TITLE:
Integration of Geophysical and Geotechnical Soil Characteristics for Local Site Seismic Design in Georgia
AUTHORS:
N. Jorjiashvili, M. Gigiberia, I. Shengelia, M. Otinashvili
KEYWORDS:
Seismic Hazard, Peak Ground Acceleration, Response Spectra, Ground Motion, Geophysical Investigations
JOURNAL NAME:
Open Journal of Earthquake Research,
Vol.7 No.2,
May
31,
2018
ABSTRACT:
Recently, number of new constructions and engineering projects increased in
Georgia, especially in Tbilisi, the capital of Georgia. Because of significant
seismic activity of Caucasus region, seismic hazard assessment is very important
issue for seismic-designing of engineering projects. Due to modern
building codes, complex study of the local area is crucial for proper design of
any type of constructions. Among them, following studies should be performed:
probabilistic seismic hazard assessment, geological, geotechnical,
geophysical, etc. After that, all information should be merged to each other
and taken into account while designing of the project. In this paper, location
of one construction site was selected as an application of complex study in
order to show how can be merged different studies to each other. At the beginning,
geological survey (well drilling) and geotechnical studies including
laboratory tests were performed. Then geophysical profiling and downhole
tests in wells were done by obtaining direct and shear wave velocities including
estimation of physical-mechanical parameters. Next, probabilistic seismic
hazard assessment and site-depended seismic hazard assessment were performed
based on all information obtained by different studies. As a result, influence
of local soil amplification on seismic hazard assessment is shown for
the study area.