Calculation of Enclosures of Defence Structures Based on the Quasi-static Method

The article shows the peculiarities of calculating the walls of defence structures according to Ukraine’s new regulatory documents. General information about the calculation of enclosures of defence structures by the direct integration of equations of motion, impulse method and quasi-static method is given. The peculiarities of determining the load from conventional weapons are indicated for each of the proposed calculation methods. For the direct dynamic calculation method, the parameters of the blast air wave pressure diagrams established for the relevant ammunition are used as the load. For the impulse method, the impulse values of the blast air wave are established for the suitable ammunition, and the appropriate form and time of its action are used. When using the direct integration of the equations of motion and the impulse method, performing dynamic calculations of spatial frames of buildings and structures is necessary. The calculation of walls of defence structures for quasi-permanent loads is considered in detail. An example of the calculation of shock blast waves from standard means of destruction of defence walls for quasi-constant loads is given. The methodology for determining the reinforcement of walls and ceilings of typical buildings of defence structures in calculating the impact of an air blast wave under the action of standard means of destruction is shown.