碳纤维布加固混凝土梁的疲劳性能试验研究

FATIGUE PERFORMANCE OF RC BEAMS STRENGTHENED WITH CFRPSHEETS

本文进行了碳纤维布加固混凝土梁(包括损伤混凝土梁)的疲劳性能试验研究.试验表明:粘贴碳纤维布后混凝土梁的疲劳寿命可提高60%～80%,混凝土梁的疲劳变形减少了40%～60%,混凝土梁的疲劳抗裂性能得到较大提高.因此,粘贴碳纤维布是提高混凝土梁疲劳性能的有效方法,可用于延长损伤混凝土结构的使用寿命.

This paper presents the fatigue performance of RC beams strengthened with carbon-fiber-reinforced plastic sheets （CFRP-sheets） by conducting fatigue test on five RC beams, including three normal RC beams and two damaged RC beams. It is shown that the fatigue life of RC beams strengthened with CFRP-sheets is prolonged by 60%-80%, the fatigue deformation is decreased by 40%-60%, and the anti-crack property is much improved, all of which have a great significance for structures in corrosive environment. The CFRP-sheet is effective for the improvement of fatigue performance of RC beams.