콘크리트 표면차수벽형 석괴댐의 지진 취약도 평가
Evaluation of Seismic Fragility of Concrete Faced Rockfill Dam
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초록
본 연구에서는 지반진동 강도에 따른 콘크리트 표면차수벽 석괴댐(CFRD)의 확률론적 피해예측을 위하여 취약도 함수를 개발하였다. 댐의 손상평가에 널리 사용되는 지표인 댐마루 침하량을 손상지수로 사용하여 경미(Minor), 중간(Moderate), 심각(Severe) 손상수준을 정의하였다. 침하량은 댐 표준단면에 대한 비선형 동적 수치해석을 통하여 계산하였다. 수치해석 모델은원심모형시험결과와 비교하여 정확성을 검증하였다. 취약도 곡선은 대수정규분포함수로 나타내어 최대지반가속도를 기준으로 도출하였다. 본 연구에서 도출된 취약도 곡선은 댐의 실시간 피해예측에 활용될 수 있을 것으로 판단된다.
Abstract
The fragility curves for CFRD dams are derived in this study for probabilistic damage estimation as a function of a ground motion intensity. The dam crest settlement, which is a widely used damage index, is used for minor, moderate, and extensive damage states. The settlement is calculated from nonlinear dynamic numerical simulations. The accuracy of the numerical model is validated through comparison with a centrifuge test. The fragility curve is represented as a log normal distribution function and presented as a function of the peak ground acceleration. The fragility curves developed in this study can be utilized for real time assessment of the damage of dams.
참고문헌 (11)
- Darendeli, M. B., "Development of a new family of normalized modulus reduction and material damping curves", Ph. D., pp.2001
- Itasca Consulting Group, "Fast Lagrange Analysis of Continua, Version 7.0", ~ (2011)
- Kim, M. K., "Seismic behaviors of earth-core and concrete-faced rock-fill dams by dynamic centrifuge tests", Soil Dynamics and Earthquake Engineering, 31(11), pp.1579~1593 (2011)
- KISTEC, "Evaluation and improvement of seismic performance for the existing dam, GOVP1200519131", MOCT, ~ (2004)
- Kong, X., "Seismic performance evaluation of high CFRD based on incremental dynamic analysis", Chin J Geotech Eng, 1(6), pp.6~20 (2017)
- Kuhlemeyer, R. L., "Finite element method accuracy for wave propagation problems", Journal of Soil Mechanics & Foundations Div, 99 (1973)
- MOLIT, "Korean design standard of Dam (in Korean)", ~ (2016)
- MPSS, "Common application of seismic design criteria (in Korean)", ~ (2017)
- Newmark, N. M., "Effects of earthquakes on dams and embankments", Geotechnique, 15(2), pp.139~160 (1965)
- Sawada, Y., "Study on the material properties and the earthquake behaviors of rockfill dams", Proc. of 4th Japan Earthquake Engineering Symposium, pp.695~702 (1975)
- Swaisgood, J. R., "Embankment dam deformations caused by earthquakes", Proc. of 2003 Pacific Conference on Earthquake Engineering (2003)