Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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Effect of Column Shear Deformation on Seismic Collapse Risk of Steel Special Moment Frames

기둥 전단변형에 대한 고려가 철골 특수모멘트골조의 붕괴위험도 평가에 미치는 영향

  • Han, Sang Whan (Dept. of Architectural Engineering, Hanyang University) ;
  • Kim, Taeo (Dept. of Architectural Engineering, Hanyang University)
  • Received : 2022.07.15
  • Accepted : 2022.11.07
  • Published : 2022.12.30
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Abstract

Nonlinear numerical models to be used for seismic performance evaluation are generally constructed based on measured seismic behavior of structural members and systems. The shear deformation in a column member has been typically considered insignificant in the inelastic range. However, an increase in lateral drifts due to the inclusion of shear deformation may impact the degree of damage in structural members and the onset of collapse. Therefore, for a column member, it is important to include the shear deformation in column numerical models as it can have a significant impact on predicting the structure's response. The aim of this study is to evaluate the effect of column shear deformation on the collapse risk of steel special moment frames (SMFs). Numerical models were constructed with and without considering column shear deformation. It was shown that column shear deformation had a significant effect on the lateral stiffness of the steel SMFs and increased in moment demand due to the P-Delta effect. Such increase in moment demands could affect the collapse mechanism of steel SMFs under seismic loads. Without considering the shear deformation, the collapse risk of SMFs may be also underestimated.

Keywords

Acknowledgement

이 연구는 2022년도 한국연구재단 연구비 지원에 의한 결과의 일부임. 과제번호:2021R1A6A3A0108744412

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