采用理论推导与实验验证的方法‚探讨碳纤维薄板厚度对增强钢筋混凝土（RC） 梁破坏模式的影响．文中首先通过理论分析‚提出了增强 RC 梁破坏模式的判断方法及公 式‚随后据此对4组试验梁的破坏模式进行了推定．理论推定结果表明‚碳纤维薄板增强 RC 梁的破坏模式随着碳纤维薄板厚度的变化而改变‚4种破坏模式（纤维薄板拉断、界面 剥离或钢筋保护层剥离、混凝土压碎和混合破坏模式）分别对应于碳纤维薄板的某一厚度 区间．文中最后通过实验验证了上述推定结果。

In this paper‚by means of theoretical derivation and experimental verification‚the effect of the thickness of carbon fiber laminate （CFL） on the failure mode of the strengthened RC （Reinforced Concrete） beam was investigated．In the investigation‚a method and corresponding equations were proposed to estimate the fa-i lure modes of4 groups of beams．The theoretically estimated results show that the failure mode of the RC beam strengthened with CFL changes with the thickness of CFL and that 4kinds of failure modes‚namely‚the tension fracture of CFL‚the debonding fracture of interface or the cover concrete separation‚the concrete crush and the mixed failure mode‚are respectively related to the4thickness regions．All these estimated results were finally verified by some tests．