EFFECT OF CRACKS ON INTERFACIAL STRESSES IN RC　BEAMS STRENGTHENED WITH PRE-STRESSED HYBRID　FIBRE HEETS

作者：Y C Guo L J Li P Y Huang F Liu

来源：China,Anhui,Huangshan.

• Hybrid strengthening Interface stress Pre-stressed Crack

A finite element (FE) analysis model of the interracial layer in reinforced concrete (RC) beams strengthened with pre-stressed hybrid carbon fibre and glass fibre sheets (CFS-GFS) is established.Cracks at different locations in the interfacial layer of concrete are considered in numerical modeling.The FE results show that the strengthening pattern is of excellent interface performance and the strength of the fiber sheet could be effectively utilized.The results also indicate that the interfacial shear and normal stresses in the concrete release at the locations of concrete cracks and reach the maximal value near the concrete cracking.The shear and normal stresses near the interracial adhesive layer increase abruptly,and the cracks in the adhesive layer then appear.The axial stresses of hybrid fiber sheet near the cracks decrease locally at the sites of the concrete cracks.

• 出版日期2008
• 单位华南理工大学