AMPLITUDE - FREQUENCY CHARACTERISTICS OF SEISMIC IMPACT ON THE BUILDING WITH THE GROUND BASE AND THE COMPARISON OF THEORETICAL ESTIMATION WITH THE REAL EVENTS FROM THE DATA BASE SMDB CGI

Abstract

The multilayer contact boundary-value problem of the seismic vibrations of the system, consisting of the elastic-viscous layers under the building, is set and solved. Boundary-value problem consists of n differential equations describing transversalshear vibrations of soil layers. On each contact surface of soil layers differential equations are interconnected by two boundary conditions, which express the equality of displacements and shearing stresses in the adjacent of soil layers. The last deep layer is considered semi-bounded. At infinity the limitedness of displacement and partial derivatives of displacement is stipulated.The presented boundary-value problem is solved by the method of the forward and reflected waves superposition. Calculation formulas for the seismic vibrations amplitudes of each layer, including for the ground surface are obtained.The corresponding program of calculation on the computer is created. The frequency characteristics evaluation of the seismic impact on the building is carried out. The comparison of results with the parameters of real earthquakes from the data base SMDB CGI is carried out.