MODELING OF CROSS-SECTIONS OF WOODEN ELEMENTS FOR DIFFERENT OPTIONS AND PERCENTAGES OF REINFORCEMENT

Abstract

A detailed analysis of literary sources on the study of strengthening of wooden elements by various methods was carried out. The calculation sequence of wooden elements reinforced with glued metal elements is proposed. An algorithm for determining the "moment-curvature" graph using optimized wood deformation diagrams is proposed. Calculations were carried out for various forms of beam cross-sections. Calculations of the cross-section were carried out and "moment-curvature" graphs were determined for different options for the reinforcement of the wooden element (with the reinforcement of the compressed zone, the stretched zone, as well as with the reinforcement of both zones). Schedules were determined with different percentages and methods of reinforcing elements. It was established that the best result of reinforcement occurs when reinforcing compressed and stretched zones, less effective when reinforcing a beam in a compressed zone, the smallest effect of reinforcing a stretched zone. To simulate the work of reinforced wood, the mechanical characteristics of "pine" wood with a moisture content of 12% and metal, namely the characteristics of A400S reinforcement, were used. Moment-curvature plots are given for cross-sections with different percentages of reinforcement and reinforcement in compression and tension zones. An increase in the load-bearing capacity of a bending wooden element due to various options and percentages of reinforcement reinforcement is presented. It is necessary to note the change in the shape of the "moment-curvature" graph with symmetrical reinforcement, namely, with an increase in the percentage of reinforcement, its shape approaches a straight line. Based on the analysis, conclusions were drawn. The volume of further experimental and theoretical research on this issue is given.