Abstract: Device (1) able to limit the amplitude of the relative movement of two elements of a civil engineering structure and for absorbing the deformation energy of this structure when the latter is subjected to an accidental stress. The device (1) includes: at least one portion able to undergo a plastic deformation at the time of the relative movement of the two elements of the structure, a guiding device for guiding the plastic deformation of the portion able to undergo a plastic deformation, the portion able to undergo a plastic deformation and the guiding device forming a single piece element.

Abstract: The metal girder element (5, 6) possesses a section of web (7, 10) fixed along its longitudinal edges respectively to a section of upper flange (8) and to a section of lower flange (9). Each section of flange (8, 9) of this element (1, 2) possesses, on its outer surface opposite the web (7, 10), connection elements (12, 13), the number, dimensions and positions of which are predetermined in such a way that said connection elements (12, 13) are capable of supporting the driving stresses of said section of flange (8, 9) via the concrete during the designed deformations of the structure thus formed.