نتایج جستجو برای: earth dams

تعداد نتایج: 101458  

Increasing the pore water pressure in the body of dams will reduce the effective stress and thus reduce the shear strength of the body materials of the dam, which can lead to dangerous results and cause instability of earth dams. According to nonlinear behavior of earth dam, behavioral models of Mohr–Coulomb and hardening soil model are used to model the dam and body materials. In this study, u...

ژورنال: علوم آب و خاک 2022

The objective of this study was to investigate how the earth dam is destroyed due to the effect of upstream and downstream slope of the body in overflow conditions. Therefore, eight models were provided that each model is constructed from the embankment dam with different upstream and downstream slopes (1:1, 2:1) and the soil properties (Sc) on breach formation. The time and method of dam break...

Journal: :E3S web of conferences 2023

The paper provides a detailed analysis of the current state problem. A mathematical model is presented to determine dynamic behavior earth dams, considering viscoelastic properties soil, using hereditary Boltzmann-Volterra theory with A.R. Rzhanitsyn kernel under periodic kinematic impacts. To solve problems considered, finite element method and complex arithmetics were used reduce integrodiffe...

2008
S. López-Querol P. J. M. Moreta

Earthfill dams are man-made geostructures which may be especially damaged by seismic loadings, because the soil skeleton they are made of suffers remarkable modifications in its mechanical properties, as well as changes of pore water pressure and flow of this water inside their pores, when subjected to vibrations. The most extreme situation is the dam failure due to soil liquefaction. Coupled f...

Journal: :The journals of gerontology. Series A, Biological sciences and medical sciences 2012
Bruce A Carnes Rüdiger Riesch Ingo Schlupp

The certitude of death makes reproduction the foundation upon which all life-history strategies are based. Plasticity in the reproductive biology of organisms is an essential adaptive response to the capricious and hazardous environments of earth. In this article, we use data from a breeding colony for laboratory mice to examine the mortality risks of offspring born at the outer boundaries of t...

2009
F. Najaei Abadi

This paper presents a numerical analysis of the seismic behaviour of earth dams. Analysis is conducted for the solid phase. It may correspond to the response of the dam before water filling. Analysis is conducted for a simple case which concerns the elastic response of the dam. Numerical analyses are conducted using the FLAC3D program. The behaviour of the Shell and core of the dam and the foun...

2012
Matt Finer Clinton N. Jenkins

Due to rising energy demands and abundant untapped potential, hydropower projects are rapidly increasing in the Neotropics. This is especially true in the wet and rugged Andean Amazon, where regional governments are prioritizing new hydroelectric dams as the centerpiece of long-term energy plans. However, the current planning for hydropower lacks adequate regional and basin-scale assessment of ...

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