MODELING OF SPAN WOOD-FOAM CONCRETE STRUCTURAL ELEMENTS UNDER LOAD

Abstract

Energy efficiency of buildings is a challenge facing the construction industry today, along with the reliability of buildings under construction and their maximum cost reduction. Cellular concrete can be confidently attributed to this type of material. Cellular concrete is a type of artificial stone material with a porous structure. During the reconstruction and restoration of buildings, it is often necessary to combine different materials in one section. Therefore, structural elements that combine the strength and durability of one material with the textural appeal and lightness of another would be interesting and appropriate in such circumstances. Such a combination, which can be used in span structures, includes such seemingly incompatible materials as concrete and wood. The concrete part of such an element can be made not only of heavy concrete, but also of cellular concrete. This design of span structures allows them to be used inside the building without additional expensive finishes. Such structures are well perceived visually. The current research and development efforts are mainly concerned with structural elements made of homogeneous construction materials, such as reinforced concrete, metal, wood, polymer composite materials, etc. Scientists and manufacturers pay little attention to the study of structures that combine seemingly incompatible properties in one section. Therefore, such structures are not widely used in construction practice. The main objective of the study was to substantiate the possibility of using different materials in one section of a span structure. It is proposed to use a wooden board placed in the most stretched part of the cross-section of the wood-foam concrete beam as the working reinforcement of the beam. This, in turn, makes it possible to use such a beam as a span element with sufficient strength and thermal characteristics at a minimum cost. This solution also allows the wooden part of the structural element to be used as an element of fixed formwork.