Nonlinear and Equivalent Linear Site Response Analysis for the Bodrum Region

Year 2018, Volume: 2 Issue: 2, 59 - 68, 01.12.2018

Ayşe Edinçliler , Gözde Sezgin Tuncay

Abstract

The
change in the intensity and the frequency content of the motion due to the
propagation of seismic waves in soil deposits has a direct impact on the
response of structures during earthquake events. In most cases, One dimensional
(1D) site response analysis is performed to assess the effect of soil
conditions under ground shaking. Frequency domain equivalent linear and time
domain nonlinear analyses are the most common approaches for performing 1D
seismic site response analysis. The Aegean region and the surrounding area are
considered to be one of the most seismically active regions of the world.
Recently, the magnitude 6.7 earthquake hit Turkey's western coast and was felt
in the resort towns of Bodrum and Datça in Muğla province. A good knowledge on
the site effects of the original site in Bodrum is of primarily importance from
the engineering point of view. In this study, one-dimensional ground response
analyses for a specific site in Bodrum city was performed with using a
nonlinear and equivalent linear site response approaches. In order to estimate
the ground response of the original site, DEEPSOIL software which is a
one-dimensional site response analysis program was used. In addition, the
results of the two different approaches were compared. Results of the two
original sites under two different earthquake motions are given in terms of
peak ground accelerations (PGA) and spectral accelerations. These site effects
should be considered when specifying ground shaking levels for seismic designs
to prevent earthquake damage.

Keywords

equivalent linear analysis, Site response, nonlinear analysis, Deepsoil, earthquake

References

• Day, R. 2012. Geotechnical Earthquake Engineering Handbook. McGraw-Hill Companies, Inc.
• Hashash, Y.M.A., Dashti, S., Romero, M.I., Ghayoomi, M. & Musgrove M. 2015. Evaluation of 1-D seismic site response modeling of sand using centrifuge experiments. Soil Dynamics and Earthquake Engineering, 78, 19–31.
• Hashash, Y.M.A., Phillipes, C. & 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, 1-21.
• Edincliler, A. & Calikoglu M. 2016. Comparison of Site Response of Unimproved and Improved Soils Using DEEPSOIL. Twelfth International Congress on Advances in Civil Engineering. ACE 2016. Bogazici University, Istanbul, Turkey.
• 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.
• Marto, A., Soon, T. C., Kasim, F. & Suhatril M. 2013. A Correlation of Shear Wave Velocity and Standard Penetration Resistance. EJGE, 18,463-471
• Seed, H.B., Tokimatsu, K., Harder, L.F. & Chung R. 1985. Influence of SPT procedures in soil liquefaction resistance evaluations. Journal of Geotechnical Engineering, 111(12), 1425–1445.
• Seed, H. B., & Idriss I. M. 1971. Simplified Procedure for Evaluating Soil Liquefaction Potential. Journal of the Soil Mechanics and Foundations Division, ASCE, 97(9), 1249–1273.