ABSTRACT
The theory and practice of calculating wooden log structures currently remains undeveloped due, obviously, to their lack of demand, since such structures are usually small and do not need to be calculated. There are, however, unique log structures – such as the Church of the Transfiguration of the Lord with a height of 40 m on the island of Kizhi, for the modern restoration of which such a calculation was very relevant. The article presents the results of numerical calculation analysis and comparison with full-scale measurements for the most problematic part of the structure construction. The most structurally responsible part of the structure needed to be calculated – a transitional structure made in the form of a quad, transferring loads from the middle octagonal frame to the lower one. The estimated estimation of the forces in the wooden elements was complicated by the inaccuracy of analytical solutions due to the complex geometry of the log structure, as well as the lack of proven approaches to modeling log elements in numerical solutions. The article presents the basics of the approach to the modeling of log elements and the results of calculations of the complex coupling of log structures of the church by the finite element method. Based on the calculations, the most rational solution for strengthening the quadrangular frame structure was identified and the conditions for its implementation were proposed.
