The current default IM calculations are: PGA, PGV, CAV, AI, Ds575, Ds595, MMI, pSA
The default periods pSA is calculated at are: 0.02, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 0.75, 1.0, 2.0, 3.0, 4.0, 5.0, 7.5, 10.0
This can be extended into a logspace from 0.01 to 10 at 100 steps in base 10
An intermediate range of periods is to be determined for use in Seistech for UHS / empirical calculations
| Intensity Measure | Status | Notes |
|---|---|---|
| PGA/PGV/MMI | ||
| pSA | Cython - works well | |
| CAV | ||
| AI | ||
| Ds | Very Slow / unvectorised | |
| Advanced IMs | Current implemented models: SAC_Steel_MF_9Story, SAC_Steel_MF_3Story, Steel_MF_5Story To be implemented models: | |
| Taghavi and Miranda | Viktor is translating, James to verify/test | |
| Fourier Spectra | Robin in doing preliminary work at the moment | |
| Directionality (via SA RotD100/RotD50) | https://uceqeng.slack.com/files/U0C0T55F0/FR5BF7VAP/burks_validationofgmsimsusingsimpleproxies_bssa_2014.pdf | |
| Ratio of elastic spectra to inelastic spectra | Same paper as above | |
| period-to-period SA correlations | Future work (how do we validate with empirical) |