Seismic stability and failure process analysis of earth-filled dam
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GMGDA 2019
Seismic stability and failure process analysis of earth-filled dam Zongyuan Ma 1 & Faning Dang 1 & Hongjian Liao 2 & Yuxiang Cheng 3 Received: 18 June 2020 / Accepted: 12 August 2020 # Saudi Society for Geosciences 2020
Abstract Earthquake is one of the primary influence factors for the stability and safety of the earth-filled dam. An efficient way for the seismic stability and failure process analysis of the earth-filled dam is proposed in this paper. In this study, taking the dynamic mechanical behavior of soil and the ground motion characteristics into account, the seismic stability, and failure process of a twodimensional earth-filled dam is analyzed via the explicit finite element method. A dynamic visco-elasto-plastic constituted model for soil is established and written in FORTRAN as a user subroutine of the finite element method code ABAQUS. The seismic response, residual deformation, and failure process of the earth-filled dam under natural earthquake conditions are analyzed using the dynamic visco-elasto-plastic constituted model and the explicit finite element method. Moreover, the influence of the ground motion characteristics on the seismic stability of the earth-filled dam is analyzed via the specified elastic response acceleration spectrum. The analysis results of this paper suggest that the seismic stability and the progressive failure process analysis of the earth-filled dam under the seismic condition can be analyzed efficiently by explicit finite element method. The dynamic mechanical behavior of soil and the ground motion characteristics are both critical influence factors for the seismic stability analysis of the earth-filled dam. The research work of this study is helpful for the analysis of the failure process of the earth-filled dam collapse. Keywords Earthquake . Earth-filled dam . Seismic stability . Failure process . Explicit finite element method
Introduction The seismic stability analysis and the aseismic capability assessment of the earth-filled dam are important problems for the design of hydraulic engineering. The earthquake is an essential influence factor for the stability of the earth-filled dams, and the earth-filled dams will have a large residual deformation or failure after a strong shock. Thus, the residual deformation and the seismic response of the dam are two essential factors for the earth-filled dam seismic analysis. This article is part of the Topical Collection on Geological Modeling and Geospatial Data Analysis * Zongyuan Ma [email protected] 1
State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
2
Department of Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China
3
College of Geological Engineering and Geomatics, Chang’an University, Xi’an 710064, China
The seismic response of the dam due to earthquakes is investigated by many researchers using analytical and numerical methods. A sliding block analysis method was suggested by Newmark (1965) to determine the earthquake-ind
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