Akademik Veri Yönetim Sistemi
3rd International fib Congress and Exhibition, Incorporating the PCI Annual Convention and Bridge Conference 2010, Washington, Amerika Birleşik Devletleri, 29 Mayıs - 02 Haziran 2010
Poor quality of concrete and lack of sufficient transverse reinforcement are among the most common deficiencies for many existing reinforced concrete structures. These deficiencies may generally result with low axial strength and ductility of vertical structural members, which are of primary importance during seismic events. Retrofitting this type of poorly constructed structural members with external FRP (fiber reinforced polymer) sheet jacketing has been shown to provide remarkable enhancement in both axial strength and deformability. In this study, a preliminary experimental work is carried out for obtaining a tailored stress-strain behavior for glass FRP confined low strength concrete by adjusting the slope of the second branch of the stressstrain relationship. This adjustment is obtained by placing a thin layer of low strength cement based mortar between concrete surface and glass FRP sheets. For this purpose, totally ten cylinder specimens are tested under concentric compression. The enhancements in compressive strength and deformability, and obtained axial stress-axial strain and axial stress-transverse strain relationships are presented as well as the descriptions of the failure mechanisms of specimens. Furthermore, the obtained behavior of the tested specimens is explained by using a simple analytical approach.