression stability
the finite element
fiber direction
