원심모형실험을 활용한 얕은 기초가 있는 다자유도 구조물의 지진응답
Seismic Responses of Multi-DOF Structures with Shallow Foundation Using Centrifuge Test
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
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.
Abstract
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.
참고문헌 (19)
- Taylor PW, "Foundation Rocking under earthquake loading", On Soil Mechanics and Foundation Engineering, 3, pp.33~322 (1981)
- Faccioli E, "Investigation of seismic soilfooting interaction by large scale cyclic tests and analytical models", Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics, ~ (2001)
- Gajan S, "Physical and numerical modeling of nonlinear cyclic loaddeformation behavior of shallow foundations supporting rocking shear walls", Ph.D., Dept of Civil and Environmental Engineering
- Mergo’s PE, "Rocking isolation of a typical bridge pier on spread foundation", Earthquake Eng., 9(2), pp.395~414 (2005)
- Paolucci R, "Seismic behavior of shallow foundations : Shaking table experiments vs numerical modeling", Earthquake Eng., 37(4), pp.577~595 (2007)
- Luco JE, "Response of a rigid foundation to a spatially random ground motion", Earthq Eng Struct Dyn., 14(6), pp.891~908 (1986)
- Stewart JP, "Seismic soil structure interaction in buildings", J Geotech Geoenviron Eng, pp.12526~12537 (1999)
- Veletsos AS, "Transfer function for rigid rectangular foundation", Earthq Eng Struct Dyn, 26(1), pp.5~17 (1997)
- Kim S, "Kinematic soil-structure interaction from strong motion recordings", J Geotech Geoenviron Eng, 129(4), pp.323~335 (2003)
- Wolf J, "Dynamic soil-structure interaction" (1985), Prentice Hall, Inc
- Hoshiya M, "Evaluation of kinematic interaction of soilfoundation systems by a stochastic model", Soil Dynamics and Earthquake Engineering, 2(3), pp.128~134 (1983)
- Elsabee F, "Dynamic behavior of embedded foundations" (1997), Massachusetts Institute of Technology
- Veletsos AS, "Seismic interaction of structures and soils : stochastic approach", J Struct Div, 115(4), pp.935~956 (1989)
- Federal Emergency Management Agency, "FEMA 440 Improvement of nonlinear static seismic analysis procedures" (2005), FEMA
- Kim DK, "Nonlinear system identification on shallow foundation using Extended Kalman Filter", Soil Dynamics and Earthquake Engineering, 128, pp.105857~ (2020)
- Lee SH, "Performance of an equivalent shear beam(ESB)model container for dynamic geotechnical centrifuge tests", Soil Dynamics and Earthquake Engineering, 44, pp.102~114 (2013)
- Applied Technology Council, "Tentative Provisions for the Development of Seismic Regulations for Buildings" (1978), Applied Technology Council
- 신동현, "경주지진 관측자료에 기반한 유효최대지반가속도 분석", 한국지진공학회논문집, 20(7), pp.425~434 (2016), 한국지진공학회
- Kim DK, "Rocking Effect of a Mat Foundation on the Earthquake Response of Structures", Geotech Geoenviron Eng, 141(1), pp.04014085~ (2015)