碳纤维加固方式对钢筋混凝土梁耐久性的影响

Durability of Reinforcement Concrete Beams Strengthened by CFRP

利用电化学腐蚀原理,对长期在氯离子环境下工作的7根不同碳纤维包裹方式的钢筋混凝土梁外加恒定电流,加速其腐蚀速度。对比每根梁在腐蚀过程中的物理力学性能及其变化,分析不同碳纤维包裹方式对钢筋混凝土梁耐久性产生的不同影响并对其机理进行研究。试验表明:碳纤维包裹对提高钢筋混凝土梁耐久性效果较显著,并且全包裹方式的钢筋混凝土梁L-6效果最好。

The principle of electrochemistry is adopted in this durability test. The current is switched on 7 RC beams strengthened by CFRP in different wrapped method. The beams work in corrosive environment for a long time to increase the corrosion rate. Though comprehensive comparison of mechanical property and transformation process, the different effects of the enhancement in durability are analyzed. The test results indicate that the durability of the beams wrapped with CFRP can be improved significantly especially in Beam L-6.