【摘要】 通过进行普通钢筋混凝土(RC)梁与碳纤维薄板(CFL)增强RC梁的三点弯曲试验,研究粘贴不同厚度的CFL对增强RC梁的破坏模式和承载能力的影响规律.试验发现普通RC梁的破坏以混凝土开裂和主筋屈服为主,CFL增强RC梁的破坏模式与CFL的粘贴厚度有关,包括CFL拉断失效、CFL与混凝土界面剥离、混凝土压碎3种基本模式及其混合模式,弯曲载荷下的极限承载力随CFL的粘贴厚度而增加,与普通RC梁相比提高了12 6%～38 9%.更多还原

【Abstract】 Effect of thickness of carbon fiber laminate (CFL) on failure modes and load carrying capacity of strengthened RC beams is probed by three point bending experiments. The failure procedure of RC beam is dominant by concrete cracking and steel bar yielding. But CFL strengthened RC beams fail with CFL debonding from concrete and then fracture, CFL debon-(ding) from middle span to end and concrete crushing with increasing thickness of bonded CFL. The ultimate load capacity of strengthened RC beams is higher with thicker externally bonded CFL, which increases from 12.6% to 38.9% than that of RC beams.更多还原