Critical Evaluation Of Near-field Seismic Records
In Greece
Author(s)
C. C. Spyrakos, Ch. A. Maniatakis & J. Taflambas
Abstract
The study of seismic records characterized as \“near-field” ground motions is
increasingly drawing more attention. It has been recognized that accelerograms
obtained in recent years close to the source of strong earthquakes reveal
exceptional features that challenge widely held concepts about the nature of
strong ground motion. This study presents systematic processing and evaluation
of over 860 records of strong ground motions in Greece in order to identify
\“near-field” features with the aid of damage potential parameters. The findings
serve as a basis to evaluate the adequacy of the current aseismic code to specify
seismic demand. In addition \“well known” damage potential parameters are
critically evaluated to characterize \“near field” records.
Keywords: seismic records, near-field ground motions, aseismic codes.
1 Introduction and source of data
Sources for the present investigation are the databases of the Geodynamic
Institute (G.I.), of the National Observatory of Athens (N.O.A.) and Institute of
Engineering Seismology and Earthquake Engineering (I.T.S.A.K.). The Strong
Motion Database (NOA-SMDB) of the G.I. includes all the data concerning the
strong motion network of the Institute for the period 1973 – 1999. The database
includes 183 corrected and 183 uncorrected records of seismic events. Each
record includes acceleration, velocity and displacement for the three components
of the corresponding event. The core of the database’s structure comprises three
relations called Quake, Record and Station presented with different ways for the
investigation convenience. Briefly we mention that; a) each record includes
information such as the station name, the site, the component name and code, the
Keywords
seismic records, near-field ground motions, aseismic codes.
Related Book
Other papers in this volume
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