METHOD FOR PREDICTION OF DAMAGE TO BUILDING STRUCTURES OF BUILDINGS AND STRUCTURES UNDER VIBRODYNAMIC IMPACTS TRANSMITTED THROUGH THE GROUND ENVIRONMENT, AND WAYS TO ELIMINATE THEM

Abstract

A method for determining the possibility of damage to the building structures of buildings and structures in the case of transmission of vibrodynamic effects on them through the foundation from external vibration sources is proposed. The essence of the technique is to determine the maximum vibration speed of the foundation and the soil in front of it by the finite element method, followed by a comparison of the obtained value with the limited vibration speed. Based on this comparison, 4 possible options are considered: there are no damages, minor, significant or critical defects appear. In the last 3 cases, measures are taken to protect building structures from vibration. 3 variants of vibration isolation are considered, which allow to reduce the rate of vertical oscillations by more than 80%: installation of a horizontal inertial barrier in the form of a deepened concrete slab; installation of a vertical barrier in the form of adjoining boreholes filled with easily compressible materials or cased with gas-filled cylinders under pressure; a combination of these methods. It is shown that the use of these methods of vibration isolation makes it possible to avoid damage to buildings in case of exceeding the limiting speed of vibrations.