BEAM FOR PRODUCING A METAL FRAMEWORK

摘要

A beam provided with at least one first part that has a main body with an overall U-shaped straight cross-section provided with lateral flanges protruding outwards from the sides of the U, the main body further comprising a bottom part as well as two wings forming the sides of the U.;The central portion of the main body defines cells working under tension and under compression, respectively, on either side of a neutral main bending axis formed by two transition zones, which are each located between the U-shaped element and a lateral flange.;The bottom part of the main body comprises at least one transition formed by a curvature discontinuity. And at least one wing comprises at least one transition formed by a curvature discontinuity.

主权项

1. A beam provided with at least one first part that has a main body with an overall U-shaped straight cross-section (U) provided with lateral flanges protruding outwards from sides of the U, the main body further comprising a bottom part as well as two wings forming the sides of the U, comprising:
a central portion of the main body defining cells adapted to work under tension and under compression, respectively, on either side of a main neutral bending axis formed by two transition zones, which are each located between the U and a lateral flange; the bottom part of the main body comprising one or more stiffening ridges, directed inwards into the U; at least one of the wings comprising at least one transition formed in the shape of a double rounded elbow including an inflexion point, or a transition forming a rectilinear segment that joins each of the ends of the at least one of the wings forming an angle between the rectilinear segment and the ends of the at least one of the wings; and at least one lateral flange comprising at least one zone with a lower mechanical strength than the rest of the main body, the at least one zone of lower mechanical strength being realised on the same side of the U as the wing, which comprises the at least one transition.