Prokon Structural Analysis And Design 2.5.17 Crack
Using the software, a 2-D structural analysis was performed. A typical cross-section is shown in Figure 6. This analysis showed that the outer wall was experiencing an axial compression as a result of the hydrostatic pressure. The wall acted in compression as a result of the requirement that the concrete around the water conduits must hold the same water pressure as the dam itself. The reinforcing was stressed to the same tension as the outer wall. This application of structural design to a real structure is illustrated in Figures 7 and 8 below.
A rectangular cross-section was used for analysis purposes. For the 3-D numerical simulation a similar type cross-section was considered appropriate as the most critical area to failure for the Massingir Dam bottom outlet works is the rectangular shaped area between the buttresses that define the upper chamber to the rectangular opening to the lower chamber.
Under the US design code there is no minimum dead load in reinforced concrete dam structures. However, for a retrofit structure, in addition to a minimum live load, the contractor must be aware of the minimum dead load and the expected load increases upon which the contractor should base the design of the retention pond. For this reason, the live and dead loads in the reinforcing should be at least slightly larger than those for the minimum loads.
Concrete dam design requires the reinforcement to carry both live and dead loads during the life of the dam. This means that the dry internal reinforcement and wet internal reinforcement will carry a combined live and dead load. The live loads include the compression of the floor slab, the dead loads are the reaction force acting on the dam as a result of hydrostatic pressure, gravity loads and earth pressure.