The various methods used for the design of concrete gravity dams are as follows:
Stability analysis method
Trial load twist method
Joints keyed but not grouted
Joints keyed and grouted
Slab analogy method
Lattice analogy method
Finite element method
Zoned (multiple-step) method of determining profile of dam
Single step method
Two procedures of design will be discussed in this course: multiple-step method and single-step method.
Multiple step method of determining profile of gravity dam
This method deals with designing the dam joint by joint (block by block) beginning at the top and making each joint confirm to all gravity dam design requirements. The procedure results in a dam with polygonal face that may be smoothened up for appearance with no appreciable change in stability or economy. The multiple-step method is almost always used for the final design of dams with a height that does not encroach greatly on Zone V.