Numerical Study of the Stress-Strain State of a Modified Wooden Beam
Journal Title: Lesnoy Zhurnal (Russian Forestry Journal) - Year 2022, Vol 11, Issue 3
Abstract
Preservation of wooden architecture monuments requires special attention since during their operation for 100 years and more wooden structures are exposed to environmental influences resulting in weakening their bearing capacity. The use of external reinforcement systems for buildings of historical value leads to a loss of architectural look. The proposed method of restoring the bearing capacity of the destructed wooden beams in the support zones is based on modification with a polymer composition. We have considered 3 types of pine beams: destructed, modified in the support zones; wooden, weakened by destruction; “healthy”. Numerical calculation of beams with a length of 6 m and a cross-section of 100×200 mm is performed in the Lira software package. The calculation model of the beams considered was created by adapting the initial data for the working environment of the software package used. The computational model is set as a three-dimensional body obtained by triangulation and “extrusion” of beam projection section. Shear stresses in the supporting zone, as well as vertical movements of the beams have been determined according to the developed method of calculation of wooden beams. The parameters of the modified beam and the reference “healthy” structure were compared. Shear stresses in the strengthened beam are 15–17 % higher than in the “healthy” beam. It was found that the strength of the destructed beam modified on supports increased by 16–18 % compared to the destructed beam. The boundary conditions for the modification of destructed wooden beams in the support zones to restore their bearing capacity have been determined on the basis of the obtained results. If the loss of bearing capacity is more than 35 %, then this method is not recommended due to the expediency of replacing such structures.
Authors and Affiliations
Danila A. Chibrikin, Mikhail V. Lukin, Anastasiya V. Lukina, Tatiana V. Tyurikova, Svetlana I. Roshchina
Keywords
Related Articles
- EP ID EP704913
- DOI -
- Views 117
- Downloads 0
features of the Structure of Pine Stands on Bolshoy Solovetsky Island
The studies were carried out on Bolshoy Solovetsky Island in the White Sea. The research purpose is to identify the features of pine forests in the most frequent growing conditions on the island. For this purpose, 34 sam...
Effect of Addition of Chopped Needles on the Fiberboard Quality Indicators
Until recently, only the trunk of a tree was recognized as valuable in the forest industry, and everything else, including the crown, was considered waste. Logging wastes cluttered felling sites and created a favorable e...
Organic Carbon Stocks in the Forest Soils of Northern Mongolia
Soil organic carbon (SOC) stock and its variation on the regional and large spatial scales are critical for estimating the global SOC inventory and predicting further changes. This study was aimed at estimation of the SO...
The Peculiarities of the Operation of Logging Roads in the Spring-Winter Period
Seasonal roads are not capital construction objects. Unlike all-season ones, they can be of summer and winter action. During the transport development of forests, both allseason paved roads and temporary unpaved roads ar...
Response of Annual Ring Width and Latewood Content of Scots Pine to Weather Conditions in Provenance Trials
Tree-ring width and latewood content were studied to assess the response of wood to growing conditions. Samples were taken from the trees of six Scots pine climatypes with contrast origin, grown in the conditions of prov...