| Title |
Seismic Response Analysis of Irregular Buildings with a Partial Shape Tapered Using Tuned Mass Damper |
| Authors |
이재민(Lee, Jae-Min) ; 이다혜(Lee, Da-Hye) ; 강주원(Kang, Joo-Won) |
| DOI |
https://doi.org/10.5659/JAIK.2026.42.6.315 |
| Keywords |
Irregular Buildings; Partial Tapered Sturctures; High-Rise Buildings; Tuned Mass Damper; Seismic Response |
| Abstract |
Tapered irregular buildings are characterized by a gradual reduction in cross-sectional area with increasing height. Recently, partially tapered
configurations, in which tapering is applied only over a specific height range, have been adopted in several high-rise structures. However, the
reduction in plan area toward the upper stories leads to decreased lateral stiffness, requiring careful evaluation of seismic behavior. This study
develops five 60-story 2D analytical models, including a straight model, a fully tapered model, and partially tapered models. Seismic
performance is evaluated through linear time history analyses using three earthquake ground motion records and a resonant harmonic load.
The analysis focuses on structural responses in relation to the mass ratio of the tuned mass damper (TMD). The results show that the
application of a TMD effectively reduces top story displacement. However, the additional mass at the upper levels also increases story shear
forces in the upper region of the structure. This increase in shear force leads to higher story drift ratios and a greater maximum drift.
Among the tapered configurations, partially tapered models with tapering applied to the upper stories demonstrate more stable damper
behavior and provide the most effective seismic response control. |