纤维增强塑料在桥梁加固工程中的应用

Fiber Reinforced Plastic for Strengthening Deficient Bridge Structures

交通设施是保证国民经济和社会健康发展的重要基础设施 ,钢筋混凝土桥梁作为交通设施的重要组成部分 ,起到至关重要的作用。由于种种原因 ,部分钢筋混凝土桥梁出现承载力不足。纤维增强塑料 (简称FRP)加固钢筋混凝土桥梁结构是一个新兴课题。介绍了 FRP加固用材料及技术特点 ,根据不同的 FRP加固工艺 ,给出了几个典型工程实例。工程应用表明 ,FRP加固是具有良好发展前景的加固方法。

National growth and economic prosperity are closely related to the adequacy of the transportation infrastructure. Reinforced concrete bridges, in particular, are considered one of the critical components of the transportation infrastructure. At present, many of these bridges are structurally and functionally deficient. Current studies indicate that the use of fiber reinforced plastic (FRP) for strengthening RC deficient structures is expected to increase greatly in the next few years. FRP material and technical characteristics for strengthening are introduced in the paper. Some typical engineering examples are discussed. Engineering application indicates that the FRP reinforcement to strengthen bridge structures is becoming an increasingly popular reinforced technique.