Procedure vibration damping strut and associated system

Procedure vibration damping of at least one pair of adjacent struts (4a, 4b) of a building (1), wherein adjacent struts of said pair are joined by a damper (6), characterized in that said damper (6) has a first firmness in response to a tensile stress and a second firmness in response to a compressive stress, the first over the second firmness firmness.