Patent ID: 8661752

Claim:
A fatigue resistant foundation comprising: a horizontally prestressed concrete slab having a structurally continuous horizontal rebar grid for reinforcing the slab and a plurality of horizontal post tensioning elements therein for prestressing the slab, and a perimeter beam proximate the perimeter of the slab, a vertically extending central concrete pedestal having a plurality of vertical post tensioning elements, the pedestal integrally connected to the slab, a plurality of reinforced concrete ribs on top of and integrally connected to the slab with structural continuity between the rib and the slab, the ribs integrally connected to the pedestal, with structural continuity between the rib and the pedestal, at least one post tensioning element running through each rib and the pedestal for providing post tensioning stress in the ribs and pedestal and for connecting the ribs to the pedestal under post compression stress, such that the pedestal, slab and the ribs are connected to each other to form a monolithic foundation with a three dimensional network of post tensioning elements in the slab, pedestal and ribs keeping the foundation under multi-axial compression while resisting operating loads, and during normal and abnormal extreme, loads, thus linking the slab and the ribs to the pedestal under vertical, and horizontally eccentric post compression stress, with reduced multi-axial stress range amplitudes in the concrete and steel reinforcing.