대형 댐의 지진응답특성평가를 위한 원심모형시험 기법 연구
A Study on Geotechnical Centrifuge Testing Method for Seismic Performance Evaluation of Large Embankment Dams
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초록
Damages of large embankment dams by recent strong earthquakes in the world highlight the importance of seismic security of dams. Some of recent dam construction projects for water storage and hydropower are located in highly seismic zone, hence the seismic performance evaluation is an important issue. While state-of-the-art numerical analysis technology is generally utilized in practice for seismic performance evaluation of large dams, physical modeling is also carried out where new construction technology is involved or numerical analysis technology cannot simulate the behavior appropriately. Geotechnical centrifuge modeling is widely adopted in earthquake engineering to simulate the seismic behavior of large earth structures, but sometimes it can’t be applied for large embankment dams due to various limitations. This study proposes a dynamic centrifuge testing method for large embankment dams and evaluated its applicability. Scaling relations for a case which model scale and g-level are different could be derived considering the stress conditions and predominant period of the structure, which is equivalent to previously suggested scaling relations. The scaling principles and testing method could be verified by modified modeling of models using a model at different acceleration levels. Finally, its applicability was examined by centrifuge tests for an embankment dam in Korea.
Abstract
Damages of large embankment dams by recent strong earthquakes in the world highlight the importance of seismic security of dams. Some of recent dam construction projects for water storage and hydropower are located in highly seismic zone, hence the seismic performance evaluation is an important issue. While state-of-the-art numerical analysis technology is generally utilized in practice for seismic performance evaluation of large dams, physical modeling is also carried out where new construction technology is involved or numerical analysis technology cannot simulate the behavior appropriately. Geotechnical centrifuge modeling is widely adopted in earthquake engineering to simulate the seismic behavior of large earth structures, but sometimes it can’t be applied for large embankment dams due to various limitations. This study proposes a dynamic centrifuge testing method for large embankment dams and evaluated its applicability. Scaling relations for a case which model scale and g-level are different could be derived considering the stress conditions and predominant period of the structure, which is equivalent to previously suggested scaling relations. The scaling principles and testing method could be verified by modified modeling of models using a model at different acceleration levels. Finally, its applicability was examined by centrifuge tests for an embankment dam in Korea.
참고문헌 (21)
- Zhang JM, "Geotechnical aspoects and seismic damage of the 156-m-high Zipingpu concrete-faced rockfill dam following the Ms 8.0 Wenchuan earthquake", Soil Dyn Earthq Eng, 76, pp.145~156 (2015)
- Matsumoto N, "The 2011 Tohoku earthquake and dams", Proc. Int. Symp. On Dams and Reservoirs under Changing Challenges (2011)
- Korean Ministry of Land, Infrastructure and Transport, "Dam design code", ~ (2011)
- Ng CWW, "Centrifuge modeling of loose fill embankment subjected to uni-axial and bi-axial earthquake", Soil Dyn Earthq Eng, 24(4), pp.305~318 (2004)
- Peiris LMN, "Centrifuge modeling of rock-fill embankments on deep loose saturated sand deposits subjected to earthquakes", J Geotech Geoenviron, 134(9), pp.1364~1374 (2008)
- Sharp MK, "Seismic response of earth dam with varying depth of liquefiable foundation layer", Soil Dyn Earthq Eng, 26(11), pp.1028~1037 (2006)
- Kim MK, "Seismic behaviors of earth-core and concrete-faced rock-fill dams by dynamic centrifuge tests", Soil Dyn Earthq Eng, 31(11), pp.1579~1593 (2011)
- Ko HY, "Centrifuges in Soil Mechanics", pp.11~18 (1988), Balkema
- Gazetas G, "Seismic response of earth dams : some recent developments", Soil Dyn Earthq Eng, 6(1), pp.2~47 (1987)
- Garnier J, "Catalog ue of scaling laws and similitude questions in geotechnical centrifuge modelling", Int. J. Phys. Modelling Geotech, 7(3), pp.1~23 (2007)
- Iai S, "Generalized scaling relations for dynamic centrifuge tests", GGotechnique, 55(5), pp.355~362 (2005)
- Bray JD, "Simplified Procedure for Estimating Earthquake-Induced Deviatoric Slope Displacements", J Geotech Geoenviron, 133(4), pp.381~392 (2007)
- Cho GC, "Particle shape effects on packing density, stiffness, and strenth: natural and crushed sands", J Geotech Geoenviron, 132(5), pp.591~602 (2006)
- Soil moduli and damping factors for dynamic response analyses, "Seed HB", Earthquake Engineering Research Center. Univ. of California Berkeley, 1~43, pp.Report No. EERC 70-10 (1970)
- Iai S, "Soil-structure interaction studies through shakingtable tests", Proc. 2nd Int. Conf. on Earthquake Geotech. Engrg, pp.927~940 (1999)
- Taylor RN, "Geotechnical centrifuge technology" (1995), Blackie Academic
- 김동수, "Self-balanced Earthquake Simulator on Centrifuge and Dynamic Performance Verification", KSCE Journal of Civil Engineering, 17(4), pp.651~661 (2013), 대한토목학회[DOI]
- 하익수, "미소지진 계측기록을 활용한 국내 사력댐 고유주기 산정방법", 한국지반환경공학회 논문집, 12(6), pp.53~60 (2011), 한국지반환경공학회
- Ryan, H. Ricker, "Ormsby, Klauder, Butterworth - A Choice of Wavelets", CSEG Recorder, 19(7), pp.8~9 (1994)
- Okamoto S., "Introduction to Earthquake Engineering", pp.466~477 (1984), University of Tokyo Press
- 하익수, "조립재료의 입도특성에 따른 동적 변형특성 평가", 한국지반공학회논문집, 29(8), pp.5~14 (2013), 한국지반공학회