Prediction of Synthetic Seismograms and Accelerograms  for Two-Layer Basis Beddings

Eduard Khachiyan; Levon Levonyan; Naira Egnatosyan

doi:10.54338/27382656-2024.7-09

Authors

Eduard Khachiyan National University of Architecture and Construction of Armenia https://orcid.org/0009-0008-6537-2389
Levon Levonyan National University of Architecture and Construction of Armenia https://orcid.org/0009-0005-7128-7971
Naira Egnatosyan National University of Architecture and Construction of Armenia https://orcid.org/0009-0002-3274-8825

DOI:

https://doi.org/10.54338/27382656-2024.7-09

Abstract

A method has been developed for predicting strong ground motion displacements and accelerations, assuming that an earthquake is an instantaneous mechanical rupture of the Earth’s crust. The method uses derived theoretical formulas to calculate all three parameters of the ground motion: displacements, velocities, and accelerations during strong (with a magnitude of M 6.0) earthquakes for any non-homogeneous (multilayer) ground beddings with various physical and mechanical characteristics – thicknesses, densities, and shear moduli – and at a certain distance from the expected earthquake’s rupture. The example provided involves the results obtained for a number of two-layer heterogeneous site variants in seismic categories I-IV at the magnitude of M=7.0 and distance of 15 km from the expected earthquake’s rupture. A comparison of the results obtained for actual heterogeneous foundation beddings with the equivalent homogeneous beddings showed divergences by 1.3-1.6 times, depending on the number of higher mode oscillations considered. Recommendations are provided for simplified calculation of seismograms and accelerograms for heterogeneous foundation beddings, with a certain correction of calculation results for equivalent homogeneous beddings.

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Author Biographies

Eduard Khachiyan, National University of Architecture and Construction of Armenia

Doctor of Science (Engineering), Professor, Academician of NAS (RA, Yerevan) - National University of Architecture and Construction of Armenia, senior researcher at the "Maintenance and Development of the Research Laboratory of Construction and Architecture", Institute of Geological Sciences, NAS

Levon Levonyan, National University of Architecture and Construction of Armenia

Doctor of Philosophy (PhD) in Engineering (RA, Yerevan) - National University of Architecture and Construction of Armenia, Associate Professor at the Department of Mathematics, Structural Mechanics and Physics

Naira Egnatosyan, National University of Architecture and Construction of Armenia

Doctor of Philosophy (PhD) in Engineering (RA, Yerevan) - Institute of Geological Sciences, NAS, National University of Architecture and Construction of Armenia, Associate Professor at the Chair of Heat and Gas Supply and Ventilation

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