Influence of different spatial coherency models in soil-structure interaction analyses of large semi-rigid structures

Soyluk K., Zouatine M., Sadegh-Azar H., Zentner I., Kudawoo D., Khemakhem A.

Bulletin of Earthquake Engineering, 2026 (SCI-Expanded, Scopus)

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1007/s10518-026-02664-w
  • Dergi Adı: Bulletin of Earthquake Engineering
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, Geobase, INSPEC, Academic Search Ultimate (EBSCO), Natural Science Collection (ProQuest), Earth, Atmospheric, & Aquatic Science Collection (ProQuest), Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest)
  • Anahtar Kelimeler: Coherency model, Nuclear power plant reactor building, Soil-structure interaction, Spatial variability, Spectral corrections
  • Gazi Üniversitesi Adresli: Evet

Özet

This study aims to validate the spectral corrections given in ASCE Standard 4–98 as well as the coherency model developed by Abrahamson (2005) by comparing them with different coherency models widely used in the earthquake engineering field. Having implemented these coherency functions in the open-source software code_aster, in the first part of the study a rigid square foundation is analysed under spatially varying ground motion including the wave incoherency. Foundation response spectra are then determined for rock and soil site profiles using the compatible free-field response spectra. Based on the free-field response spectra and foundation response spectra, reduction factors are determined and compared with the spectral corrections given in EPRI (2005) and ASCE Standard 4–98. The analyses results reveal that the foundation response spectra can be very sensitive to the selected ground motion parameters of the assumed coherency models. In the second part of the paper, the effect of the spatial variability of ground motion on the reactor building of a nuclear power plant (NPP), including the soil-structure interaction (SSI), is investigated. The findings show that the effect of the incoherency is remarkable in the secondary systems which are sensitive to frequencies larger than 10 Hz.