Features of the shear analogy method for calculating the bending strength of clt panels

Abstract

Problem statement. The strength of CLT panels by bending is usually calculated by the γ-method, the Tymoshenko method and the method of shear analogy. The latter is covered in this paper and provides strength analysis by considering the CLT panel as a system of longitudinals connected by a pliable transverse layer of boards. Depending on the configuration of the components of the cross section, the rigidity of the boards is taken into account. Rotation of the cross-sections corresponds to classical Bernoulli theory. The shear analogy method corresponds to the γ-method in the context of symmetric cross sections and is considered as an approximate approach that produces an approximate solution. The purpose of the article is a theoretical analysis of the landslide analogy method used to calculate the strength (PSD) or CLT panels in bending. As the shear modulus of wood and building materials based on it have a significant difference between the shear modulus and elastic modulus, the PCD panel can be considered as a beam consisting of two flexibly connected transverse layers (beam A and B). Thus, the theory of Bernoulli beams is used to determine the bending deformations elements taking into account deformations of each layer of boards. Conclusions. The shear analogy method yields accurate results compared to a symmetrical cross section in two or three parts, and unlike the γ-method, it takes into account arbitrary systems and loads. The determined effect of concentrated loads and internal supports for non-intersecting beams is relatively accurate, and the shift analogy method can be considered as an exclusive approach that can sufficiently determine the existing maximum stresses under bending.