Potential side-NSM strengthening approach to enhance the flexural performance of RC beams: Experimental, numerical and analytical investigations
Document Type
Article
Publication Date
1-25-2023
Abstract
The performance of reinforced concrete (RC) beam specimens strengthened using a newly proposed Side Near Surface Mounted (S-NSM) technology was investigated experimentally in this work. In addition, analytical and nonlinear finite element (FE) modeling was exploited to forecast the performance of RC members reinforced with S-NSM utilizing steel bars. Five (one control and four strengthened) RC beams were evaluated for flexural performance under static loading conditions employing four-point bending loads. Experimental variables comprise different S-NSM reinforcement ratios. The constitutive models were applied for simulating the non-linear material characteristics of used concrete, major, and strengthening reinforcements. The failure load and mode, yield and ultimate strengths, deflection, strain, cracking behavior as well as ductility of the beams were evaluated and discussed. To cope with the flexural behavior of the tested beams, a 3D non-linear FE model was simulated. In parametric investigations, the influence of S-NSM reinforcement, the efficacy of the S-NSM procedure, and the structural response ductility are examined. The experimental, numerical, and analytical outcomes show good agreement. The results revealed a significant increase in yield and ultimate strengths as well as improved failure modes.
Keywords
Analytical model, Ductility, Flexural response, Numerical model, S-NSM, Steel bars, Strengthening
Divisions
sch_civ
Funders
University of Malaya High Impact Research Grant (Grant No: D000036-16001)
Publication Title
Structural Engineering and Mechanics
Volume
85
Issue
2
Publisher
Techno-Press
Publisher Location
PO BOX 33, YUSEONG, DAEJEON 305-600, SOUTH KOREA