Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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Evaluation of Progressive Collapse Resistance Performance in Steel Ordinary Moment Frames with Welded Cover Plated Flange Connections

WCPF 접합부가 적용된 철골 보통모멘트골조의 연쇄붕괴 저항성능 평가

  • Lee, Sang-Yun (NRC Structure Laboratory Co., Ltd.) ;
  • Wu, Zong-Hua (Dept. of Architectural Engineering, Hanyang University) ;
  • Noh, Sam-Young (Dept. of Architectural Engineering, Hanyang University ERICA)
  • 이상윤 ((주)엔알씨구조 연구소) ;
  • 오종화 (한양대 건축시스템공학과 ) ;
  • 노삼영 (한양대 ERICA 건축학부)
  • Received : 2023.09.26
  • Accepted : 2023.12.04
  • Published : 2023.12.31
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Abstract

FEMA 351 outlines the use of welded cover plated flange (WCPF) connections to prevent brittle fracture and enable plastic deformation at the beam's end in WUF-B connections. This study assesses the progressive collapse resistance of WCPF connections by applying the alternative path method to a target structure previously examined in the evaluation of WUF-B and RBS connections. An energy-based approximate analysis, considering the dynamic effects of sudden column loss, was used to evaluate the structure's progressive collapse resistance in terms of structural robustness and sensitivity. Results were compared with structures featuring WUF-B and RBS connections analyzed in a prior study. The structure incorporating WCPF connections demonstrated a 33% improvement in structural robustness and 11% less sensitivity to progressive collapse when one column was removed, compared to the WUF-B and RBS connections in the previous study. In the scenario of removing two columns, only the structure with WCPF connections exhibited progressive collapse resistance capacity. The WCPF connection displayed superior progressive collapse resistance capacity compared to WUF-B and RBS connections.

Keywords

Acknowledgement

이 연구는 2022년도 한국연구재단 연구비 지원에 의한 결과의 일부임. 과제번호:No.2022R1F1A1075011

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