Bashynskyi Y. Influence of dynamic loads from subway on stress-strain state of building structure

The purpose of the thesis is to determine the stress-strain state of responsible constructions of buildings under the vibrodynamic influences from the subway, that can lead to partial or complete destruction of load-bearing structures. On the basis of the experimental and theoretical researches, the scientific problem was solved. It consists in the development of methodology for estimation vibrodynamic influence from the subway, that is used for the retrospective nonlinear analysis of the building to which this influence applies. The practical value of the work consists in: take into account the factors that can influence the formation of stress-strain state of load-bearing structures under vibrodynamic impacts; provide recommendations for modeling the process of subway impact on load-bearing structures for future consideration in the design. Forecast of stress-strain state in process of designing and reconstructing of buildings allows us to estimate the possible adaptability of buildings and structures to vibrodynamic effects, in addition to traditional methods for determination of the constructive safety by the boundary states. The results of the work were used to provide recommendations in the buildings design in zone of negative impact from subway vibration on bearing structures and for the development of basic methods for protection of structures. The author suggested: - for new construction of civil buildings in zone of influence from the subway it is recommended: to use the methodology for calculating vibrodynamic loads with taking into account the time factor; to protect load-bearing structures of buildings with damping devices, or to use the damping properties of the soil; - for buildings under reconstruction, it is recommended to install protective shields in the soil to prevent the negative impact from the subway on the load-bearing structures of buildings.