Journal of Korean Society of Steel Construction (한국강구조학회 논문집)

Korean Society of Steel Construction (한국강구조학회)
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Allowable Axial Stress Estimation of Corrosion Resistance Steel Tubes for Port and Offshore Structures

항만 및 해양구조용 고강도 내식성 원형강관의 축방향 허용압축응력 산정

  • Oh, Chang Kook (School of Civil and Environmental Engineering, Kookmin University) ;
  • Park, Jang Ho (Dept. of Civil Systems Engineering, Ajou University) ;
  • Bae, Doobyong (School of Civil and Environmental Engineering, Kookmin University)
  • 오창국 (국민대학교, 건설시스템공학부) ;
  • 박장호 (아주대학교, 건설시스템공학과) ;
  • 배두병 (국민대학교, 건설시스템공학부)
  • Received : 2016.05.23
  • Accepted : 2016.06.14
  • Published : 2016.08.27
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Abstract

Corrosion resistance steel has been widely used for port and offshore structures exposed to harsh coastal and oceanic environments, due to lower corrosion rate. New higher strength corrosion resistance steel tubes named STKM500 in KS D 3300 were recently developed by domestic technology and expected to replace foreign ASTM A690 steel. In this study, tensile test results are included to show higher yield and tensile strength of STKM500. Then, buckling test results obtained from 2m, 6m, and 12m steel tubes are demonstrated, based on which an allowable axial compressive stress curve for STKM500 steel tubes is suggested.

해안 및 해양 환경에 노출되어 내부식성이 필수적인 항만 및 해양 구조물용 내식성강 STKM500 강재가 최근 국내의 독자적인 기술로 개발되어 KS D 3300에 신규 등록되었다. 개발된 강재는 일반 구조용 강재에 비해 부식속도가 현저하게 느리고, 지금까지 대표적으로 사용되었던 STK400 및 STK490와 A690 강재보다 경제적이고 고강도여서 미래 수요를 대체할 수 있을 것으로 기대된다. 본 연구에서는 STKM500 강재를 이용한 인장실험을 통해 고강도강의 강도를 측정한 후, 2m, 6m, 12m로 제작된 강관에 대한 좌굴실험을 수행하여 허용압축응력을 산정하였다. 특별히 12m 시험체의 경우, 추가 유한요소해석을 수행하여 결과를 보완하였고, STK500 강관에 대한 축방향 허용 압축응력곡선을 제안하였다.

Keywords

References

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