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dc.contributor.author류두열-
dc.date.accessioned2020-11-09T08:00:30Z-
dc.date.available2020-11-09T08:00:30Z-
dc.date.issued2019-11-
dc.identifier.citationCONSTRUCTION AND BUILDING MATERIALS, v. 224, Page. 743-761en_US
dc.identifier.issn0950-0618-
dc.identifier.issn1879-0526-
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0950061819317738?via%3Dihub-
dc.identifier.urihttps://repository.hanyang.ac.kr/handle/20.500.11754/155275-
dc.description.abstractIn this study, an attempt was made to investigate the effect of end-hook angle on the rate-dependent bond-slip behavior of novel half-hooked steel fibers embedded in ultra-high-performance concrete (UHPC). For evaluating the effects of the number of plastic hinges and length in the end-hook portion, commercially available hooked steel fiber and short half-hooked steel fiber were additionally used. Three different end-hook angles of 30°, 45°, and 60°, two different fiber inclination angles of 0° and 45° to take into account the random orientation of fibers in the composites, and various loading rates ranging from 0.018 mm/s (static) to 1186 mm/s (impact) were considered. Test results indicated that the most influential factor on the static pullout resistance in terms of the bond strengths and pullout energy was the length in the end-hook portion rather than the number of plastic hinges and end-hook angle if the fibers were pulled out without breakage. Increasing the end-hook angle was effective in enhancing the static and dynamic bond strengths and pullout energies of half-hooked fibers in UHPC given the pullout failure mode, and there was no effect of it if they were ruptured. In addition, the increase in length in the end-hook portion significantly improved the static bond strength and pullout energy in the aligned condition, whereas its effectiveness decreased under the impact loads. The use of half-hooked fiber or shorter length in the end-hook portion was effective in terms of the rate sensitivity to the pullout resistance compared with the commercial hooked fiber or the longer-length one, and the bond strength became more sensitive to the loading rate if the fiber was aligned rather than inclined.en_US
dc.description.sponsorshipThis research was supported by a Grant (19CTAP-C152069-01) from Technology Advancement Research Program funded by Ministry of Land, Infrastructure and Transport of Korean government.en_US
dc.language.isoenen_US
dc.publisherELSEVIER SCI LTDen_US
dc.subjectUltra-high-performance concreteen_US
dc.subjectNovel half-hooked steel fiberen_US
dc.subjectEnd-hook angleen_US
dc.subjectBond-slip behavioren_US
dc.subjectRate sensitivityen_US
dc.titleBond-slip response of novel half-hooked steel fibers in ultra-high-performance concreteen_US
dc.typeArticleen_US
dc.relation.volume224-
dc.identifier.doi10.1016/j.conbuildmat.2019.07.099-
dc.relation.page743-761-
dc.relation.journalCONSTRUCTION AND BUILDING MATERIALS-
dc.contributor.googleauthorYoo, Doo-Yeol-
dc.contributor.googleauthorChoi, Hong-Joon-
dc.contributor.googleauthorKim, Soonho-
dc.relation.code2019041376-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDEPARTMENT OF ARCHITECTURAL ENGINEERING-
dc.identifier.piddyyoo-
dc.identifier.researcherIDAAR-4284-2020-
dc.identifier.orcidhttps://orcid.org/0000-0003-2814-5482-
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ARCHITECTURAL ENGINEERING(건축공학부) > Articles
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