RATIONALE OF THE EFFICIENCY OF APPLICATION MODERN MATERIALS IN FENCING STRUCTURES

Abstract

To investigate the nature of stress formation in the soil massif and its effect on the construction of the pit enclosure, depending on the types of construction materials and their strength characteristics. Methodology. Application of Midas GTS NX software for forming a stress-strain state of a soil array around a load-bearing enclosure based on finite element theory. Findings. According to the results of modeling, the regularities of changes in the deformation of the surrounding soil massif from the immersion depth of the load-bearing enclosure structure, the dependence of bending moments, transverse and longitudinal forces on a certain mark of the enclosing structure, and the composite concrete enclosure construction. Originality. On the basis of mathematical modeling, the bending moments of longitudinal and transverse forces are determined from a certain depth mark of concrete, reinforced concrete and composite concrete enclosing structures, and it is established that the greatest values of bending moments and longitudinal forces are at a depth of 6.5 m transverse forces are at a depth of 6 m. The highest bending moment is 56 kN*m - for reinforced concrete structure, the slightly smaller bending moment in the composite concrete structure is 33 kN*m and the smallest bending moment in the concrete structure is 2.55 kN*m. A similar pattern is observed for longitudinal and transverse forces having values of 87 kN and -38 kN for reinforced concrete structures, 83 kN and -28 kN for composite concrete structures, 41 kN and 2.7 kN for concrete structures. Practical implications. On the basis of the obtained results, the expediency of the use of reinforced concrete and composite concrete enclosing structures, deformations of which are within the permissible values and are respectively: from 13,85 mm. up to 34.7 mm for composite concrete construction; from 14.13 mm. up to 35.93 mm for reinforced concrete structure, which is confirmed by the test of cracks formation. Therefore, the use of non-metallic composite fittings in load-bearing enclosure structures is promising in modern construction.