Army corps of engineers 19581960 gravity dam design, em 111022200, govern ment printing office, washington, d. Design of concrete gravity dam free download as powerpoint presentation. An archgravity dam or arched dam is a dam with the characteristics of both an arch dam and a gravity dam. Gravity dam free download as powerpoint presentation. The considerations used to develop the criteria in this monograph were based. It is intended to implement an internal drainage facility, which would reduce uplift pressure by about 20%. How concrete dam is made making, history, used, components. Please visit asdsos learning center to find more training webinars related to dam safety and dam engineering. Pdf comparison of design and analysis of concrete gravity dam. A curved gravity dam resists the external forces by its weight and not by arch action. Many of the forces which must be cons idered in the design of the gravity dam structure are of such a nature that an exact determination ca nnot be made. The pine flat concrete gravity dam has been selected for the purpose of the analysis and its structural capacity, assuming no sliding plane and rigid foundation, has been estimated using the two well. Seismic assessment of concrete gravity dams using capacity.
A gravity dam is a solid structure, made of concrete or masonry, constructed across a river to create a reservoir on its upstream. Pdf dams have been constructed for millennia, influencing the lives of humans and the ecosystems they inhabit. The solid form is the more widely used of the two, though the hollow dam is frequently more economical to construct. Stability analysis of concrete gravity dam using fem dragan rakic1, milan bojovic1, snezana vulovic1, miroslav zivkovic1, dejan divac2, nikola milivojevic2 1faculty of engineering, university of kragujevac, sestre janjic 6, 34000 kragujevac, serbia. Concrete and masonry dams the national academies press. Concrete dam engineering 1 0401544 hydraulic structures university of sharjah dept. The upstream face may be kept throughout vertical or partly slanting for some of its length. Figure 1 forces acting on a concrete gravity dam the correlation between these forces, to maintain equilibrium, is given by the expression. A gravity dam is a dam constructed from concrete or stone masonry and designed to hold back water by primarily using the weight of the material alone to resist the horizontal pressure of water pushing against it. Finite element has been widely used in the analysis of concrete gravity dams with a defined approach as presented in this paper. Gravity dams gravity dams criteria for selection of dam site, construction material, forces acting on gravity dam, modes of failure, stability analysis, safety criteria, methods of design, stress analysis and stress contours, galleries, instrumentation, joints, keys, water seals, temperature control in concrete dams, foundation. Dec 14, 2016 chapter 6 concrete dam engineering with examples 1.
The concrete gravity dam has weight as its strength. Gravity dam is constructed of concrete andor masonry andor laidup stone that relies upon its weight for stability. The purpose of this manual is to provide technical criteria and guidance for the planning and design of concrete gravity dams for civil works projects. Through analyzing concrete gravity dam structures mechanical characteristics in construction process and operating process, this paper adopts finite element method to. Measured and computed uplift pressures for shasta dam. Dams constructed out of masonry or concrete and which rely solely on its self weight for stability fall under the nomenclature of gravity dams. Masonry and concrete gravity dams number of amendments. Gravity dams gravity dams criteria for selection of dam site, construction material, forces acting on gravity dam, modes of failure, stability analysis, safety criteria, methods of design, stress analysis and stress contours, galleries, instrumentation, joints, keys, water seals, temperature control in concrete dams, foundation treatment.
It has a height of 221 metres 726 feet from its foundations, a crest length of 379 metres 1,244 feet, and a. It is a dam that curves upstream in a narrowing curve that directs most of the water pressure against the canyon rock walls, providing the force to compress the dam. Sl3192005 design standard for concrete gravity dams. Through analyzing concrete gravity dam structures mechanical characteristics in construction process and operating process, this paper adopts finite element method to carry out structural analysis. Shear resistance on an existing joint in rock foundation of a gravity dam 4. For a gravity dam of 100 m, the foundation uplift pressure is approximately 20% of the dam weight under normal reservoir level and is therefore the main load for concrete gravity dams which directly influences the dam stability 10, 11. Gravity dams are classified as solid or hollow and are generally made of either concrete or masonry. This study provides three dimensional linear dynamic analysis of roller compacted concrete gravity dam with a complete damfoundationwater interaction by using eacd3d08 program. Dams is also being prepared and will soon be published. It incorporates 28 million cubic metres 37 million cubic yards of concrete and 463,000 metric tons of steel into its design. The example illustrates a typical application of the concrete damaged plasticity material model. Gravity dam loads on concrete dams loads can be classified in terms of applicabilityrelative importance as primary loads, secondary loads, and exceptional loads.
Figure 1 shows the system of forces that acts on a typical dam. Comparison between response spectrum and time history. Cyclopean concrete was generally used between the 1870s and 1930s in large gravity dams and other massive structures wh ere enormous volumes of concrete are required. Starting in 2015, vertical access has worked with puget sound energy to perform conditions assessments at two concrete dams. In structural concept the buttress dam consists of a continuous upstream face supported at regular intervals by downstream buttresses. The section of the gravity dam is approximately triangular in shape, with its apex at its top and maximum width at. Guidelines for the design of grout curtains, part 2. The dalles dam is a concrete gravity runoftheriver dam spanning the columbia river, two miles 3 km east of the city of the dalles, oregon, united states. It serves as a guide to sound engineering practices in the design of concrete gravity dams and provides the technically trained, qualified design engineer with specialized and technical information that can be readily used in. Comparison of design and analysis of concrete gravity dam. Design of concrete gravity dam dam deformation engineering. The analysis of the concrete gravity dams foundation.
Hoover dam, built on the colorado river at the arizonanevada border between 1931 and 1936, is an outstanding example of a curved gravity dam built in a narrow gorge across a major river and employing advanced design principles. A concrete gravity dam is a massive concrete structure, roughly triangular in shape, and designed so that its weight ensures structural stability against the hydrostatic pressure of the impounded water and other forces that may act on the dam. In 19982003, he served as the rcc design task leader for the olivenhain dam in san diego, california. Pdf structural analysis of a gravity dam using finite elements. Legally binding document step out from the old to the newjawaharlal nehru invent a new india using knowledge. Water in the reservoir upstream of the dam pushes horizontally against the dam, and the weight of the gravity dam pushes. Exercise problem 1 a concrete gravity dam 15 m height will be constructed with the dimensions shown in the figure below. The solid head or massive buttress dam is the most prominent modern variant of the type, and may be considered for conceptual purposes as a lightened version of the gravity dam. Bureau of reclamation 1977 design of arch dams, design manualfor. Comparison of design and analysis of concrete gravity dam 19.
Several methods are used for the design of concrete gravity dams by analyzing the dam response under static and dynamic loads. Gravity dams may be classified by plan as straight gravity dams and curved gravity. Diagrams of base pressures acting on a gravity dam. Many concrete gravity dams have been in service for over 50 years, and over this period important advances in the methodologies for evaluation of natural phenomena hazards have caused the design. It serves as a guide to sound engineering practices in the design of concrete gravity dams and provides the technically trained, qualified design engineer with specialized and technical information that can be readily used in the design of such a dam. Presents instructions, procedures, and standards for use in the design of concrete gravity dams. The dam is composed of three blocks of equal heights. It combines the strengths of two common dam forms and is considered a compromise between the two. Engineering judgement must be exercised by staff when evaluating procedures or. Design and construction of concrete gravity dams nptel.
A gravity dam is mostly straight in plan and is known as straight gravity dam. However, the savings in concrete may be more than offset by the high cost of form work and reinforcement for a buttress dam. Gilboa dam reconstruction project summary contracts cat212b. Forces acting on a gravity dams with diagram geography. Design of gravity dams was prepared to cover all heights of concrete gravity dams except small.
The most ancient gravity dam on record was built in egypt more than 400 years b. The purposes of dam construction may include navigation, flood damage reduction, hydroelectric power generation, fish and wildlife enhancement, water quality, water supply, and recreation. Analysis of concrete gravity dam by 3d solid element. Learning outcome after this lecture, students should be able to 1. Bureau of reclamation 1976 design of gravity dams, design manual for concrete gravity dams, government printing office, washington, d.
A drainage gallery is generally provided in order to relieve the uplift pressure exerted by the seeping water. Erdc tr124 fragility analysis of a concrete gravity dam. The seepage safety evaluation of a concrete gravity dam is the main task of dam security monitoring. Many concrete gravity dams have been in service for over 50 years, and over this period important advances in the methodologies for evaluation of natural phenomena hazards have caused the. Guidelines for design of dams january 1985 revised january 1989. Arch gravity dams are massive dams of concrete that resist the thrust of water by their weight using the force of gravity and the arch action an arch gravity dam incorporates the archs curved design that is so effective in supporting the water in narrow, rocky locations where the gorges sides are of hard rock and the water is forced into a narrow channel. Gravity dams are solid concrete structures that maintain their stability against design loads from the geometric shape, mass and strength of the concrete.
This manual applies to all hqusace elements, major subordinate commands. Modes of dam failure and monitoring and measuring techniques. Gilboa dam reconstruction project summary contracts cat. The purpose of this manual is to provide technical criteria and guidance for the planning and design of concrete gravity dams for civil works. This oversight was only discovered after the dam had experienced significant downstream movement. In this example we consider an analysis of the koyna dam, which was subjected to an earthquake of magnitude 6.
The dalles dam is a concretegravity runoftheriver dam spanning the columbia river, two miles 3 km east of the city of the dalles, oregon, united states. This study provides three dimensional linear dynamic analysis of roller compacted concrete gravity dam with a complete dam foundationwater interaction by using eacd3d08 program. Pdf design and analysis of concrete gravity dams researchgate. Gravity dams are designed so that each section of the dam is stable and independent of any other dam section. Bob specializes in concrete gravity dam design and was involved in the first rollercompacted concrete rcc gravity dams constructed in pennsylvania, maryland, and california.
Chapter 6 concrete dam engineering with examples 1. A concrete gravity dam of different heights 70m, 90 m and 110 m model is prepared in staadpro to perform the time history analysis and response spectrum analysis. Pdf structural analysis of a gravity dam using finite. Height is the vertical dimension from the downstream toe of the dam at. A cross section of this dam looks like a triangle, and the wide base is about threefourths of the height of the dam. The closest towns on the washington side are dallesport and wishram. However, no significant cracking was detected in the dam concrete, even though it later experienced severe cold weather conditions. Lower baker dam a gravityarch dam completed in 1925 and upper baker dam a gravity dam completed in 1959 are located in skagit and whatcom counties, washington. Pdf design of gravity dam by genetic algorithms researchgate.
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