| 논문명 |
원심모형실험을 활용한 얕은 기초가 있는 다자유도 구조물의 지진응답 / Seismic Responses of Multi-DOF Structures with Shallow Foundation Using Centrifuge Test |
| 수록사항 |
한국지진공학회 논문집, Vol.26 No.3(통권 147호) (2022-05) |
| 주제어 |
; Soil-Structure interaction; Multi-DOF structures; Centrifuge test; Flexible foundation effects |
| 요약2 |
In this study, centrifuge model tests were performed to evaluate the seismic response of multi-DOF structures with shallow foundations. Also, elastic time history analysis on the fixed-base model was performed and compared with the experimental results. As a result of the centrifuge model test, earthquake amplification at the fundamental vibration frequency of the soil (= 2.44 Hz) affected the third vibration mode frequency (= 2.50 Hz) of the long-period structure and the first vibration mode (= 2.27 Hz) of the short-period structure. The shallow foundation lengthened the periods of the structures by 14-20% compared to the fixed base condition. The response spectrum of acceleration measured at the shallow foundation was smaller than that of free-field motion due to the foundation damping effect. The ultimate moment capacity of the soil-foundation system limited the dynamic responses of the multi-DOF structures. Therefore, the considerations on period lengthening, foundation damping, and ultimate moment capacity of the soil-foundation system might improve the seismic design of the multi-DOF building structures. |
