Modelling nonlinear site coefficients and predominant periods for southern coasts of Istanbul by geotechnical downhole arrays

FERCAN N. Ö., Ansal A.

Soil Dynamics and Earthquake Engineering, vol.200, 2026 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 200
  • Publication Date: 2026
  • Doi Number: 10.1016/j.soildyn.2025.109851
  • Journal Name: Soil Dynamics and Earthquake Engineering
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, Environment Index, Geobase, INSPEC
  • Keywords: 1D site response, Downhole array, Equivalent-linear analysis, Monte-Carlo simulation, PGA scaling, Predominant period, Response spectral amplification factor
  • Istanbul Kültür University Affiliated: Yes

Abstract

This study investigates nonlinear response spectral amplification factors (RSAF) and predominant periods (Tp) for the southern coast of the Istanbul's European Side by employing a Monte Carlo simulation-based approach. The methodology incorporates one dimensional (1D) site response analyses of simulated random shear wave velocity (Vs) profiles, along with the optimization of these profiles through least-squares error between the response spectra of recorded weak ground motions and the modelled ones. The recorded ground motions were selected from a database of near-field earthquakes with epicentral distances Repi < 100 km and magnitudes in the range 3.9