Shear strengthening of reinforced concrete deep beams using near-surface mounted hybrid carbon/glass fibre reinforced polymer strips
المؤلف | Ibrahim, Mohamed |
المؤلف | Wakjira, Tadesse |
المؤلف | Ebead, Usama |
تاريخ الإتاحة | 2023-01-29T09:23:42Z |
تاريخ النشر | 2020 |
اسم المنشور | Engineering Structures |
المصدر | Scopus |
الملخص | This study investigated the efficacy of near surface mounted (NSM) hybrid carbon/glass fibre reinforced polymer (FRP) strips for strengthening of shear-deficient reinforced-concrete (RC) rectangular deep beams. A specific focus was the interaction of FRP with steel stirrups, which were arranged in both aligned and unaligned configurations for different FRP and stirrup volume fractions. Five unstrengthened reference beams and seven strengthened beams were tested. The NSM-FRP increased the beam shear strength up to 55.8%, alleviated debonding between concrete and strengthening material, and enhanced the deformational characteristics of the strengthened beams. The FRP/stirrups interaction also affected the contribution of NSM-FRP to the shear strength of the beams. Moreover, this study proposes a model based on the modified compression field theory (MCFT) to determine the shear capacity of the beams. The proposed formulation accounts for the FRP/stirrups interaction, which is not considered in the currently available models for the NSM-FRP strengthened RC beams. The average theoretical to experimental shear capacities ratio was 0.96 with a standard deviation of 3.19%. 2020 Elsevier Ltd |
راعي المشروع | This 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 QUST-CENG-SPR-14/15-15 and QUST-CENG-SPR-14/15-16 . The authors would also like to acknowledge Qatar University for the Graduate Assistantship, students code GTRA-CENG-2019-16 and GTRA-CENG-2019-09. The findings achieved herein are solely the responsibility of the authors. |
اللغة | en |
الناشر | Elsevier |
الموضوع | Analytical modelling Deep beams Fibre FRP/stirrups interaction Hybrid carbon/glass NSM-FRP Shear strengthening Strength |
النوع | Article |
رقم المجلد | 210 |
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