Effect of Static Seismic Loading and Uplift Parameters on the Stability of a Concrete Gravity Dam

The safety is first-class important event of the dam. The crash for the gravity dam usually causes due to slid, the slippery stable is a key problem of big dam. This paper checks the stability of one dam by rigid body limit equilibrium method and finite element technique. Rigid body limit equilibrium method is a kind of traditional stable analytical method, which is confirmed by factual engineering, the safe coefficient is always used to judge the big dam safety degree. The finite element technique is a method which is quickly developed in the calculator science and the basic theories of the rock soil mechanics. The paper compares the two methods and makes sure the fact that the finite element is more reasonable than rigid body limit equilibrium method for analyzing the stability of gravity dam.

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Seepage Safety Assessment of Concrete Gravity Dam Based on Matter-Element Extension Model and FDA

Energies ◽

10.3390/en12030502 ◽

2019 ◽

Vol 12 (3) ◽

pp. 502 ◽

Cited By ~ 3

Author(s):

Xiaoling Wang ◽

Hongling Yu ◽

Peng Lv ◽

Cheng Wang ◽

Jun Zhang ◽

...

Keyword(s):

Safety Assessment ◽

Flood Control ◽

Gravity Dam ◽

Concrete Gravity Dam ◽

Gravity Dams ◽

Concrete Gravity Dams ◽

Extension Model ◽

Infrastructure Project ◽

The Stability ◽

Criteria Importance

As an important infrastructure project, the concrete gravity dam plays an extremely important role in hydropower generation, irrigation, flood control, and other aspects. Seepage is an important factor affecting the stability of concrete gravity dams. Seepage safety assessment is of great significance to the safe operation of the dams. However, the existing seepage safety assessment models are not dynamic, and the correlation among indicators is often neglected and the overall seepage safety of the concrete gravity dams has not been considered. To solve these problems, this research proposes a dynamic matter-element extension (D-MEE) model. First, the D-MEE model is established through adroit integration of the matter-element extension (MEE) model and functional data analysis (FDA). Second, a dynamic criteria importance through the intercriteria correlation (D-CRITIC) method that can effectively consider the correlation among indicators is proposed to determine the weights. Third, the influence of different dam blocks on the overall seepage safety status is considered by constructing a spatial weight matrix. Finally, the proposed method is applied to the concrete gravity dam X in southwest China. The results show that the proposed method is effective and superior to the existing evaluation methods of seepage safety.

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Computation of Stresses in Concrete Gravity Dam Under Seismic Loading Through ANN and FEM

Procedia Engineering ◽

10.1016/j.proeng.2016.12.218 ◽

2017 ◽

Vol 173 ◽

pp. 1779-1783 ◽

Cited By ~ 1

Author(s):

Mohd. Saqib ◽

Md. Imteyaz Ansari

Keyword(s):

Seismic Loading ◽

Gravity Dam ◽

Concrete Gravity Dam

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3D Numerical Simulation of Majiabian Concrete Gravity Dam

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.90-93.2624 ◽

2011 ◽

Vol 90-93 ◽

pp. 2624-2632

Author(s):

Lin Ke Li ◽

Ai Jun Zhang ◽

Jin Yu Liu ◽

Chun Jiao Hou ◽

Hao Dong Li

Keyword(s):

Numerical Simulation ◽

Sensitivity Analysis ◽

Stability Analysis ◽

Water Level ◽

Deformation Modulus ◽

Gravity Dam ◽

Tension Stress ◽

Concrete Gravity Dam ◽

3D Numerical Simulation ◽

The Stability

A new method that 3D numerical simulation combined with anti-cut stability analysis is employed to analyze the stability of Majiabian gravity dam, and the results of the analysis conform to the measured value. And this method can be used in analysis of congener gravity dam. When the results of 2D sliding stability analysis satisfy Code’s requirements, elastic material can be used in 3D numerical simulation. The results of water level sensitivity analysis and deformation modulus of its foundation sensitivity analysis indicates that this gravity dam is insensitive to water level; grouting method can be adopted to enhance its foundation. The results of abutment under tension stress analysis indicate that tension stress of abutment must be considered in high gravity dam design, and arch can be used for reducing the tension stress.

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The Ultimate Seismic Capacity Research of Concrete Gravity Dam Considering the Initial Crack

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.204-208.2641 ◽

2012 ◽

Vol 204-208 ◽

pp. 2641-2645

Author(s):

Pei Si Yu ◽

Wei Qiang Wang

Keyword(s):

Research Result ◽

Initial Crack ◽

Gravity Dam ◽

Peak Acceleration ◽

Concrete Gravity Dam ◽

Seismic Capacity ◽

Constraint Function ◽

Contact Algorithm ◽

Free Body ◽

The Stability

Based on the typical overflow dam section of Ahai gravity dam, the cracking calculation was conducted and the crack form was determined, referring to the experimental research result. Then the constraint-function contact algorithm in ADINA was used to study the stability of the upper free body subjected to an earthquake. The analysis results primarily show that the ultimate seismic capacity of Ahai gravity dam is an earthquake whose peak acceleration is between 3.4g and 3.8g.

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Fracture Analysis on the Interface Crack of Concrete Gravity Dam

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.324-325.267 ◽

2006 ◽

Vol 324-325 ◽

pp. 267-270 ◽

Cited By ~ 2

Author(s):

Zhong Hui Chen ◽

Jing Jing Feng ◽

Li Li ◽

He Ping Xie

Keyword(s):

Interface Crack ◽

Critical Length ◽

Gravity Dam ◽

Concrete Gravity Dam ◽

Displacement Fields ◽

Interface Cracks ◽

Stress And Displacement Fields ◽

Impacting Factors ◽

The Stability ◽

Branch Crack

Some numerical parameters-sensitivity analysis has been conducted to evaluate the stability and propagation of the interface cracks at heel of concrete gravity dam. In this paper, utilizing the software ANSYS to simulate the stress and displacement fields of the tip of the interface cracks between concrete gravity dam and foundation, the stress intensity factor (SIF) of the interface crack is analyzed using facture mechanics. Three impacting factors have been discussed, such as the crack length, the angle of crack, and the water height. Critical length and loads of interface crack propagation are obtained using composite fracture criteria. The results indicate that the coarse interface retards the propagation of interface crack, and redounds to stability of gravity dam. It is found that the interface crack often propagates alone the interface between dam and foundation, simultaneously the branch crack kinks to foundation at the specific condition.

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