Retrofitting of RC Beams with Externally Bonded SIMCON Laminates: A Prospective Retrofit System
The findings of experimental and analytical research on flexural strengthening of RC beams employing externally bonded Slurry Infiltrated Mat CONcrete (SIMCON) laminates are presented in this work. In the laboratory, four reinforced concrete beams with a total span of 3000 mm were cast and tested. Three beams were strengthened at the bottom with bonded SIMCON laminate and tested until failure, while the fourth beam served as a control specimen. The strength, stiffness, ductility ratio, energy absorption capacity factor, laminate-concrete compositeness, and associated failure modes of each beam were all evaluated. The test specimen’s theoretical moment-curvature relationship, as well as the load-displacement response of the strengthened beams and control beam, were predicted using the FEA software ANSYS. According to the results of the experiments, externally attaching SIMCON laminates can result in a significant increase in strength at all load levels. This rise could be attributable to concrete’s tensile cracking strength increasing as a result of confinement. It’s also worth noting that increasing load carrying capacity is only possible if other types of failure aren’t interfering. The numerical (ANSYS) results were compared to the experimental and theoretical results. The reinforced beams had higher flexural strength, flexural stiffness, and composite action till failure, according to the findings.
Department of Civil and Environmental Engineering, College of Engineering, NUST, Sultanate of Oman, Oman.
C. Antony Jeyasehar
Department of Civil and Structural Engineering, Annamalai University, Annamalainagar, 608 002, Tamil Nadu, India.