碳纤维加固对海工钢筋混凝土结构锈胀的约束作用研究  

Research on the restriction effect of corroded expansion of marine reinforced concrete structures strengthened by CFRP

作　　者：王友元[1] 苏林王[1] 李国豹[1] 

机构地区：[1]中交四航工程研究院有限公司水工构造物耐久性技术交通行业重点实验室,广东广州510230

出　　处：《水运工程》2009年第10期47-51,共5页Port & Waterway Engineering

基　　金：中国交通建设集团重大科技研发资助项目(JK-03-03);交通部<港口水工建筑物修补加固技术规范>制定专题研究项目

摘　　要：针对海工钢筋混凝土结构碳纤维加固,通过对不同粘贴方式加固构件的室内加速腐蚀对比试验,研究碳纤维复合材料加固海工钢筋混凝土结构的内在增强机理,结果表明碳纤维布加固对其锈胀裂缝具有显著的限制和约束作用:一方面,碳纤维布相对于混凝土具有很强的抗变形能力,加固后的复合受力体系能够平衡大部分锈胀力,从而抑制锈胀裂缝的进一步开展;另一方面,外贴碳纤维复合材料能有效阻止海水中氯离子的渗透。因此,碳纤维加固能有效地提高海工钢筋混凝土结构的耐久性能,这也是将碳纤维复合材料应用于海工钢筋混凝土结构加固的又一技术优势所在。Based on the accelerated corrosion tests results of marine reinforced concrete structures strengthened by CFRP in different ways, the internally enhancing mechanism of strengthening is studied. The result shows that the CFRP reinforcement has a significant limitation and restriction effect on the corroded cracks expansion of marine concrete structures. On one hand, the deformation resistant capacity of CFRP is much better than concrete, and after strengthening the composite force bearing system can balance most of the corrosion expansion force so as to restrain further expansion of corrosion cracks. On the other hand, the CFRP can prevent effectively the penetration of chloride ion. Therefore, the CFRP reinforcement can improve effectively the durability of marine reinforced concrete structures, which is another vantage technology of CFRP used in marine reinforced concrete structures reinforcement.

关 键 词：碳纤维布 海工钢筋混凝土结构 加速腐蚀 锈胀裂缝 钢筋锈蚀量 约束作用 

分 类 号：TV431[水利工程—水工结构工程] TV47