Nonlinear Site Response Analysis for the Izmir Region: A Case Study

Year 2018, Volume: 2 Issue: 2, 51 - 58, 01.12.2018

Ayşe Edinçliler , Murat Çalıkoğlu

Abstract

Izmir city is mostly located on
deep alluvial sediments capable of amplifying ground motions during an
earthquake.  Soil layers composed of sand
with a high groundwater table are very common in these regions. The three areas
of Karşıyaka, Mavişehir and Bornova in Izmir city are seen as particularly
interesting due to the large amounts of alluvial fan, plain and delta deposits
expected in these areas. Site effects should be considered when specifying
ground shaking levels for seismic designs to prevent earthquake damages.
One-dimensional site response analysis is widely used to quantify the effects
of soil deposits on propagated ground motions in research and practice. In this
study, one-dimensional ground response analyses for a specific site which is
known as liquefiable site in Izmir were performed with using a nonlinear method
based on effective stress modelling in time domain. In order to estimate the
ground response of liquefiable site, DEEPSOIL software which is a
one-dimensional site response analysis program was used. Results of the two
original sites under two different earthquake motions are given in terms of
peak ground accelerations (PGA) and spectral accelerations.

Keywords

Site response, liquefaction, DEEPSOIL, nonlinear analysis, earthquake

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