An Experimental Study on the Strengthening Performance of RC Beams Reinforced by NSM CFRP Tendon According to the Surface Treatment of Tendon

Abstract:

This study evaluates the bond performance of the CFRP tendon through pull-out test and investigates experimentally the strengthening performance according to the eventual surface treatment of the tendon on concrete beams strengthened by near-surface mounted (NSM) tendon. The pull-out test revealed that the bond strength was improved by 3 times when surface treatment was applied to the tendon. In addition, similar improvement of the bond performances was observed regardless of the execution time of the surface treatment being manually on site or at the factory during the production of the tendon. The flexural test showed that the surface treatment of the CFRP tendon improved the strengthening performance by 13%. Consequently, when using the CFRP tendon featured by low bond strength, it appears that structural reinforcement can be improved by executing beforehand surface treatment of the tendon on site.

• Periodical: Key Engineering Materials (Volume 730)
• Pages: 435-439
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.730.435
• Online since: February 2017
• Authors: Woo Tai Jung*, Moon Seoung Keum, Jae Yoon Kang, Jong Sup Park
• Keywords: CFRP, NSM, Prestressed, Strengthening, Surface Treatment

References

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DOI: 10.2139/ssrn.3073985

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