Bond behavior of near surface mounted CFRP rods under temperature cycling. (15th April 2017)

• Record Type: Journal Article
• Authors: Lee, Heeyoung; Jung, WooTai; Chung, Wonseok
• Is Part Of: Engineering structures. Volume 137(2017:Apr. 15)
• Page Start: 67
• Page End: 75
• Publication Date: 2017-04-15
• Subjects: Near surface mounted -- Carbon fiber reinforced polymer rod -- Bond behavior -- Temperature variation -- Filler -- Temperature cycles -- Pullout test; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2017.01.057
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: An overview of pullout tests on NSM strengthening system is presented. A total of 27 pullout tests under various temperature cycles are performed on NSM system. A significant effect of NSM filling material on the bond behavior is found under temperature cycling. Failure load, average bond stress, strains in CFRP bar, and failure mode are examined. Abstract: A near surface mounted (NSM) strengthening technique using CFRP rods has been developed to increase the load-carrying capacity of deteriorating concrete structures compared to that possible with traditional external bonding techniques. This paper investigates the bonding behavior between the CFRP rod and the concrete under temperature cycling when the near surface mounted (NSM) strengthening technique is applied. A total of 27 pullout specimens were fabricated and tested to investigate the effects upon filling materials of applying various numbers of temperature cycles from −15 to 55 °C. The test results included failure load, average bond stress, strains in CFRP bar, and failure mode.