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contributor authorLinh Van Hong Bui
contributor authorTetsushi Ohno
contributor authorNorihiko Kurihara
contributor authorHidehiko Sekiya
date accessioned2024-12-24T10:19:23Z
date available2024-12-24T10:19:23Z
date copyright10/1/2024 12:00:00 AM
date issued2024
identifier otherJCCOF2.CCENG-4534.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4298705
description abstractThis study presents the results of an experimental investigation of fatigue shear behavior in reinforced concrete (RC) beams strengthened with fiber-reinforced polymer (FRP) bars using the embedded through-section (ETS) technique. Thirteen ETS-FRP-strengthened beams were tested under two scenarios of medium-cycle fatigue (MCF) and high-cycle fatigue (HCF). The design variables were the number of stirrups, the FRP type, and the FRP size, and their effect on the fatigue characteristics of ETS-retrofitted RC beams was examined. The displacement and strain in flexural and shear reinforcement in the ETS-strengthened beams increased during the initial cycles and tended to stabilize during the rest of the fatigue process. Under MCF and HCF conditions, the fatigue stress ranges for longitudinal steel with ETS-FRP-strengthened beams satisfy the limits mandated in the American Association of State Highway and Transportation Officials code. Similar to previous studies, the maximum strain of 2,000 µɛ in the ETS-FRP strengthening systems can be considered the strain limit for the fatigue design of ETS-FRP-retrofitted beams. The use of glass FRP bars with a narrow spacing substantially extended the fatigue life of ETS-strengthened beams (to more than 3,000,000 cycles) compared with unstrengthened beams and beams retrofitted with carbon FRP bars. Conversely, a large number of stirrups reduced the contribution of ETS-FRP strengthening. The strength of the retrofitted beams increased with increasing FRP elastic modulus and bar diameter. Failure of ETS-FRP-strengthened beams under fatigue tests and static tests occurred in a safe and ductile manner because no rupture of the steel stirrups or the FRP bars occurred, and no early FRP debonding was observed.
publisherAmerican Society of Civil Engineers
titleExperimental Investigation of Fatigue Shear Behavior of RC Beams Strengthened with FRP Bars Using Embedded Through-Section Technique
typeJournal Article
journal volume28
journal issue5
journal titleJournal of Composites for Construction
identifier doi10.1061/JCCOF2.CCENG-4534
journal fristpage04024037-1
journal lastpage04024037-23
page23
treeJournal of Composites for Construction:;2024:;Volume ( 028 ):;issue: 005
contenttypeFulltext


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