A comparative study on Soil Properties and Applications Review with EERA and NERA in İstanbul-MARMARAY Project Between Kazlıçeşme to Sirkeci

Over the course of history Marmara region in North-western Turkey has been the site of numerous destructive earthquakes. 76 km-long MARMARAY Project is an important project not only for Turkey but also for the world because it joins the two continents through railway. In this paper, using average wave velocities in layers, thickness, density and formation data based on the PS logs, 43 m and 65.5 m depths ranging from 7 different boring logs in a ground-wise different geological regions in Istanbul, ground response functions were obtained. Based on the soil profiles transferred to EERA and NERA softwares, the rock soil record of August 17, 1999 Kocaeli earthquake in İstanbul – Beşiktaş Ministry of Public Works and Settlement (IBMPWS), response and design spectrums that may be considered crucial in case of an earthquake were obtained. The acceleration record was used as an input motion having PGA value of 0,04287 g (east-west component) which was applied on sublayers (i.e. sand, gravel, clay) using EERA and NERA programs. Also nonlinear analysis was compared with the linear method of analysis. Stages involved in ground response analyses to develop site-speci?c response spectra at a soil site are summarized.