Bond Behaviour of Beams Reinforced with Near Surface Mounted Carbon Fibre Reinforced Polymer Rods Under Fatigue Loading

Download or read book Bond Behaviour of Beams Reinforced with Near Surface Mounted Carbon Fibre Reinforced Polymer Rods Under Fatigue Loading written by Noran Abdel Wahab and published by . This book was released on 2011 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past decade, extensive research has been conducted on the strengthening of reinforced concrete (RC) structures using externally bonded fibre reinforced polymer (FRP). More recently, near-surface mounted (NSM) FRP reinforcement has attracted an increasing amount of research as well as practical applications. In the NSM method, grooves are first cut into the concrete cover of an RC element and the FRP reinforcement is bonded inside the groove with an appropriate filler (typically epoxy paste or cement grout). The FRP reinforcement is either prestressed or non-prestressed depending on the required level of strengthening. In all cases, the bond between an NSM bar and the substrate material plays a key role in ensuring the effectiveness of NSM strengthening. The present work investigated experimentally the bond behaviour of non-prestressed and prestressed beams reinforced with near surface mounted carbon fibre reinforced polymer (CFRP) bars under monotonic and fatigue loading. Forty concrete beams were cast and tested in seven groups. The test variables considered in this study were: presence of internal steel reinforcement or not, the type of CFRP rod (spirally wound or sand coated) and the prestressing force (non-prestressed or prestressed).