Footing Design of Shear Wall per ACI 318-14 - Engineering Society

The criterion for the design of foundations of earthquake resisting structures is that the foundation system should be capable of suppo...

Footing Design of Shear Wall per ACI 318-14


The criterion for the design of foundations of earthquake resisting structures is that the foundation system should be capable of supporting the design gravity loads while maintaining the chosen seismic energy dissipating mechanisms of the structure. 
The foundation system in this context includes the foundation structure, consisting of reinforced concrete construction, piles, caissons and the supporting soil. It is evident that for this criterion a suitable foundation system for a given superstructure can be conceived only if the mechanisms by which earthquake actions are disposed of are clearly defined. 

In most structures inelastic deformations during large earthquakes are expected. Consequently for these structures provisions are to be made for energy dissipation, usually by flexural yielding. It is vital that energy dissipation be assigned by the designer to areas within the superstructure or within the foundation structure in such a manner that the expected ductility demands will remain within recognized capabilities of the selected components. 
It is particularly important to ensure that any damage that might result in the foundation structure does not lead to a reduction of strength that might affect gravity load carrying capacity.
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