Короткий опис(реферат):
The article provides a methodology for calculating the torsion of an I-beam element
using its approximation in the form of a cross-rod system. The cross-sectional I-section is divided
into a finite number of longitudinal rods of rectangular section. These rods focus on their axial,
flexural and torsional stiffness. Longitudinal rods are connected by transverse vertical and
horizontal rods. The transverse rods imitate the local deformation of the longitudinal rods at their
contact with each other. In contrast to the previously proposed methodology, in order to reduce
the number of unknowns for creating the basic scheme of a statically indeterminate system, it is
proposed that not all transverse rods be cut, but only one step in the longitudinal direction. The
forces in the longitudinal rods determined from this calculation are applied to the rods of the next
step. The pitch of the transverse rods may be arbitrary. A method for determining the stiffness
parameters of the rods of an approximating system is shown. The advantages of the proposed
methodology are shown, which can significantly reduce the number of equations unknown in the
system, calculate elements for bending with torsion, and also take into account the change in
stiffness as a result of nonlinear work of materials and crack formation.
