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

References

• Adampira, M., Alielahi, H., Panji, M. and Koohsari, H. 2015. Comparison of equivalent linear and nonlinear methods in seismic analysis of liquefiable site response due to near-fault incident waves: a case study. Arab Journal Geoscience, 8:3103–3118; DOI 10.1007/s12517-014-1399-6.
• Day, R. 2012. Geotechnical Earthquake Engineering Handbook. McGraw-Hill Companies, Inc.
• Edincliler, A. and Calikoglu, M. 2016. Effects of earthquake characteristics on site response analyses. Fourth International Conference on New Developments in Soil Mechanics and Geotechnical Engineering. Near East University, Nicosia, North Cyprus.
• Edincliler, A. and Calikoglu, M. 2016. Comparison of Site Response of Unimproved and Improved Soils Using DEEPSOIL. Twelveth International Congress on Advances in Civil Engineering. ACE 2016. Bogazici University, Istanbul, Turkey.
• Hashash, Y.M.A., Dashti, S., Romero, M.I., Ghayoomi, M. and Musgrove, M. 2015. Evaluation of 1-D seismic site response modeling of sand using centrifuge experiments. Soil Dynamics and Earthquake Engineering, Volume 78:19–31.
• Hashash, Y.M.A., Phillipes, C. and Groholski, D. 2010. Recent Advances in Non-linear site response analysis. Fifth International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics, San Diego, California, pp:1-21.
• KOERI, 2014. Earthquake Report 24 May 2014 Northern Aegean Sea. Bogazici University, Kandilli Observatory and Earthquake Research Institute (KOERI).
• KOERI, 2017. 21 Temmuz 2017 Kos Adası - Gökova Körfezi Depremi İvme Kayıtlari Ve Özellikleri . Bogazici University.
• Seed, H.B., Tokimatsu, K., Harder, L.F. and Chung, R. 1985. Influence of SPT procedures in soil liquefaction resistance evaluations. Journal of Geotechnical Engineering, 111(12):1425–1445.
• Seed, H. B., and Idriss, I. M. 1971. Simplified Procedure for Evaluating Soil Liquefaction Potential. Journal of the Soil Mechanics and Foundations Division, ASCE, 97;9,1249–1273.