Mechanical Characteristics of Eccentrically Loaded High Strength Reinforced Concrete Columns

편심하증을 받는 고강도 철근콘크리트 기둥의 역학적 특성

  • 김인식 (정회원, 인천대학교 건축공학과 대학원, 석사) ;
  • 최봉섭 (정회원, (주) 합 건설방재기술단 전문위원, 공학박사) ;
  • 권영웅 (정회원, 인천대학교 건축공학과)
  • Published : 2000.04.01

Abstract

This paper are the mechanical characteristics of eccentrically loaded normal strength and high strength reinforced concrete columns based on the test results. The columns are $120\times120$mmat the mid-section and are haunched at the ends to apply the eccentric loading and prevent premature failure. Variables are concrete strengths(361, 672, 974 kgf/$\textrm{cm}^2$), $\textrm{cm}^2$longitudinal reinforcement ratios (1.98, 3.54, 1 5.53%), spacing of lateral reinforcement (30, 60, 120mm), and eccentricities (24, 40mm). As a results, the main conclusions obtained from the comparison and analysis for the strength tendency, deformation and ductility of high strength reinforced concrete columns with variables are as follows; As the concrete compressive strength concrete and lateral reinforcement increases, the ductility index of high strength reinforced concrete columns decrease, but it increase with the increase of eccentricity and longitudinal reinforcement ratio. The confinement ratio must be greater than 20 percent in order for the level of ductility between high strength reinforced concrete columns and normal strength reinforced concrete columns to be almost equal.

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