Bond resistance of prestressed CFRP strips attached to concrete by using EBR and EBROG strengthening methods
نویسندگان
چکیده
Strengthening reinforced concrete (RC) beams and slabs with prestressed carbon fiber-reinforced polymer (CFRP) composites is of high interest since the FRP material can be used more efficiently. Developing a non-mechanical strengthening system entails evaluating bond resistance to substrate. To increase CFRP strips substrate, new method called externally bonded reinforcement on grooves (EBROG) was investigated compared conventional (EBR) method. For this purpose, prestress force-release tests were performed study behavior concrete. In-plane out-of-plane deformations measured through three-dimensional digital image correlation (3D DIC) system. All carried out at Empa Structural Engineering Laboratory in Dübendorf, Switzerland. Experimental results showed that average resistances EBR EBROG joints experiments 34.4 81.4 kN, respectively; indicating an increased for factor 2.4. By using method, failure plane incorporated massive crack development bulk therefore, fracture energy significantly. Besides, it shown experienced large deformations, emphasizing fact should treated as mixed shear/tension mode future studies.
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................................................................................................................................. i Dedication........................................................................................................................... iii Acknowledgements............................................................................................................. i...
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ژورنال
عنوان ژورنال: Construction and Building Materials
سال: 2021
ISSN: ['1879-0526', '0950-0618']
DOI: https://doi.org/10.1016/j.conbuildmat.2020.121209