Comparability of estimates of the impact of gunpowder and gas-dynamic explosions on the stability of buildings and structures

Abstract

A brief description of natural and artificial influences influencing the stability of buildings and structures is presented. Studying the seismic resistance of buildings and structures designed, under construction, erected, and in operation requires time to wait for seismic activity, which is not permissible; costs of manpower and resources, which is inappropriate. In this regard, a working hypothesis has been put forward that by artificially acting on soils with the help of detonation wave energy, it will be possible to induce vibrations, with the help of which it will be possible to study the behavior of building structures put into operation, the entire building and structure as a whole. The goal is set: - to investigate the behavior of structures under construction and in the operation of buildings and structures that perceive artificial vibrations caused by the detonation unit by acting on soils. To achieve this goal, tasks have been identified. A detonation (blast) wave is taken as a "tool" for force action. The theoretical foundations of the experiment are briefly presented and the developed scheme of a detonation tube and a shock wave with a general view of the installation causing detonation wave energy. A brief technique for carrying out field experiments is presented.

Metodology for checking the seismic strength of buildings based on existing norms

“…Various construction organizations, research and project institutes offer organizational and technological solutions for adding additional floors, expanding buildings, expanding erkers and loggias, Diamond and strengthening structures, creating energy savings in buildings, replacing engineering networks, repairing roofs, etc. However, not all recommendations of foreign construction engineers can be applied to the territory of the Respublka of Uzbekistan [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23].…”

“…They were subjected to spiritual decay. All these indicators indicate that the reconstruction of buildings is possible [2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

“…They are responsible and a number of important tasks are set for specialists to be solved and completed. [9][10][11][12][13].…”

“…At the same time, since September 1, 2022, the introduction of the procedure for obtaining conclusions on earthquake relations to objects belonging to Category IV (objects with the highest risk factor), the risk factor under which a new construction is planned in the seismic active zones of our republic, And since October 1, it is another aspect of recognition that the procedure for introducing proposals for the gradual introduction of new housing in the territory of the Republic into the local state authorities in the place of seismically weak and accident-prone housing, which, according to the results of which the period of operation has been completed, has been established and the practice of Starting in 2023, a series of construction planned or selected buildings and structures with a height of 9 floors or higher in the seismic active zones of the Republic, testing and inspection using vibrodynamic equipment or modern digitized instrumental equipment was established in order to increase the earthquake intensity, ensure quality and eliminate defects in advance [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23].…”

Enclosing structures of a porous structure with polymeric reagents

“…It was determined that for the porosity of the binder containing the K-9 additive to obtain Rtr / pore = 35.0 MPa for class B5 concrete at a given average density of 900-1050 kg/m 3 , it is necessary to introduce aluminum powder in an amount of 520-540 g/m 3 according to the indicated average density. To obtain a porous binder with K-9 for class B 7.5 concrete at a given average density of 1050-1100 kg / m 3 , respectively, 500-400 g / m 3 of aluminum powder were required [5][6][7][8][9][10][11][12].…”