Experimental and analytical study on strengthening of reinforced concrete T-beams in shear using steel reinforced grout (SRG)
Author | Wakjira T.G. |
Author | Ebead U. |
Available date | 2020-04-01T06:59:43Z |
Publication Date | 2019 |
Publication Name | Composites Part B: Engineering |
Resource | Scopus |
ISSN | 13598368 |
Abstract | The use of steel reinforced grout (SRG) has emerged as a promising technique for the strengthening and retrofitting of reinforced concrete (RC) structures, however, the experimental evidence on its application for shear-critical RC beams is rather limited. Accordingly, this study focuses on the structural performance of SRG-strengthened RC beams critical in shear. At this aim, an experimental investigation has been conducted on eleven RC T cross-section beams. Eight beams were strengthened with different types of SRG (different for the density, namely 1.57 and 3.14 cords per centimeter) comprised of ultra-high tensile strength steel fabrics, and three, which were unstrengthened, were used as reference specimens. The test parameters investigated were as follows: (a) steel fabric density, (b) bond scheme, and (c) amount of internal shear reinforcement within the critical shear span, SRG/stirrups interaction. The experimental results revealed the high potential of SRG system for the strengthening of shear-critical RC beams. It has significantly improved the shear capacity and deformation characteristics of the strengthened beams. The percentage increase in the load-carrying capacity over the reference beam of up to 71% was observed. In addition, an analytical model based on the simplified modified compression field theory (SMCFT) has been proposed to predict the shear capacity of SRG-strengthened beams. The SMCFT-based model has resulted in an accurate and safe prediction of the shear capacity of the SRG-strengthened beams with an average ratio of Vth/Vex of 0.92 and a standard deviation of 4.07%. - 2019 Elsevier Ltd |
Sponsor | This paper was made possible by NPRP grant # NPRP 9-110-2-052 and UREP grant # UREP24-045-2-013 from the Qatar National Research Fund (a member of Qatar Foundation) and Qatar University grant # QUST-CENG-SPR- 14/15-15 . The authors would also gratefully acknowledge Kerakoll SpA for providing the strengthening material. The findings achieved herein are solely the responsibility of the authors. |
Language | en |
Publisher | Elsevier Ltd |
Subject | Analytical modelling Fabrics/textiles Mechanical testing Shear strengthening Simplified modified compression field theory (SMCFT) Strength |
Type | Article |
Volume Number | 177 |
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Civil & Architectural Engineering [776 items ]