Chang Law Analysis of the Horizontal Displacement of the Arch Crest Dam Section of the Geheyan Concrete Gravity Arch Dam

Monitoring data of the arch crown dam section of the Geheyan concrete gravity arch dam were qualitatively and quantitatively analyzed. The analysis results show that the measured data and year changes of the dam horizontal displacement are small, the influence of the water level and temperature on the arch crown dam section is normal, the influence of the aging on the dam horizontal displacement is little, and the aging component has become stable. Therefore, it can be shown that the arch crown dam section of the Geheyan concrete gravity dam is in elastic state, and the horizontal displacement is accord with general deformation law of concrete arch dams.

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Dynamic Responses of Arch Dams Considering Different Reservoir Models

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.250-253.3923 ◽

2011 ◽

Vol 250-253 ◽

pp. 3923-3926

Author(s):

Shao Qing Hu ◽

Bai Tao Sun

Keyword(s):

Finite Element ◽

Finite Element Model ◽

Water Level ◽

Element Model ◽

Arch Dam ◽

Dynamic Responses ◽

Additional Mass ◽

Mass Model ◽

Arch Dams ◽

Reservoir Models

In this paper, the dynamic responses of an arch dam in the case of normal water level and operating low water level were simulated by using additional mass model and incompressible finite element model for reservoir respectively. The results showed that the reservoir models have a great impact on dynamic response of arch dams. The maximum principle tensile stress using incompressible finite element model of fluid is less than that using additional mass model. With the depth of the reservoir water increasing, the hydrodynamic pressure acting ton the dam surface caused by earthquake force increased and the dynamic responses of dam also increased.

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Static analysis of a high arch dam

Acta hydrotechnica ◽

10.15292/acta.hydro.2019.04 ◽

2019 ◽

pp. 45-57

Author(s):

Yaser Ghafoori ◽

Andrej Kryžanowski ◽

Dejan Zupan

Keyword(s):

Water Level ◽

Static Analysis ◽

Three Dimensional ◽

Water Reservoir ◽

Arch Dam ◽

Three Dimensional Model ◽

High Arch Dam ◽

Reservoir Water ◽

Reservoir Water Level ◽

Arch Dams

The paper presents the design and static analysis of a high arch dam. A feasibility study was conducted on the dam in the 90s and a preliminary layout was designed. However, the dam’s construction phase has been never started. In this paper, the design and layout of the dam under consideration are in accordance with the US manuals for the design of arch dams. The structure’s three-dimensional model was entered into the program SAP2000 and three-dimensional solid finite elements were used to discretize the model. This paper considers the hydrostatic pressure of the water reservoir and concrete self-weight. The analysis was performed for both the maximum and the minimum designed water level and for the case when the reservoir is empty. Special attention is given to the boundary conditions of the dam at its abutments and foundation. The results show that the planned layout is good for the dam’s construction. The arch dam’s curve transfers the loads to the abutments. The significant role of the foundation rigidity and the reservoir water level in the stress distribution and nodal displacements within the arch dam is observed.

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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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Application of FME Deterministic Model in the Calculation of a Reservoir Arch Dam

E3S Web of Conferences ◽

10.1051/e3sconf/202127601030 ◽

2021 ◽

Vol 276 ◽

pp. 01030

Author(s):

Rui Zhang ◽

Benjun Shi ◽

Shuanglong Cai ◽

Haojun Wang

Keyword(s):

Elastic Modulus ◽

Deterministic Model ◽

Horizontal Displacement ◽

Large Error ◽

Water Levels ◽

Arch Dam ◽

Monitoring Data ◽

Element Analysis ◽

Arch Dams ◽

Application Problem

At present, the analysis of monitoring data for the stress of dam is mostly based on statistical models. However, the monitoring data of the stress on some arch dams have considerably large error, it is hard to build a reasonable statistic model based on the monitoring data. In order to solve the practical application problem of the project, this paper calculates the elastic modulus of the dam by using finite element analysis based on the displacement of the hydraulic component separated from the statistical model of horizontal displacement. Then according to the reversed elastic modulus, this paper has calculated the dam stress under different water levels and temperature conditions. Finally, it has built a stress-deterministic model of the dam.

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Evaluation of safety in arch dam using post analysis including inertia force and temperature variations of water

Technium: Romanian Journal of Applied Sciences and Technology ◽

10.47577/technium.v2i1.42 ◽

2020 ◽

Vol 2 (1) ◽

pp. 56-65

Author(s):

Alaa Jabbar Rahman ◽

Ali Majdi ◽

Wissam Khlaf Obied

Keyword(s):

Social Life ◽

Water Pressure ◽

Arch Dam ◽

Gravity Dam ◽

Inertia Force ◽

Seismic Load ◽

Concrete Gravity Dam ◽

Maximum Displacement ◽

Worst Case ◽

The Impact

Dams considered as one if very important infrastructure, they are lifeline structures and have a vital role our economics and social life. A concrete gravity dam is one of wide used dam worldwide, it constructed from reinforced concrete and his typical cross section is triangular, the other type is arch section. A gravity dam can be combined with an arch dam into an arch-gravity dam for areas with massive amounts of water flow but less material available for a purely gravity dam. The inward compression of the dam by the water reduces the lateral (horizontal) force acting on the dam. Thus, the gravitation force required by the dam is lessened, i.e. the dam does not need to be so massive. The aim of this paper is to obtain a preliminary post analysis for an arch gravity dam by considering of typical applied loads that effects on it. In order to check and verify the dam and ensure the assumptions used during this process, the dam is analysed in different type of major effects such as own weight, water pressure, temperature and static load intertie generated from seismic load. These loads are presented in this paper in different cases, totally five cases combined between all these factors as explain in details in the section of methodology.To achieve the target of this study, modelling of an arch dam, reservoir and foundation provided by finite element using software ANSYS. An arch dam with height of 41.5 m is studied in this paper to simulate the reality of the future dam that will be erected as accurate as possible. The response of the dams is represented by the maximum displacement of it and also the stresses in each case. The results of all analysis were compared in the five cases mentioned above to determine the impact of each case as well as the worst case affecting the safety of the dam.

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Deformation Analysis of an Ultra-High Arch Dam under Different Water Level Conditions Based on Optimized Dynamic Panel Clustering

Applied Sciences ◽

10.3390/app12010481 ◽

2022 ◽

Vol 12 (1) ◽

pp. 481

Author(s):

Yongtao Liu ◽

Dongjian Zheng ◽

Christos Georgakis ◽

Thomas Kabel ◽

Enhua Cao ◽

...

Keyword(s):

Water Level ◽

Constraint Satisfaction Problem ◽

Water Levels ◽

Arch Dam ◽

Normal Operation ◽

Deformation Analysis ◽

Deformation Model ◽

High Arch Dam ◽

Deformation Law ◽

Dam Deformation

During the operation period, the deformation of an ultra-high arch dam is affected by the large fluctuation of the reservoir water level. Under the dual coupling of the ultra-high dam and the complex water level conditions, the traditional variational analysis method cannot be sufficiently applied to its deformation analysis. The deformation analysis of the ultra-high arch dam, however, is very important in order to judge the dam safety state. To analyze the deformation law of different parts of an ultra-high arch dam, the panel data clustering theory is used to construct a Spatio-temporal characteristic model of dam deformation. In order to solve the difficult problem of the fluctuating displacement of dam deformation with water level effect, three displacement component indexes (absolute quantity, growing, and fluctuation) are proposed to characterize dam deformation. To further optimize the panel clustering deformation model, the objective weight coefficient of clustering comprehensive distance is calculated based on the CRITIC (CRiteria Importance Through Inter-criteria Correlation) method. The zoning rules of the ultra-high arch dam are established by using the idea of the CSP (Constraint Satisfaction Problem) index, and the complex water level of the reservoir is simulated in the whole process. Finally, the dynamic cluster analysis of dam deformation is realized. Through a case study, three typical working conditions including the rapid rise and fall of water level and the normal operation are calculated, and the deformation laws of different deformation zones are analyzed. The results show that the model can reasonably describe the deformation law of an ultra-high arch dam under different water levels, conveniently and intuitively select representative measuring points and key monitoring parts, effectively reducing the analysis workload of lots of measuring points, and improve the reliability of arch dam deformation analysis.

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