【摘要】 首次通过14个素混凝土和14个钢筋混凝土环状试件外粘碳纤维布加固性能试验,研究了碳纤维布加固混凝土内压圆管的力学性能.试验表明,用碳纤维布加固混凝土内压管可以显著地提高极限承载力,明显地改善构件延性,能够获得良好性能.通过试验研究,提出了实用的承载力计算公式.理论计算结果和试验结果吻合较好,表明计算公式具有较好的适用性,可以为工程应用提供参考.更多还原

【Abstract】 Strengthened with carbon fiber sheets(CFS), fourteen plain concrete circle specimens and fourteen reinforce concrete circle specimens are tested. The performing characteristics and confinement mechanism of these concrete circle specimens were researched and analyzed in detail. The experiment shows that concrete penstock structure reinforced by carbon fiber sheets(CFS) is an effective measure which can increase the ultimate strength and improve stiffness and ductibility of the specimens. A kind of new method for calculating bearing capacity of concrete penstock structure confined with carbon fiber reinforced plastic is put forward through analyzing the experimental results. The results of the new method are in good agreement with the experimental ones. The results can give reference to application.更多还原