Damage evolution mechanism and safety evaluation criterion of ultra-high rockfill dam system under strong earthquakes

ZOU De-gao; LIU Jing-mao; KONG Xian-jing; CHEN Kai; QU Yong-qian; NING Fan-wei; GONG Jin

doi:10.11779/CJGE202207011

Volume 44 Issue 7

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Chinese Journal of Geotechnical Engineering > 2022 > 44(7): 1329-1340. > DOI: 10.11779/CJGE202207011

ZOU De-gao, LIU Jing-mao, KONG Xian-jing, CHEN Kai, QU Yong-qian, NING Fan-wei, GONG Jin. Damage evolution mechanism and safety evaluation criterion of ultra-high rockfill dam system under strong earthquakes[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(7): 1329-1340. DOI: 10.11779/CJGE202207011

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Damage evolution mechanism and safety evaluation criterion of ultra-high rockfill dam system under strong earthquakes

ZOU De-gao^{1, 2,},
LIU Jing-mao^{1, 2, ,},
KONG Xian-jing^{1, 2},
CHEN Kai^{1, 2},
QU Yong-qian^{1, 2},
NING Fan-wei^{1, 2},
GONG Jin^{1, 2}

1.
State Key Laboratory of Coastal & Offshore Engineering, Dalian University of Technology, Dalian 116024, China
2.
School of Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China

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Received Date: March 04, 2022
Available Online: September 22, 2022

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Abstract

Abstract

Several ultra-high earth and rockfill dams up to 250 to 300 m in height are to be built in the intensive earthquake regions of West China. The strong outburst and high uncertainty of strong earthquakes pose a great threat to the safety of ultra-high earth and rockfill dams. The seismic safety evaluation of the ultra-high earth and rockfill dams is a multi-system, three-dimensional, nonlinear and discontinuous problem. However, the traditional dynamic analysis of high earth and rockfill dams is still within the range of weak nonlinearity, and the effects of multi-system interaction are mostly simplified and carried out in isolation, which is difficult to reveal the dynamic failure process and coupling effects of the ultra-high earth and rockfill dams under strong earthquakes. The project is oriented to the construction needs of 300 m-ultra-high earth and rockfill dams. Relying on the ultra-high earth and rockfill dams such as Lava and RM, the strong nonlinearity of the rockfill materials, dam-foundation-reservoir interactions, refined modelling methods, high-performance software and the assessment methods and criteria for the ultimate seismic capacity of the ultra-high earth and rockfill dams are studied. The results can provide advanced assessment methods and criteria for the aseismic design of ultra-high earth and rockfill dams.
- high earth and rockfill dam,
- earthquake,
- soil-structure interaction,
- refined analysis,
- ultimate seismic capacity

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Damage evolution mechanism and safety evaluation criterion of ultra-high rockfill dam system under strong earthquakes

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