论文部分内容阅读
对圆截面钢管短柱外部粘贴的碳纤维增强复合材料(CFRP)进行设计和试验。CFRP能对构件进行加强,除了质量轻,高强CFRP片还能起高度约束作用,从而延缓薄钢壁的屈曲。对10根外贴横向及纵向CFRP片的冷弯型钢管短柱进行轴压试验。结果表明:通过纤维增强,钢管轴向承载力得到提高。评价钢材屈服强度、横向纤维弹性模量、纤维数量及布置对构件的加强效果。基于现有钢柱设计规范,计算可反映组合型钢-CFRP管状短柱承载力的设计曲线。结果表明:在使用纤维增强复合材料(FRP)加强或改进管状柱时,采用这些曲线很方便。
Design and test of carbon fiber reinforced composite material (CFRP) attached to the short section of circular steel tube short columns. CFRP can strengthen the components, in addition to light weight, high strength CFRP sheet can also play a high degree of restraint, thereby slowing the buckling of the thin steel wall. The axial compression test of 10 cold-formed steel tubular stubs with transverse and longitudinal CFRP sheets attached to them was carried out. The results show that the axial bearing capacity of steel pipe is enhanced by fiber reinforcement. Evaluation of steel yield strength, transverse fiber elastic modulus, the number of fibers and arrangement of components to enhance the effect. Based on the existing steel column design code, the design curve that reflects the bearing capacity of the tubular steel-CFRP tubular short column can be calculated. The results show that these curves are convenient when using fiber reinforced composites (FRP) to reinforce or refine tubular columns.