Tie device for transmitting force between two structural elements

A tie device for use between first and second elements (10, 20) of a civil engineering structure, the tie device being suitable for enabling said first and second structural elements (10, 20) to be displaced relative to each other during slow movements, and for preventing said first and second structural elements (10, 20) from being displaced relative to each other during rapid movements, said device including a cylinder (30) which is stationary relative to said first structural element (10) and which defines two chambers (31, 32) that contain a fluid substance and that are interconnected via an orifice (39), said tie device being characterized in that said cylinder (30) includes a wall (33) that separates said two chambers (31, 32), each chamber being defined at its end remote from said wall (33) by two moving pistons (37, 38), said two moving pistons (37, 38) being secured to said second structural element (20).