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Moment ratio considering composite beam action for steel special moment frames

  • Sang Whan Han (Department of Architectural Engineering, Hanyang University) ;
  • Soo Ik Cho (Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign) ;
  • Taeo Kim (Department of Architectural Engineering, Hanyang University) ;
  • Kihak Lee (Department of Architectural Engineering, Sejong University)
  • 투고 : 2022.06.15
  • 심사 : 2023.03.22
  • 발행 : 2023.05.25

초록

The strong column-weak beam (SCWB) moment ratio is specified in AISC 341 to prevent an abrupt column sway in steel special moment frames (SMFs) during earthquakes. Even when the SCWB requirement is satisfied for an SMF, a column-sway can develop in the SMF. This is because the contribution of the composite beam action developed in the concrete floor slab and its supporting beams was not included while calculating the SCWB moment ratio. In this study, we developed a new method for calculating the SCWB moment ratio that included the contribution of composite beam action. We evaluated the seismic collapse performance of the SMFs considering various risk categories and building heights. We demonstrated that the collapse performance of the SMFs was significantly improved by using the proposed SCWB equation that also satisfied the target performance specified in ASCE 7.

키워드

과제정보

The research was supported by "Leaders in Industryuniversity Cooperation 3.0" Project (the Ministry of Education) and National Research Foundation of Korea (NRF-2020R1A2C2010548).

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