| Term No. | Term Name/Term Description | Action |
|---|
| 2339 |
| Single wall buttress | | A buttress of solid section. It may have (a) uniform thick section, (b) (i) thin section reinforced by stiffeners for lateral stability, (ii) thin section reinforced by struts between the adjacent buttresses for lateral stability...... | | Similar Terms |
| 2340 |
| Similar Terms |
| 2341 |
| Flat slab buttress dam, Flat deck dam, Deck dam, Slab and buttress dam, ,Fixed slab buttress dam, Fixed deck dam, Free deck dam, or Cantilever buttress dam | | A dam usually of reinforced concrete consisting essentially of slabs supported by transverse buttresses. The load is taken by the slabs and transferred to the foundations through the buttresses. The slab may be (i) integrally cast with the buttresses, (ii) freely supported at the buttresses, or (iii) cantilevered from the buttresses. The dams are a..... | | Similar Terms |
| 2342 |
| Truss buttress dam | | A type of deck dam where the massive buttresses are replaced by reinforced concrete trusses to support the deck slab. | | Similar Terms |
| 2343 |
| Columnar buttress dam | | A type of deck dam when the massive buttresses are replaced by a series of inclined columns. | | Similar Terms |
| 2344 |
| Multiple arch-buttress dam | | A type of buttress dam, consisting of a series of arch barrel segments supported by buttresses. The load is transferred by the several arches to the foundations through the buttresses...... | | Similar Terms |
| 2345 |
| Deckless buttress dam, Massive head buttress dam | | A type of buttress dam when the face slab is replaced by flaring the upstream edges of the buttresses to span the distance between buttress walls. The flaring portion of the buttress (head) may be of various geometrical shapes, viz. (i) massive head, (ii) round head or mushroom head, (iii) diamond head. The buttress dams comprising types of head cl..... | | Similar Terms |
| 2346 |
| Multiple dome buttress dam | | A modification of a multiple arch dam, with a large dome-shaped structure between the buttresses (illustrated). | | Similar Terms |
| 2441 |
| Volume (dam) | | Space occupied by all materials in the dam. The volume of a dam includes the main fill, the riprap and the impervious blanket...... | | Similar Terms |
| 2504 |
| Cutoff buttress | | Cross wall projecting into the embankment from spillway abutments or power-house wall or other concrete wall extending through the structure in upstream and downstream directions...... | | Similar Terms |
| 2566 |
| Gravity method (two-dimensional method of analysis) | | A method for stress analysis of gravity dams assuming the structure of the dam to be composed of vertical cantilever elements that act independently of each other while the vertical stress varies linearly...... | | Similar Terms |
| 2567 |
| Slab analogy method | | A two-dimensional method of studying the non-linear distribution of stresses in a dam by considering the analogy between the stresses in a two-dimensional elastic body and the deflections of an unloaded slab of the same shape bent by forces and couples applied round its edges...... | | Similar Terms |
| 2568 |
| Lattice analogy method | | A three-dimensional method of analysing stresses in a dam by considering it a frame consisting of diagonally braced squares...... | | Similar Terms |
| 2569 |
| Trial load method | | A three-dimensional method of dam analysis in which the dam is assumed to be made up of two or more systems of elements; for arch dams - vertical cantilever elements and horizontal arch elements; and for gravity dams - vertical cantilever element, horizontal beam elements and a twisted structure system of vertical and horizontal elements. Each syst..... | | Similar Terms |
| 2570 |
| Amplified trial load method | | For arch dams it is an assumption that the water load is divided between the arch and cantilever elements, that the division may or may not be constant from abutment to abutment for each horizontal element and that the true division of load is the one which causes equal arch and cantilever deflections in all arches and cantilevers instead of at the..... | | Similar Terms |
| 2571 |
| Abridged trial load method, or Simplified trial load method | | Used for arch dam preliminary design work by using tables and curves for determining deflections of arches. Modified assumptions are made with regard to the foundation in this analysis which neglect (i) differences in elasticity of rock and concrete, (ii) the angle that the plane of the abutment makes with a vertical plane and (iii) certain seconda..... | | Similar Terms |
| 2572 |
| Trial load twist method (for gravity dams) | | It is based on the assumption that the water load is divided between a structural system made up of vertical and horizontal elements with each system occupying the entire volume of the dam. For ungrouted joints there are two systems, the cantilever structure and the twisted structure. The grouted joints have three systems, the cantilever structure,..... | | Similar Terms |
| 2573 |
| Finite element method | | A method, wherein a continuous system is represented as an assemblage of finite flat elements interconnected at a finite number of nodal points. The analysis of this idealised structure is then carried out by standard methods of structural analysis by determining the stiffnesses of individual elements and then superposing these to obtain the total ..... | | Similar Terms |
| 2575 |
| Elastic arch method | | A theory of arch analysis wherein the dam is divided into horizontal arch rings assumed to be independent of each other. It is possible to take into account various deformations caused due to elasticity, temperature change and shrinkage, abutment yielding or variable loads and arch forms...... | | Similar Terms |
| 2576 |
| Arch and crown cantilever method | | A preliminary method of analysis of arch dams when the distribution of load between arch and cantilever elements is assumed by adjustments of the deflections of the crown of each arch and the main cantilever section. It is then assumed that the load distribution found at this point is applicable to the entire structure and that the water loads are ..... | | Similar Terms |
| 2578 |
| Unit column method (for buttress dam) | | It is a method of designing a buttress dam evolved by Herman Shorer. It is assumed that the buttress comprises a series of hypothetical curved struts that transmit the water load to the foundations by uniform axial compression without interaction between struts. The axes of the curved struts are analogous to trajectories of first principle stress i..... | | Similar Terms |
| 2593 |
| Similar Terms |
| 2609 |
| Unit seepage force | | The measure of seepage force, equivalent to the product of the hydraulic gradient and the unit weight of water (or other fluid)...... | | Similar Terms |
| 2661 |
| Similar Terms |
| 2662 |
| Effective unit weight | | Unit weight of a soil that when multiplied by the height of the overlying column of soil gives the effective pressure due to the weight of the overburden...... | | Similar Terms |
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