Location

San Diego, California

Session Start Date

3-26-2001

Session End Date

3-31-2001

Abstract

On December 7, 1988 a disastrous earthquake with magnitude M=7.0 took place in the northern part of Armenia, during which in Giumry (former Leninakan) large-scale destruction of standardized buildings with epicentral distance 35 km was observed. This forced us to set a task: to find connection between large-scale destruction and some dynamic peculiarities of grounds on the territory of the city. The present article makes an attempt to explain the significance of the upper engineering-geological stratum (20-30 m) and that of the lower massive lake-river formations. Basing ourselves on a great number of instrumental observations we tried to compare prevailing periods of ground microthremors with frequency spectra of the Spitak earthquake main shock and its aftershocks and to reveal connection between them in order to ascertain the significance of own prevailing periods of grounds on the territory of Giumry in the large-scale destruction during the main shock as well as to prove that they didn’t manifest themselves during the event. The obtained results can be applied to drawing up of new seismic microzonation maps not only for Giumry, but for an territories of other cities as well, which are situated on massive lake-river formations. Besides the results can benefit creators of normative documents on seismostable building.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Meeting Name

Fourth Conference

Publisher

University of Missouri--Rolla

Publication Date

3-26-2001

Document Version

Final Version

Rights

© 2001 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Mar 26th, 12:00 AM Mar 31st, 12:00 AM

Comparison of Frequency Spectra for Micotremors, After Shocks (M=2.5-4.7) and the Main Shock of the Spitak Earthquake Obtained on Massive Lake-River Formations in the Region of Giumry (Armenia)

San Diego, California

On December 7, 1988 a disastrous earthquake with magnitude M=7.0 took place in the northern part of Armenia, during which in Giumry (former Leninakan) large-scale destruction of standardized buildings with epicentral distance 35 km was observed. This forced us to set a task: to find connection between large-scale destruction and some dynamic peculiarities of grounds on the territory of the city. The present article makes an attempt to explain the significance of the upper engineering-geological stratum (20-30 m) and that of the lower massive lake-river formations. Basing ourselves on a great number of instrumental observations we tried to compare prevailing periods of ground microthremors with frequency spectra of the Spitak earthquake main shock and its aftershocks and to reveal connection between them in order to ascertain the significance of own prevailing periods of grounds on the territory of Giumry in the large-scale destruction during the main shock as well as to prove that they didn’t manifest themselves during the event. The obtained results can be applied to drawing up of new seismic microzonation maps not only for Giumry, but for an territories of other cities as well, which are situated on massive lake-river formations. Besides the results can benefit creators of normative documents on seismostable building.