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Shear Strengthening Effect on Reinforced Concrete Beams Strengthened by Vertical Slit Type Steel Plates  

Lee, Choon-Ho (에이아이지 건축구조연구소)
Kwon, Ki-Hyuk (서울시립대학교 건축공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.13, no.1, 2009 , pp. 195-204 More about this Journal
Abstract
Application of steel plates is one of widely used methods for shear strengthening of reinforced concrete beams that are insufficient of shear capacity. While the existing method applying solid steel plates provides good shear rigidity, however, it is concerned by brittle bond failure patterns, inefficient material usage, and low constructability. The use of strap type steel plates has also shortcomings of low strenthening effect due to small interface bonding area and ununified behavior between plates and main body. Therefore, this study aims to introduce the shear strengthening method using slit type steel plate, which can solve out the problems aforementioned, and to verify its strengthening effects on shear capacity. A total of 13 specimens strengthened by slit type steel plates were fabricated with primary test parameters of plate width, slit spacing, and plate thickness. The test results from this study were also compared to those from the existing research on RC beams strengthened by strap type steel plates, and the strengthening effects on shear capacity of specimens having bonded slit type steel plates were quantitatively analyzed. The test results showed that the RC beams strengthened by slit type steel plates had greater shear capacities than those with strap type steel plates, which is considered to be the effects of improved composite behavior and larger interface bonding area in the RC beams strengthened by the slit type steel plates.
Keywords
Ductility; Shear capacity; Shear Strengthening effect; Slit type; Strap type;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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