Primary structure of aircraft fuselage comprising provisions for early rupture of the floor support struts to increase energy absorption in case of a crash

摘要

The structure (40) has a floor structure (16) with lateral ends connected to circumferential frames (42a, 42b), and struts (50a, 50b) for supporting the floor structure. Each strut includes a lower end (56) fixed on one circumferential frame, and an upper end (54) fixed on the floor structure. A failure-initiating element (58a) includes a fastening arrangement by which the failure-initiating element is fixed on the circumferential frame away from the lower end of the strut, another fastening arrangement by which the element is fixed on the strut away from the ends of the strut.