Journal of Korean Society of Steel Construction (한국강구조학회 논문집)

Korean Society of Steel Construction (한국강구조학회)
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Alternative Design of Mega Structural Members of a Super-tall Building using 800MPa Grade High-performance Steel Plate

800MPa급 고성능 강재 적용한 초고층 메가 부재 대안설계

  • Cho, So Hoon (Chang Minwoo structural consultants) ;
  • Kim, Do Hwan (Building Materials and Structure Research Group, POSCO Steel Solution Center) ;
  • Kim, Jin Won (Building Materials and Structure Research Group, POSCO Steel Solution Center) ;
  • Lee, Seung Eun (Building Materials and Structure Research Group, POSCO Steel Solution Center) ;
  • Kim, Jin Ho (Building Materials and Structure Research Group, POSCO Steel Solution Center)
  • 조소훈 (창민우 구조) ;
  • 김도환 (POSCO 철강솔루션센터 건축건자재연구그룹) ;
  • 김진원 (POSCO 철강솔루션센터 건축건자재연구그룹) ;
  • 이승은 (POSCO 철강솔루션센터 건축건자재연구그룹) ;
  • 김진호 (POSCO 철강솔루션센터 건축건자재연구그룹)
  • Received : 2014.04.14
  • Accepted : 2014.07.02
  • Published : 2014.08.27
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Abstract

HSA800 is a new high strength steel (HSS) plate for building structures developed by POSCO and RIST in 2011. It has upper and lower bounds for yield ($F_y$) and tensile ($F_u$) strength as of 650-770MPa and 800-950MPa, respectively, with yield ratio ($F_y/F_u$) limit as of 0.85 which make steel quality more reliable and enhance the seismic resistance of structures. As made by TMCP, it has a good weldability without increasing carbon percentage. The objective of this study is to provide alternative design of mega-structural members of the Lotte World Tower (555m, 123 story), a first super-tall building in Korea, using HSS considering structural safety, constructability, and cost-effectiveness. Steel outrigger trusses, belt-trusses and steel exterior columns were selected and analyzed to evaluate the structural performance between original and alternative designs using HSS. The results show that HSS can be applied to the members which do not affect lateral stiffness of a building and, in this study, approximately 1100tons of steel were saved. It implies that HSS can save overall construction costs - manufacturing, delivery, and erection costs - by reducing mega structural member size. HSA800 was very first applied to the Lotte World Tower based on the results of this study.

HSA800은 건축구조용 고성능 강재로서 KS규격에 항복강도 650MPa-770MPa, 인장강도 800MPa-950MPa를 가지며 항복비(항복강도/인장강도) 또한 0.85이하로 제한되어있으며 TMCP 기법으로 제조되어 뛰어난 용접성을 나타내는 특징이 있다. 본 연구에서는 국내 최초의 초고층 빌딩인 롯데월드타워의 메가 구조부재를 대상으로 고강도 강재 적용시 구조물 안전성의 변동사항 및 시공성 개선 등을 검토하여 경제적 설계를 위한 대안을 제시하는 것을 목적으로 한다. 대상 부재로는 아웃리거 코어월 매립부 상/하현재, 벨트트러스, 외곽 철골기둥이 선정되었다. 원설계 단면을 등가 도강도 강재 단면으로 환산하여 두께를 결정한 후 중력저항모델, 횡력저항모델, 연쇄붕괴 모델을 구조해 석시뮬레이션을 통하여 성능을 비교 평가하였다. 그 결과 횡강성에 영향을 주지 않는 부재는 고강도 강재 적용이 가능하며 원설계 대비 약 1100톤의 물량 절감 효과가 있었다. 따라서, 고강도 강재를 사용하면 부재 두께를 줄일 수 있으므로 부재 제작성 및 시공성이 향상될 수 있을 것으로 기대된다.

Keywords

References

  1. Choi, H., Ho, G., Joseph, L., and Emborg, M. (2012) Outrigger Design for High-rise buildings, CTBUH technical guide, USA.
  2. 日本國土交通大臣(2006) 建築構造用 高性能 780N/mm2 鋼材 BT-HT630B, BT-HT630C 認定 (MSTL-0175), 日本國土交通省. (Japan Ministry of Land, Infrastructure, Transport and Tourism (2006) Certification of 780N/mm2 High-strength Steel for Building Structures, BT-HT630B, BT-HT630C (MSTL-0175) (in Japanese)).
  3. 日本國土交通大臣 (2007) 建築構造用 低降伏比 780N/mm2 鋼材 JFE-HITEN780TB, JFE-HITEN780TC 認定 (MSTL-0205), 日本國土交通省. (Japan Ministry of Land, Infrastructure, Transport and Tourism (2007) Certification of Low Yield Ratio 780N/mm2 Steel for Building Structures, JFE-HITEN780TB, JFE-HITEN780TC (MSTL-0205) (in Japanese)).
  4. 日本國土交通大臣 (2008) 建築構造用 1,000N/mm2級 熱間延鋼材（鋼板）SSS1000 認定 (MSTL-0232), 日本國土交通省. (Japan Ministry of Land, Infrastructure, Transport and Tourism (2008) Certification of 1,000N/mm2 Grade Hot-rolled Steel (Plate) for Building Structures, SSS1000 (MSTL-0232) (in Japanese)).
  5. 日本國土交通大臣 (2009) 建築構造用 800N/mm2級 熱間延鋼材 (鋼板) SSS800 認定 (MSTL-0271), 日本國土交通省. (Japan Ministry of Land, Infrastructure, Transport and Tourism (2009) Certification of 800N/mm2 Grade Hotrolled Steel (Plate) for Building Structures, SSS800 (MSTL-0271) (in Japanese)).
  6. Yoshida, Y., Obinata, T., Nishio, M., and Shiwaku, T. (2009) Development of High-Strength (780N/mm2) Steel for Building Systems, International Journal of Steel Structures, Vol.9, No.4, pp.285-289. https://doi.org/10.1007/BF03249502
  7. 기술표준원(2011) 건축구조용 고성능 압연강재 (KS D 5994), 산업통상자원부. (Korean Agency for Technology and Standards (2011) High-performance Rolled Steel for Building Structures (KS D 5994), Korean Ministry of Trade, Industry & Energy (in Korean)).
  8. 하태휴, 김진호, 이승은, 정경수, 정미영 (2010) 800MPa급 교량용 강재의 소재, 용접 특성 및 건축구조용 고성능 강재의 개발 전략, 2010년도 학술대회발표집, 한국강구조학회, pp.353-354. (Ha, T.H., Kim, J.H., Lee, S.E, Chung, K.J., Jung, M.Y. (2010) Material and welding properties of 800MPa grade steel for bridges and Development strategies of highperformance steel for buildings, Proceedings of Annual Conference Korean Society of Steel Construction, KSSC, pp.353-354 (in Korean)).
  9. 김도환, 이승은, 김진호, 하태휴, 유승호(2012) 건축구조용 고성능 강재 HSA800 소재 성능 평가, 2012년도 학술대회발표집, 한국강구조학회, pp.267-268. (Kim, D.H., Lee, S.E, Kim, J.H., Ha, T.H., and Yu, S.H. (2012) Material Tests of the HSA800 - the High Performance Steel for Building Structures, Proceedings of Annual Conference Korean Society of Steel Construction, KSSC, pp.267-268 (in Korean)).
  10. Lee, C., Han, K., Uang, C., Kim, D., Park, C., and Kim, J., (2013) Flexural Strength and Rotation Capacity of I-Shaped Beams Fabricated from 800-MPa Steel, Journal of Structural Engineering, Vol.139, No.6, pp.1043-1058. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000727
  11. 이철호, 김대경, 한규홍, 박창희, 김진호, 이승은, 김도환 (2013) HSA800 후판재의 맞댐용접부 인장강도 시험, 한국강구조학회논문집, 한국강구조학회, 제25권, 제4호, pp. 431-440. (Lee, C., Kim, D., Han, K., Park, C. Kim, J., Lee, S., and Kim, D.H. (2013) Tensile Testing of Groove Welded Joints Joining Thick-HSA800 Plates, Journal of Korean Society of Steel Construction, KSSC, Vol.25, No.4, pp.431-440 (in Korean)). https://doi.org/10.7781/kjoss.2013.25.4.431
  12. 이강민, 이명재, 오영석, 김태수, 김도환(2013) 중심압축력을 받는 건축구조용 고성능강(HSA800) 용접H형 단주의 국부좌굴거동, 한국강구조학회논문집, 한국강구조학회, Vol.25, No.3, pp.289-297. (Lee, K., Lee, M., Oh, Y., Kim, T., and Kim, D.H. (2013) Local Buckling Behavior of Stub H-shaped Columns Fabricated with HSA800 High Performance Steels under Concentric Axial Loading, Journal of Korean Society of Steel Construction, KSSC, Vol.25, No.3, pp.289-297 (in Korean)). https://doi.org/10.7781/kjoss.2013.25.3.289
  13. 유정한, 김주우, 양재근, 강주원, 이동우(2013) 국부좌굴을 고려한 건축구조용 고성능강(HSA800) 조립각형강관 압축재의 적용성 평가, 한국강구조학회논문집, 한국강구조학회, 제25권, 제3호, pp.223-231. (Yoo, J., Kim, J., Yang, J., Kang, J., and Lee, D. (2013) Evaluation on Applicability of Built-up Square Tubular Compression Members Fabricated with HSA800 High Performance Steel Considering Local Buckling, Journal of Korean Society of Steel Construction, KSSC, Vol.25, No.3, pp.223-231 (in Korean)). https://doi.org/10.7781/kjoss.2013.25.3.223
  14. CSI (2013) ETABS 2013-User's guide, Computers & Structures, Inc.
  15. 대한건축학회(2009) 건축구조기준, 기문당. (Architectural Institute of Korea (2009) Korean Building Code - Structural, Kimoondang (in Korean)).

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