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该文推导了在轴压和弯矩共同作用下具有初始几何缺陷且拉压侧外表面粘贴碳纤维片后的H形截面构件绕强轴失稳时极限荷载的计算公式。通过采用弹塑性有限元法,结合非线性屈曲理论,进行了受初始几何缺陷影响的碳纤维增强钢构件在压弯荷载共同作用下的屈曲分析,并得到极限承载力的数值解。将有限元结果与Je ek法得到的解析解进行比较,可以发现两种结果吻合较好。计算结果表明,当构件两端给定的弯矩超过某一数值后,具有缺陷的碳纤维增强H型钢构件的极限承载力高于完善的H型裸钢构件的极限承载力,表明了碳纤维作为增强材料的有效性和可用性。
This paper deduces the formula for calculating the ultimate load of an H-section member with its initial geometric defects and the carbon fiber sheets stuck to the outer surface of the tension-compression side in the event of instability of the strong axis under the combined action of axial compression and bending moment. By using the elasto - plastic finite element method and the theory of nonlinear buckling, the buckling analysis of carbon fiber reinforced steel members subjected to the initial geometric imperfections subjected to the compression and bending loads was carried out, and the numerical solution of the ultimate bearing capacity was obtained. Comparing the finite element results with the analytic solutions obtained by the Je ek method, we find that the two results are in good agreement. The calculated results show that the ultimate bearing capacity of defective carbon fiber reinforced H-section members is higher than that of perfect H-shaped bare steel members when the given bending moment at both ends of the member exceeds a certain value, indicating that the carbon fiber as an enhancement Material availability and availability.