| Title |
Seismic Performance Evaluation of High-rise Steel Diagrid Frames with Torsional Irregularity |
| Authors |
Kim, Seon-Woong ; LeeKyung-Koo |
| Keywords |
High-rise Building ; Diagrid Steel Frames ; Irregularity ; Low Seismicity ; Economics ; Seismic Performance Evaluation |
| Abstract |
This paper analyzes economics and investigates the possibility of elastic seismic design of wind-designed high-rise steel diagrid frames with torsional irregularity in Korea. To this end, high-rise steel diagrid frames with twist angles of 0° (to represent regular building), 1°, and 2° were first designed to resist wind loads. Then, seismic performance evaluation for the buildings was conducted using linear dynamic analysis. Analysis results show that total steel weights of the wind-designed high-rise steel diagrid frames with twist angle of 1° and 2° are about 1.14 and 1.22 times larger, respectively, than the weight of regular frame with twist angle of 0°. Demand-to-capacity ratio and seismic performance level present that high-rise steel diagrid frames can resist service level earthquake elastically whether high-rise building has torsional irregularity or not. For maximum considered earthquake, high-rise steel diagrid frames with torsional irregularity may be designed based on the limited ductility seismic design methodology. |