Akademik Veri Yönetim Sistemi
10th Turkish Conference on Earthquake Engineering, 10TCEE 2025, İstanbul, Türkiye, 8 - 10 Ekim 2025, cilt.843 LNCE, ss.346-362, (Tam Metin Bildiri)
The simplified empirical approaches used for liquefaction risk assessment provide approximate and fast evaluations. However, the assessment criteria of this method restrict the occurrence of liquefaction for specific depths and shear wave velocities (Vs) as adopted by Turkish Earthquake Building Code (TEBC) [1]. Also, the liquefaction potential method in empirical approach is quantified by risk classes (i.e., Low to Very High) that are quite open to comment. This study investigates liquefaction potential by comparing simplified empirical and advanced numerical methods incorporating 1D wave propagation theory by nonlinear soil models of six distinct locations from the south coasts of Metropolitan Istanbul. In this context, the location based probabilistic spectral accelerations, and 12 set of design spectrum matched ground motion records were used respectively for empirical approach implemented in TEBC [1] and for nonlinear site response analyzes. The superiorities of numerical methods were indicated by this comparison. Besides, the performance of Earthquake Level 2 (i.e., EL2, 10% probability of exceedance in 475 years return period, is defined as the “Design Earthquake” according to building importance factor) design spectrum of TEBC in which the site effects are considered based on time averaged shear wave velocity of the top 30 m, Vs30, is tested for liquefaction prone soils of Istanbul, revealing the exceedance of design spectrum at mid-to-long period (i.e., T > 1.0 s) range.