Evaluation of the seismic response of a homogeneous earth dam

2009 ◽  
Vol 29 (5) ◽  
pp. 782-798 ◽  
Author(s):  
S. Rampello ◽  
E. Cascone ◽  
N. Grosso
Keyword(s):  
Seismic Response ◽  
Earth Dam

scholarly journals Application of the Time Step Optimization Method in Seismic Liquefaction Analysis and Its Evaluation Method for Computational Efficiency Improvement

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Qi Li ◽  
Bin Li ◽  
Shaorui Sun ◽  
Nan Yang ◽  
Fabio Rizzo
Keyword(s):  
Numerical Analysis ◽  
Seismic Response ◽  
Computational Efficiency ◽  
Evaluation Method ◽  
Optimization Method ◽  
Earth Dam ◽  
Efficiency Improvement ◽  
Time Step ◽  
Seismic Liquefaction ◽  
Analysis Platform

In order to solve the time step setting problem in seismic liquefaction numerical analysis, the time step optimization method was introduced into seismic liquefaction numerical analysis platform, and the seismic response of earth dam was analyzed. The results show that the time step optimization method can effectively solve the time step setting problem. In addition, in order to evaluate the computational efficiency improvement of the optimized seismic response, a new method was proposed, and an example with analytical solution was selected to verify it. And the proposed method was used to evaluate the calculation efficiency of the optimized seismic response. The results show that the computing efficiency is greatly improved after the seismic liquefaction numerical analysis program is optimized by the time step optimization method.

scholarly journals Stability Assessment of Zoned Earth Dam under Water Particles Fluidity Effect: Hemren Dam as Case Study

2021 ◽  
Vol 79 (2) ◽  
pp. 27-38
Author(s):  
Saad Shauket Sammen ◽  
Marwah Qaddoori Majeed ◽  
Qutaiba G. Majeed
Keyword(s):  
Numerical Modeling ◽  
Water Level ◽  
Seismic Response ◽  
Factor Of Safety ◽  
Water Levels ◽  
Earth Dam ◽  
Seismic Zone ◽  
Earth Dams ◽  
The Core

Recently the numerical modeling using finite element method is take into account as a very effective tool to investigate the desired behavior of structures in geotechnical engineering. Earth dams are a water retention structures that are normally wide constructed around the world due to its significant features. These structures may be failed due to exposure to an earthquake and this will result in disaster. The main objective of this study is to assess the slope stability and the seismic response of an earthen dam. Since the matter of seismic response is still have a considerable lack of information for earth dams as a unique structure. Hemren zoned earth dam that is located in Diyala governorate, northeast of Iraq that considered as an active seismic zone has been considered as case study. Numerical modeling has been done in this study using Geo studio software. Factor of safety was calculated with different water levels in order to evaluate the dam safety with different operation water level. The excited earthquake is Elcentro while three values of peak ground acceleration were used which are 0.2, 0.25 and 0.3 g and the duration time is scaled to 10 seconds. In addition, three key points (at the core, the shell and the foundation) that represent the dam construction material are used to evaluate the dynamic response within the dam body. The results revealed that the factor of safety is increased when the water level is increase, but in the increasing in the magnitude of factor of safety with water depths of (10 and 15) m was more than the other depth. The zone of the dam core shows a negative pore water pressure value. That leads to an increasing in effective stress at the core of the dam.

3D Valley Site Effect on the Nonlinear Seismic Response of Earth Dam

2013 ◽  
Vol 353-356 ◽  
pp. 1806-1810
Author(s):  
Yong Qiang Li ◽  
Li Ping Jing ◽  
Hai An Liang ◽  
Yan Zou ◽  
Wei Feng Sun
Keyword(s):  
Seismic Response ◽  
Damping Ratio ◽  
Free Field ◽  
Site Effect ◽  
Earth Dam ◽  
Dynamic Strain ◽  
Triaxial Tests ◽  
Artificial Boundary ◽  
Nonlinear Seismic Response ◽  
Valley Site

A three dimensional numerical model for a typical earth dam and its valley site was established and the nonlinear seismic response of this model was performed. Experimental data of cyclic triaxial tests were adopted to determine the curves of modulus ratio and damping ratio that vary with dynamic strain amplitude. Free-field artificial boundary and viscous artificial boundary were employed and the input waves were the revised ground motions obtained from the station near the dam. Distributions of the PGA, displacement, residual deformation, shear strain increment and element failure state were presented. Results demonstrate that the 3D local valley site effect has a significant influence on the seismic response of earth dam.

Seismic Response of Earth Dam with Innovative Polymer Antiseepage Wall

2020 ◽  
Vol 20 (7) ◽  
pp. 04020079
Author(s):  
Jia Li ◽  
Jingwei Zhang ◽  
Yuke Wang ◽  
Bo Wang
Keyword(s):  
Seismic Response ◽  
Earth Dam

scholarly journals Review Article: Numerical analysis of the seismic behaviour of earth dam

2009 ◽  
Vol 9 (2) ◽  
pp. 451-458 ◽  
Author(s):  
Y. Parish ◽  
M. Sadek ◽  
I. Shahrour
Keyword(s):  
Seismic Response ◽  
Kinematic Hardening ◽  
Constitutive Relations ◽  
Seismic Loading ◽  
Earth Dam ◽  
Seismic Behaviour ◽  
Good Tool ◽  
Real Earthquake ◽  
The Stability ◽  
Constitutive Parameters

Abstract. The present study concerns analysis of the seismic response of earth dams. The behaviour of both the shell and core of the dam is described using the simple and popular non associated Mohr-Coulomb criterion. The use of this constitutive model is justified by the difficulty to obtain constitutive parameters for more advanced constitutive relations including isotropic and kinematic hardening. Analyses with real earthquake records show that the seismic loading induces plasticity in a large part of the shell and in the lower part of the core. Analysis shows that plasticity should be considered in the analysis of the seismic response of the dam, because it leads to a decrease in the natural frequencies of the dam together to energy dissipation, which could significantly affect the seismic response of the dam. Plastic analysis constitutes also a good tool for the verification of the stability of the dam under seismic loading.

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