| Title |
Effect of Column Shear Deformation on Seismic Collapse Risk of Steel Special Moment Frames |
| Authors |
한상환(Han, Sang Whan) ; 김태오(Kim, Taeo) |
| DOI |
https://doi.org/10.5659/JAIK.2022.38.12.297 |
| Keywords |
Seismic Performance ; Steel Moment Frame ; Numerical Model ; Column Shear Deformation ; Lateral Stiffness ; |
| 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. |