Shear behavior of reinforced concrete beams strengthened with a 45° inclined MSS technique: Parametric study of shear Span-to-depth ratio and beam height

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dc.contributor.authorAksoylu, Ceyhun
dc.contributor.authorBaş, Fadimana
dc.contributor.authorUysal, Yusuf
dc.contributor.authorBasaran, Bogachan
dc.contributor.authorArslan, Musa Hakan
dc.contributor.authorÖzkılıç, Yasin Onuralp
dc.date.accessioned2026-02-03T11:53:40Z
dc.date.available2026-02-03T11:53:40Z
dc.date.issued2025
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractCurrent methods for strengthening reinforced concrete beams with insufficient shear capacity have structural and practical limitations. This study experimentally investigated the performance of a 45° inclined Mechanical Steel Stitches (MSS) technique under four-point loading. 17 beams (3 reference, 14 strengthened) with shear span-to-depth ratios (a<inf>v</inf>/d = 2.5, 3.3, 4.9) and section heights (250, 360 mm) were tested, while a group with a<inf>v</inf>/d = 3.3 and 250 mm height was adopted from the literature for comparison. Beams were evaluated in terms of maximum load, displacement, energy dissipation, stiffness, ductility, and failure modes. Results showed that MSS was highly effective, particularly at low a<inf>v</inf>/d ratios. The maximum capacity increase reached 86.2% for a<inf>v</inf>/d = 2.5, decreasing to 50.6% at a<inf>v</inf>/d = 3.3 and 14.9% at a<inf>v</inf>/d = 4.9, where diagonal cracks intersecting MSS anchor holes limited the contribution. The optimum MSS spacings were determined as d/2.5 for a<inf>v</inf>/d = 2.5 and d/5 for a<inf>v</inf>/d = 3.3 and 4.9. Increasing beam height from 250 to 360 mm reduced MSS effectiveness by 5.4–27.5%. All reference beams failed in brittle diagonal tension, while strengthened beams exhibited splitting (43%) or combined diagonal tension–splitting (29%). Decreasing MSS spacing shifted failure from diagonal tension to splitting. Overall, the inclined MSS technique proved effective and practical for strengthening shear-deficient beams, offering guidance for design and application. © 2025 Taylor & Francis Group, LLC.
dc.identifier.doi10.1080/15376494.2025.2588660
dc.identifier.issn1537-6494
dc.identifier.scopus2-s2.0-105025220067
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1080/15376494.2025.2588660
dc.identifier.urihttps://hdl.handle.net/20.500.12428/34285
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherTaylor and Francis Ltd.
dc.relation.ispartofMechanics of Advanced Materials and Structures
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_Scopus_20260130
dc.subjectav/d ratio
dc.subjectmechanical steel stitches
dc.subjectreinforced concrete beams
dc.subjectshear beam
dc.subjectshear strengthening
dc.titleShear behavior of reinforced concrete beams strengthened with a 45° inclined MSS technique: Parametric study of shear Span-to-depth ratio and beam height
dc.typeArticle

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