Anti-seismic constructions, in particular constructions with basements forming anti-atomic shelters

A construction liable to be subjected to seismic waves comprising a superstructure and buried sub-foundation elements forming anti-atomic shelters in which the buried sub-foundation elements comprise at least three independent elements having a mechanical strength such that each of them is capable of resisting without damage the seismic wave of maximum intensity and to sustain at least a third of the weight of the superstructure, the superstructure resting on the sub-foundation elements through fulcrums and being mechanically resistant when isostatically supported on three non-aligned fulcrums distributed in a random manner amongst said fulcrums, the shearing stress of the connections at the superstructure fulcrums on the elements being lower than the global shearing stress of the structure elements leading to said fulcrum, each sub-foundation element having a mechanical strength such that it is capable of resisting without damage the seismic wave of maximum intensity and any two of said sub-foundation elements being spaced from each other a distance at least equal to the compressibility of a thickness of ground equal and parallel to their larger horizontal dimension under the maximum pressure developed by said seismic wave of maximum intensity.