Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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Comparison of Progressive Collapse Resistance of Steel Moment Frame Systems with WUF-B verse RBS Connection Details

WUF-B 및 RBS 접합상세에 따른 철골모멘트골조 시스템의 연쇄붕괴 저항성능 비교평가

  • 이상윤 ((주)엔알씨구조연구소 기업부설연구소) ;
  • 노삼영 (한양대 건축학부 건축공학전공) ;
  • 나영수 (한양대 일반대학원 건축시스템공학과)
  • Received : 2020.07.17
  • Accepted : 2020.09.03
  • Published : 2020.09.30
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Abstract

The purpose of tIn this study, the column removal scenarios defined by U.S. General Services Administration (GSA 2003) were performed to compare the progressive collapse resistance of ordinary moment frames (OMFs) to that of intermediate moment frames (IMFs), which are most frequently used in the design of steel structures. Three prototype structures with either welded unreinforced flange-bolted web (WUF-B) or reduced beam section (RBS) connections suitable for each of the lateral load resisting systems were designed according to KBC 2016. Considering the reliability, convenience, and efficiency of modeling and analysis, structural members (beams, columns, connections, and composite slabs) were modeled using reduced models of 1-D and 2-D elements, and energy-based approximate analyses reflecting dynamic effects were performed. The comparison of the progressive collapse resistance capacities of the buildings was based on GSA 2003, as well as the structural robustness index. All three structures satisfied the chord rotation criterion of the GSA and showed sufficient resistance capacities in the 1-column removal scenario (1-CRS), but not in the 2-column removal scenario (2-CRS). In addition, it was confirmed that the RBS connection showed better resistance capacity than the WUF-B connection in results produced by the OMFs, and that the OMFs were superior to the IMFs when comparing the structural systems. Using these results, it is possible to reduce the effort needed for complex numerical modeling and time-consuming analyses and to aid in predicting the progressive collapse resistance capacity of similar types of structures.

Keywords

Acknowledgement

이 성과는 2019년도 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임(No.2019R1F1A1057355)

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