| Title |
Study on the Seismic Performance for Low-rised RC Building with Vertical and Torsional Irregularities |
| Authors |
Choi, In-Hyuk ; Baek, Eun-Rim ; Lee, Sang-Ho |
| DOI |
https://doi.org/10.5659/JAIK_SC.2019.35.12.137 |
| Keywords |
Ploti-type building; Special seismic load; Torsional amplification factor; Korean Building Code 2016 |
| Abstract |
Korean piloti-type buildings are comprised of pilotis in the first story and shear walls in the upper stories. This vertical irregularity causes
excessive lateral plastic deformation on the first story while the upper stories stay elastic. Meanwhile, asymmetric position of structural
components such as core walls and columns of RC piloti-type buildings tends to produce torsional irregularities of the structures. Korean
Building Code(KBC2016) requires the special seismic load and torsional amplification factor to apply to the piloti-type buildings lower than
six-story or 20m if it has vertical and torsional irregularities when the building corresponds to seismic design category C or D. Many Korean
low-rised RC buildings fall into the class. Therefore, the special earthquake load and torsional amplification factor are often applied to a
building simultaneously. However, it has not been studied enough how much influence each parameter has on buildings with vertical and
torsional irregularities at the same time. The purpose of this study is to evaluate the effect of factor special seismic load and torsional
amplification on seismic performance of irregular buildings. In this study, a damaged 4th story piloti-type building by the Pohang earthquake
was selected and the earthquake response analysis was carried out with various seismic design methods by the KBC 2016. The effect of the
design parameters on seismic performance was analyzed by the dynamic analysis of models with special seismic load and torsional
amplification factor based on the selected building. It was concluded that the application of the torsional amplification factor to the reference
model to which special seismic design was applied, does not significantly affect the seismic performance. |