Numerical Evaluation of Local Site Effects on Amplification of the 2017 Mw 7.3 Sarpol-e-Zahab, Iran, Earthquake Waves Using Near and Far-Field Records

摘要

This is the first study to quantitatively evaluate the local site effects in the most severely affected neighborhoods of Sarpol-e-Zahab city following the devastating earthquake of November 12, 2017, in Kermanshah province (Iran). The site's two-dimensional numerical simulation and its nonlinear dynamic analysis were conducted using Abaqus finite element software. The study's findings include determining the dynamic predominant period and the maximum amplification factor of the site. The results showed that under applying the near-field record, 2 to 3-storey buildings in Fooladi neighborhood and 1 to 4-storey buildings in Shahid Shiroodi Mehr housing neighborhood experience the resonance phenomenon. Moreover, the average shear wave velocity (Vs)(30) was calculated. The project site was classified into the III class in the Iranian code of practice for the seismic-resistant design of buildings (IRSt2800). Finally, the acceleration response spectra obtained from the numerical study were compared with the standard design spectra of IRSt2800 and the International Building code of practice 2015 (IBC 2015). The reported results of this paper can provide a useful and new database of local site effects for seismic designers and specialists to reconstruct existing buildings and future structures adequately.