Kurash S. Mathematical modeling of the reaction of buildings and structures to explosive effects

The aim of the dissertation is the mathematical modeling of the response of buildings and structures to military and industrial explosions, the development of a comprehensive assessment of the decline in their life expectancy. The actual scientific and applied problem of the development and software implementation of a hybrid semi-natural system, which includes the determination of the composition, structure, configuration and verification of the computer model of multi-story buildings (taking into account their current technical condition), which were affected by hostilities or regular industrial explosions, was solved; preparation of primary information using experimental methods and equipment for non-destructive control of building structures (correct setting of initial boundary conditions); in-depth interpretation of the results of mathematical modeling in order to assess the residual resource of buildings and structures. For the first time, a model of a hybrid semi-natural system of mathematical modeling of VAT of buildings and structures was developed, taking into account their current technical condition (damage and destruction as a result of hostilities or regular dynamic effects (industrial explosions)), which includes setting up and verification of the computer model with a mandatory definition of its composition and structure. For the first time, the algorithmic organization of mathematical modeling of the stress-strain state of multi-story buildings damaged as a result of hostilities was implemented with experimental refinement of the initial boundary conditions to ensure the correct preparation of primary information using nondestructive testing methods. The direct dynamic method of calculation of frame multi-story reinforced concrete buildings under dynamic sign-changing loads due to the impact of missiles or projectiles has been generalized, the interpretation of calculation results has been improved and deepened in order to use them to forecast the residual resource of buildings. Scientific and methodological developments of the dissertation work were implemented during the development of DBN V.1.2-12-2008. "Construction in densely built-up conditions. Safety requirements" and in construction practice.