Abstract
To determine the shear wave velocity structure and predominant period features of Tınaztepe in İzmir, Turkey, where new building sites have been planned, active–passive surface wave methods and single-station microtremor measurements are used, as well as surface acquisition techniques, including the multichannel analysis of surface waves (MASW), refraction microtremor (ReMi), and the spatial autocorrelation method (SPAC), to pinpoint shallow and deep shear wave velocity. For engineering bedrock (V s > 760 m/s) conditions at a depth of 30 m, an average seismic shear wave velocity in the upper 30 m of soil (AVs30) is not only accepted as an important parameter for defining ground behavior during earthquakes, but a primary parameter in the geotechnical analysis for areas to be classified by V s30 according to the National Earthquake Hazards Reduction Program (NEHRP). It is also determined that Z1.0, which represents a depth to V s = 1000 m/s, is used for ground motion prediction and changed from 0 to 54 m. The sediment–engineering bedrock structure for Tınaztepe that was obtained shows engineering bedrock no deeper than 30 m. When compared, the depth of engineering bedrock and dominant period map and geology are generally compatible.
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Acknowledgement
This work was performed within part of Mr. Eren Pamuk’s master thesis at Dokuz Eylul University, The Graduate School of Natural and Applied Sciences. The borilling report and the MASW measurement (near the borehole) in this research were provided by TUBITAK-KAMAG (Project No. 106G159). GMT (Wessel and Smith, 1995) was used to create Figure 2. The authors also thank the anonymous reviewers for their helpful comments.
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Pamuk, E., Özdağ, Ö.C., Özyalın, Ş. et al. Soil characterization of Tınaztepe region (İzmir/Turkey) using surface wave methods and nakamura (HVSR) technique. Earthq. Eng. Eng. Vib. 16, 447–458 (2017). https://doi.org/10.1007/s11803-017-0392-y
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DOI: https://doi.org/10.1007/s11803-017-0392-y