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AuthorWakjira, Tadesse G.
AuthorEbead, Usama
Available date2020-05-14T09:55:46Z
Publication Date2019
Publication NameComposites Part B: Engineering
AbstractThis paper presents an experimental study carried out on the structural performance of shear-critical reinforced concrete (RC) deep beams internally reinforced with two different stirrups configurations; i.e. aligned and unaligned with the fabric-reinforced cementitious matrix (FRCM) strips. The test matrix involved two unstrengthened (reference) beams and twelve strengthened deep beams tested under three-point bending. Three test variables were investigated: (a) the configuration of the internal transverse reinforcement (ITR), (b) the type of FRCM fabric (carbon, glass, and polyparaphenylene benzobisoxazole, PBO), and (c) the strengthening technique (externally bonded, EB, and near-surface embedded, NSE). Experimental results demonstrated an effective application of the FRCM in improving the load capacities (P max ) of deep beams; however, its performance depends on the test variables. The NSE-FRCM provided an inherent anchorage that prevented the premature debonding of the FRCM composite, which was a standard failure mode in the externally bonded FRCM strengthened beams. Finally, a simple strut and tie model (STM) is used to predict the load capacities of the deep beams strengthened with different FRCM systems and resulted in a satisfactory prediction with an average P th /P ex ratio of 1.11 and a standard deviation of 5.7%. - 2019 Elsevier Ltd
SponsorThis paper was made possible by NPRP grant # NPRP 7-1720-2-641 from the Qatar National Research Fund (a member of Qatar Foundation) and by Qatar University grants number QUST-CENG-SPR-13/14 and QUST-CENG-SPR-14/15-15 . The findings achieved herein are solely the responsibility of the authors. Appendix A
PublisherElsevier Ltd
SubjectAnalytical modeling
SubjectFabric-reinforced cementitious matrix (FRCM)
SubjectMechanical testing
SubjectShear strengthening
TitleInternal transverse reinforcement configuration effect of EB/NSE-FRCM shear strengthening of RC deep beams
Volume Number166

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