Research on Rc Beams Strengthened with near-Surface Mounted Helical Rib Bar

Abstract:

Four concrete beams were cast with normal reinforcement bars. According to different the amount of mounted strengthening, grooves are opened in the concrete cover of tensile region in the concrete beams. Helical Rib Bar（HRB）is inserted in the grooves that is filled with resin. Flexural experimental results indicate that the limit bearing capacity, rigidity and crack resistance of beams strengthened with HRB are all improved obviously. With the increase in the amount of mounted strengthening, the limit bearing capacity of the strengthened beam is improved obviously. In comparison with the contrastive beam, the limit bearing capacity of the beam strengthened with one near-surface mounted HRB is increased by 20.91%, and that of the beam strengthened with two near-surface mounted HRB is increased by 54.55%，and that of the beam strengthened with three near-surface mounted HRB is increased by 90.91%.

• Periodical: Applied Mechanics and Materials (Volumes 90-93)
• Pages: 1757-1760
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.90-93.1757
• Online since: September 2011
• Authors: Zhen Hua Ren, Xian Tao Zeng, Han Long Liu
• Keywords: Concrete Beam, Helical Rib Bar, Near-Surface Mounted (NSM), Strengthened

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