An exploration of incorporating site response into PSHA—Part I: Issues related to site response analysis methods

An exploration of incorporating site response into PSHA-part II: Sensitivity of hazard estimates to site response approaches

“…Differences are generally more pronounced at shorter periods, although relatively large variability arises in the intermediate period range as well, mostly between the equivalent linear and nonlinear analyses. As expected, the variability is higher in the large spectral acceleration range since at this range greater differences in the ground response estimates were observed [6].…”

“…The convergence problem was mostly encountered for the relatively strong records, as discussed in Papaspiliou et al [6]. This is observed in the panels of The predominant elastic period of vibration for the examined stratigraphy (based on the average shear-wave velocity) is 0.76s, which during intense shaking increases to longer periods, depending on the induced strains.…”

“…However, the variability associated with the soil properties is of secondary importance compared to that associated with the ground-motion records [4] and hence, in this study, only the latter is considered. In our companion paper [6] we performed a number of site response analyses using 120 ground-motion records and examined the sensitivity of the ground response estimation to different methods and parameter selections. Herein, we initially examine the impact of such choices on the median amplification function and its standard deviation.…”

“…Moreover, it is noted that the study has used 120 ground-motion records for validation purposes, while the methodology can be applied using a much smaller number [4]. Details regarding the selected ground-motion records and the soil stratigraphies of the investigated sites can be found in Papaspiliou et al [6]. …”

“…The paper initially investigates the sensitivity of the median amplification function and its standard deviation to different site response analysis choices. Site response analysis has been performed using both equivalent linear and nonlinear methodologies, different dynamic soil properties curves and different model calibration parameters [6]. Subsequently, the site amplification functions are used to transform the Abrahamson and Silva [7] rock GMPE and the sensitivity of the PSHA results is explored.…”