Changes have been carried out in the calculation method used to obtain the forces of footings “with external fixity”, for footings, pile caps, strap and tie beams.
The current design can differ from previous versions. Now, once the reactions at the base of the supporting elements of the structure are obtained (columns, shear walls and walls), a model is created will all the foundation elements “with external fixity” and its beams, represented by its stiffness matrix. The stiffness matrix, together with the loadcases defined as loads acting on the foundation (reactions that have been obtained), is resolved using frontal methods to obtain the displacements and forces of all the elements. By doing this, the stiffness of all the elements intervene and interact with one another.
