CALCULATION OF THE WOODEN BEAMS UNDER THE CONDITIONS OF SLANTING BENDING USING THE DEFORMATION MODEL

Abstract

The practice of designing building structures shows that bending is one of the most common types of deformation in construction. Oblique bend is a kind of direct bend in which the distribution of stresses in the cross section of the beam is much more complicated than the straight normal bend. The setting of moment for oblique bend is an important characteristic of the work of structures, since in this complex stress-deformed state, the outer fibers of wood are exposed to varying stresses of compression and tension.

The work of the most of today's known experimental researches of wood structures was studied for direct bending. In the current design standards of wooden structures the calculation of oblique bend is based on the rules of resistance of materials, which are valid only when the direction of the load passes through the geometric center of the cross-section of the element. Therefore, there is a need for a more profound study of oblique bend with the use calculation methods that take into account the actual work of such structures.

Oblique bend of wooden beams – the kind of deformation, in which the direction of the external load does not coincide with the main axis of the cross section of the element. Flexible stress-strain condition that occurs behind the oblique bend requires detailed research at various levels of loading of structures from the beginning of the application of the load and to the destruction. The setting of moment of bending elements is the main characteristic in the calculations for the first group of boundary states, so this study is relevant today.

In this article the method of calculating the bearing capacity of beams behind the slanting bend using a deformation model is developed. According to the developed method, the bearing capacity of the lacquered beams and their comparison with the magnitudes of destructive loads determined by the theoretical method are determined.