不卸载时侧贴碳纤维布加固连续梁试验研究

为研究不同初始荷载作用下侧贴碳纤维布加固连续梁的受力与变形特性,以及初始荷载对加固效果的影响,对4根钢筋混凝土两跨连续梁（其中1根为未加固连续梁,其余3根为在不同初始荷载下侧贴碳纤维布加固连续梁）进行了试验研究。结果表明：侧贴碳纤维布加固连续梁不仅能提高加固梁的承载力,提高幅度达16%以上;还能提高加固梁的刚度,减少其挠度和裂缝宽度;加固效果受初始荷载影响,初始荷载越小,加固效果越好。

Experimental Studies on Continuous Beams Strengthened with Side Bonded CFRP Sheets When It Is Not Uninstalled

In order to study the stress and deformation characteristics of continuous beams strengthened with side bonded CFRP sheets and the influence of initial load on their reinforcement effect, four two.span continuous reinforced concrete beams are studied in this paper including one un.strengthened beam, three continuous beams strengthened with side bonded CFRP sheets un.der the different initial loads. The results show that the flexural bearing capacity of the reinforced beams side bonded with CFRP sheets can be significantly improved. The flexural bearing capacity of the reinforced beams is increased by more than 16% com.pared with the unreinforced beam. Reinforced continuous beam can increase the stiffness of strengthened beams side bonded with CFRP sheets, reduce the deflection and crack width. The reinforcement effect of the continuous beams strengthened with side bond.ed CFRP sheets is influenced by the initial oad, the smaller the initial oad is, the tter the reinforcement fect is.