Research of the Stress-Strain State of Glued Wooden Structures After Prolonged use in Various Extreme Conditions

Abstract

Glued wooden structures for example beams, frames, archs had been used in the territory of the Arkhangelsk region in the period since the 70s to the 90s years of the XX century for the purpose of industrial and agricultural assignment as load-bearing structures of the coating. Today their age is 30-40 years. Such a period of time makes it possible to evaluate the technical condition of structures from the point of view of durability and to identify the main errors and shortcomings when design, construction and operation of glued wooden structures. The article presents the results of the survey of wooden glued structures coatings for various purposes: Ice rink, swimming pool, production hall with challenging temperature-humidity conditions. The survey was identified damage in beams in the form of degradation of the wood due to lesions wood-destroying mushrooms, longitudinal cracks in the glue seam, and damage by fire. In most cases, the cause of damage is the improper operation of buildings. Are most common damage have been identified longitudinal cracks in glue lines. Influence of cracks on the stress-strain state of glued wooden structures is addressed. The method for solving a problem of accounting for disbonds in a glued wooden structures is invited.