Analysis of stress-strain state of plates made of crosslaminated timber reinforced with composite tapes

In our time, the construction industry is actively developing in various directions. Constructions with large cross-sections are being replaced by counterparts with reduced cross-sectionsusing various types of reinforcement.Cross-laminated timber (CLT) panels are a massive, multi-layered glued timber construction material. For high-rise building structures and wooden buildings, the use of CLT panels is the primary method for arranging floors and roofs. Layers oftimber are glued together under pressure, forming a virtually ready-made panel. The layers of timber lamellas are laid perpendicular to each other, transversely. The outer layers usually have the same orientation, while the internal layers, perpendicular to the outer ones, may consist of cheaper wood to savecosts. Most often, softwood is used for the production of such panels as the most affordable.However, the production of such panels requires significant material costs. Therefore, research in the  field of reinforcement of CLT panels to reduce their cross-section is relevant.Composite materials are leading in structural reinforcement now, as most of them have high resistance to various chemical influences, such as alkalis, acids, chlorides, sulfates, nitrates, and others.This allows them to be used both in industrial and agricultural construction, where there is a significant impact of the external environment on structures reinforced with composite materials, and in residential buildings, without harm to residents.After analyzing the stress-strain state through modeling in the LIRA CAD software package of CLT panels reinforced with composite strips and comparing them with similar panels without reinforcement, we can conclude that such materials canbe excellently combined with cross-laminated timber structures, allowing to increase the load-bearing capacity while reducing their cross-section.