Investigating the spatial correlations in univariate random fields of peak ground velocity and peak ground displacement considering anisotropy
Abstrak
AbstractThe results of seismic risk assessment of spatially distributed infrastructure systems are significantly influenced by spatial correlation of earthquake intensity measures (IM). The assumption of isotropy is a basis for most of the existing correlation models of earthquake IMs. In this study, the isotropy assumption of intra-event residuals of peak ground velocity (PGV) and peak ground displacement (PGD) is investigated by implementing a nonparametric statistical test. Using recorded IMs of 9 earthquakes, it is concluded that there is not sufficient evidence to support the assumption of isotropy in general, and the set of intra-event residuals ofPGVandPGDshould be considered as the realization of anisotropic random fields. Investigations show that the anisotropy properties of intra-event residuals ofPGVandPGDare related to anisotropy properties of local soil characteristics indicated by average shear wave velocity of soil profile from the 30 m depth to the surface (Vs30). Finally, predictive models are proposed based on obtained results in order to simulate the correlated univariate random fields ofPGVandPGDconsidering anisotropy.
Penulis (3)
Morteza Abbasnejadfard
Morteza Bastami
Afshin Fallah
Akses Cepat
- Tahun Terbit
- 2021
- Bahasa
- en
- Total Sitasi
- 11×
- Sumber Database
- CrossRef
- DOI
- 10.1186/s40677-021-00196-w
- Akses
- Open Access ✓