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Slip Characteristics of Reinforced Concrete Beams to Corroded Steel State

철근부식상태에 따른 철근콘크리트 보의 슬립특성

  • 권영웅 (인천대학교 건축공학과) ;
  • 최봉섭 ((주)합건설방재기술단, 인천대·중앙대) ;
  • 정용식 ((주)한진중공업)
  • Published : 1999.12.01

Abstract

Reinforced concrete structures are constructed under the basic assumption of perfect bonding between steel and concrete. The corrosion of steel in the reinforced concrete beams results in the excessive cracks and gradual deterioration of concrete. This paper are concerned about the slip characteristics of reinforced concrete between steel and concrete. The accelerated test by external power supply was conducted with the three corrosion rates in the laboratory. As a result, it was obtained as follows: (1) the yield strength of steel was reduced according to corrosion states. (2) the equivalent steel area should be considered for detailed analysis. (3) According to the use of corroded steel or not, slip amounts between concrete and steel in test beams increased as the corrosion rate increased. These results can be explained from the bond loss between concrete and steel in test beams.

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