Support grid

A girder grating is a three-dimensional bar structure that can be calculated using certain assumptions.

Support grids consist of several bars that lie in a horizontal plane and are held by several spatial supports. The basic assumption for support grids is that loads only act perpendicular to the grate plane. The calculation is therefore simplified by the elimination of the horizontal bearing forces and the clamping moment around an axis perpendicular to the grate. The loads on the bars are thus reduced to bending and transverse force , each perpendicular to the plane and torsion .

The support forces, and from them the internal forces of a statically determined girder grating, can be calculated from three equilibrium conditions, analogous to flat structures . If a grid were calculated in the general, three-dimensional case, however, six equilibrium conditions would have to be met.

literature

• Karl-Eugen Kurrer : History of Structural Analysis. In search of balance , Ernst and Son, Berlin 2016, pp. 606–611 and p. 616, ISBN 978-3-433-03134-6 .