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피복두께에 따른 초고강도 콘크리트에 매립된 철근의 부착특성

Title
피복두께에 따른 초고강도 콘크리트에 매립된 철근의 부착특성
Other Titles
Bond Characteristics of the Reinforcement Embedded in Ultra High-Strength Concrete according to the Concrete Cover
Author
신성우
Keywords
부착응력; 초고강도 콘크리트; 콘크리트 피복두께; 부착길이; 쪼개짐 파괴; 뽑힘 파괴; Bond Stress; Ultra High-strength Concrete; Concrete Cover; Bond Length; Splitting Failure; Pull-out Failure
Issue Date
2008-10
Publisher
대한건축학회
Citation
대한건축학회논문집 - 구조계, v. 24, No. 10, Page. 45-52
Abstract
An experimental study was conducted to evaluate the bond characteristics of reinforcing bars embedded in ultra high-strength concrete. The Major variables are bar diameter(19㎜, 22㎜, 25㎜) and concrete cover(30㎜, 40㎜, 50㎜). The concrete compressive strength was kept equal strength(150㎫) at each specimen and confining of bar space effect were not taken into account. Nine specimens subjected to uniaxial tension were tested under hypothesis uniform bond stress distribution along the reinforcing bar embedded in concrete. The test results obtained show that the bond strength increases in proportion to compressive strength. It shows that the produced steps of the critical slips on each variable are not constant. And as the bar diameter was smaller and smaller, maximum bond strength was bigger and bigger. Therefore the concrete cover has affected to the bond strength. The Bond strength of specimens with 40㎜ concrete cover has a higher strength than 30㎜. Furthermore, when the ratio of concrete cover(C/db) is below the 2.0, splitting failure should not be disregarded. After comparing with ACI, Zsutty and test results, Zsutty's theory is more appropriate to the experiment result by 1.29 times of the result.
URI
http://www.dbpia.co.kr/Journal/ArticleDetail/NODE01076647http://repository.hanyang.ac.kr/handle/20.500.11754/104977
ISSN
1226-9107
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ARCHITECTURE(건축학부) > Articles
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