Concrete Dams
Probabilistic model for the representation of the reservoir water level of concrete dams during normal operation periods
... of concrete dams in which the reservoir water level was considered either as a deterministic variable (Westberg 2010) or as a random variable defined using specific hydrological site information (Altarejos ...
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Comparison of the structural stability of gravity concrete dams using USACE and USBR standards
... the concrete-rock contact must be raised to a value achieving the desired safety factors; or a passive wedge has to be used at the downstream face to increase the sliding ...of concrete, consequently the ...
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Three-dimensional earthquake analysis of roller-compacted concrete dams
... RCC dams are relatively dry, lean, zero-slump concrete material containing coarse and fine aggregate that is consolidated by external vi- bration using vibratory rollers, bulldozers, and other heavy ...RCC ...
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Eect of Alkali-Aggregate Reactions in Concrete Dams Using Finite Element Method
... In this paper, two models were proposed for mod- eling the eects of the AAR. They incorporate the eect of AAR expansion coupled with degradation of concrete properties. The main features for initiation and ...
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Thermal Stress Analysis of a Dam Wall by Finite Element Model
... Arch dams are designed for the same loads as other dams with the exception of the temperature load, which has a significant influence in arch dam design as compared to gravity dam ...In concrete arch ...
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Comparison between Strain-Based vs. Stress-Based Criteria in Seismic Performance Evaluation of High Arch Dams
... arch dams where high stresses and strains are usually oriented in the arch and cantilever directions, DCR refers to the ratio of calculated arch or cantilever stress (or strain) to the tensile strength of mass ...
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Dynamic Stress and Displacement Fields on Concrete Gravity Dams due to Harmonic Ground Motion
... on concrete dams can significantly be affected by the effects of ground motion caused by seismic activity [13], and this underscores the need for effective methods of analysis of dynamic response of such ...
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Evaluation of Underwater Blast on Concrete Gravity Dams Using Three-Dimensional Finite-Element Model
... how concrete dams are affected during strong earthquakes: Zhou and Lin [22] and Lin et ...many concrete gravity dams to find out the seismic failure of concrete gravity ...of ...
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Domain reduction method for seismic analysis of dam-foundation-fault system
... Concrete dams are among the most important in- frastructures in every country and hence, their safety during severe earthquakes is extremely ...of concrete dams requires accurate simulation of ...
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Determination of limit-states for near-fault seismic fragility assessment of concrete gravity dams
... Dierent approaches can be utilized to derive the fragility curves, including empirical, judgmental, analytical, and hybrid methods. In the case of concrete dams, most researchers have derived the fragility ...
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Nonlinear Seismic Response of Concrete Gravity Dams due to Foundation Fault Movement
... Generally, concrete dams have not been sited at loca- tions where faults are classied as ...for concrete dams where there is some possibility of fault displacement occurring underneath the ...
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Multi-criteria optimization of concrete arch dams
... Large concrete dams are made up of several blocks called monoliths. Monoliths are separated by vertical contraction joints, which would be connected to each other after grouting with low tensile strength ...
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An Overview of Earthquakes and Dams in India
... of concrete (Arch, Buttress & Gravity) dams subjected to ground motions > ...that concrete dams have performed well when subjected to high intensity ...why concrete dams ...
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Determination of Fracture Parameters of High Performance Concrete
... of concrete structures. Even under service loads, concrete structures are normally full of ...reinforced concrete structures (such as diagonal shear, punching shear, torsion or pull out, or for ...
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Thermal stresses in concrete structures
... rises occur in types of structures like bridge abutments, large concrete girders and retaining walls rather than in mass-concrete dams, because although heat losses are less significant [r] ...
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Effects of Dams on Environment: A Study in Global Perspective
... of dams can lead to floods in the plain areas as due to removal of dams, sludge flows down to the ...these dams are corroded because of the mud flowing down into the dams from the hilly ...
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The Hydropower Plants Dams
... mature. Dams can also block the migration of fish that swim upstream to reach spawning ...large dams have blocked the migration of Coho, Chinook, and sockeye salmon from the ocean to their upstream spawning ...
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Two-dimensional hydrodynamic modelling of channel processes and floods characteristics at the confluence of the Amur and Zeya rivers
... The confluence of the Amur and Zeya rivers is densely populated area. There are two main cities – Russian city Blagoveshchensk with 200 000 residences on left bank of the river Amur and Chinese city Heihe with population ...
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Dams for Development
... decades dams projects have become mired in controversy as the projected benefits come at significant social and environmental costs (Namy, ...of dams according to the World Commission of Dams (WCD) ...
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Evaluation of CO2 emissions reductions by timber check dams and their economic effectiveness
... with concrete check dams, however, the respective figures were 213 % in case (a), 173 % in case (b), and 144 % in case (c), showing that although they might be competitive with concrete check ...
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