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- W652849934 abstract "The technology of fiber-reinforced polymer (FRP) strengthening has matured to a great extent. However, there is always room for performance improvements. In this study, external bonding of glass fiber-reinforced polymer (GFRP) and near surface mounting of regular steel bars is combined to improve the behavior, delay the failure and enhance the economy of the strengthening. E-Glass FRP is selected due to its inexpensive cost and non-conductive properties to shield the near surface mounted (NSM) steel bars from corrosion. On the other hand, the use of NSM bars gives redundancy against vandalism and environmental deterioration of GFRP. An experimental program is conducted in which four T beams are designed and built. The first beam is tested as a control beam failing at about 15 kips. The second beam is strengthened using 5 layers of carbon fiber-reinforced polymer (CFRP), which failed at 25.5 kips by CFRP debonding. The third beam is strengthened using two #5 steel NSM bars and 1 layer of GFRP, both extending to the support. This beam failed at 38.4 kips by GFRP and NSM debonding. The fourth beam is strengthened with the same system used for the third beam. However, the NSM steel bars were cut short covering only 30% of the shear-span while the GFRP was extended to the support. This beam failed at 25.9 kips by GFRP debonding and NSM delamination due to the lack of sufficient development of the NSM steel bars and the shear stress concentration at the steel bar cut off point. Nevertheless, the failure load developed was comparable to 5 layers of CFRP used for beam 2." @default.
- W652849934 created "2016-06-24" @default.
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- W652849934 date "2013-01-01" @default.
- W652849934 modified "2023-09-27" @default.
- W652849934 title "Externally Bonded GFRP and NSM Steel Bars for Enhanced Strengthening of Concrete T-beams" @default.
- W652849934 hasPublicationYear "2013" @default.
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