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An Experimental Study on the Structural Behavior of Stub Columns with HSA800 High-strength Steels under Eccentric Loads

편심하중을 받는 건축구조용 고강도 강재(HSA800) 단주의 거동에 관한 실험적 연구

  • Lee, Kangmin (Department of Architectural Engineering, ChungNam National University) ;
  • Lee, Myung Jae (Department of Architectural Engineering, Chung-Ang University) ;
  • Oh, Young Suk (Department of Architectural Engineering, Daejeon University) ;
  • Oh, Keunyeong (Department of Architectural Engineering, ChungNam National University) ;
  • Hong, Sungbin (Department of Architectural Engineering, ChungNam National University)
  • Received : 2014.05.20
  • Accepted : 2014.06.25
  • Published : 2014.08.27

Abstract

Recently, high performance steels have been utilized to structural materials in buildings and bridges with the demand for high-rise and long-span of main structures. In this paper, flexure-compression members with the high-strength steel were experimentally evaluated to satisfy the design criteria when stub columns fabricated with HSA800 steel were eccentrically loaded. This test was conducted on box-shaped and H-shaped steels stub columns with high-strength steel to verify the P-M interaction of members subjected to combined forces according to axial load ratios. The results showed that all specimens were satisfied the requirements of Korean Building Code(KBC2009) for using of structural members.

본 연구에서는 고강도강재(HSA800)의 단주 편심압축실험을 통해 휨-압축 부재의 강도를 평가하였다. 편심압축실험은 축력비에 따라 휨-압축의 조합력을 받는 부재의 P-M 상관관계를 알아보기 위해 HSA800강재의 각형강관과 H형강을 대상으로 실험을 수행하였으며, 가력 편심거리를 조정하여 다양한 P-M 조합에 대해 강도평가 실험을 수행하였다. 실험결과 실험최대 평균응력은 국부좌굴에 의한 최대내력이 결정된 실험체에 대해서는 판폭두께비가 증가함에 따라 감소하는 경향을 보였다. 발현강도의 여유는 축력이 낮을수록 상대적으로 휨강도에 대해 큰 마진을 보이고 있었고, 실험체 모두 현행 설계기준의 P-M 상관관계를 안전측으로 충족하였다.

Keywords

References

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