Dear Kirk,

R-CRISIS was not developed based on a specific code or guideline, it is a software to compute seismic hazard both deterministic and probabilistic methodology. My purpose is not to describe in detail the techniques to compute seismic hazard; for that purpose, an excellent and updated summary can be found in Manuela Villani's Ph.D. Thesis (Villani, 2010).

In relation to requirements of the PEER TBI Guidelines 2017 (Chapter 3), maybe these comments are helpful:

1. R-CRISIS is capable to carry out Logic Tree calculations. You have to specify the logic tree branches and their respective weights.

2. We have added a wide range of attenuation models, about 55. Those models are added as they are published in the respective papers. In R-CRISIS documentation you can find all attenuation models references. It should be pointed out that we try to keep the attenuation models as updated as we can, hence, the number of models will continue increasing.

3. R-CRISIS is not capable to provide you fractiles of ground motion for certain hazard level. Attenuation models are expressed in terms of their median and standard deviation, hence, it is not possible to obtain fractiles requested PEER TBI Guidelines (i.e. 5%, 16%, 50%, 84%, 95%, equivalent to median plus or minus one and two standard deviations).

4. You are able to include site effects to your seismic hazard model. R-CRISIS allows you to include site effects through several ways, one of the most used is by means of Vs30 grid files, but you can take them into account by amplification factors grid as well. On the other hand, some attenuation models include amplification factors, for example, Vs30, Z1.0, soil classification, among others. It is important to clarify that those amplification factors are not implemented by us, they are own of each attenuation model and remember that models are included to R-CRISIS as they are published. For more information about this topic, you can look up this subject in the R-CRISIS Help Menu.

5. R-CRISIS is capable to compute disaggregation analysis for different return periods, structural periods and epsilon values. In addition, you can obtain disaggregation results for different scenarios through batch disaggregation tool. This topic is explained in detail in the Help Menu.

6. R-CRISIS can provide you seismic hazard results for both deterministic and probabilistic methodologies.

7. R-CRISIS does not neither perform near-fault sites adjustments nor account rupture directivity effects. They have to be performed by the analyst who is developing the model.

8. R-CRISIS is not enabled to calculate ground motion records. They have to be assessed by the analyst externally.

I hope these comments are helpful to you.

Do not hesitate to contact us if you require support at any else topic.

Thank you for your interest in R-CRISIS.

Reference of Villani (2010):

Villani, M. (2010). High resolution SHA in the vicinity of earthquake sources. Istituto Universitario di Studi Superiori, Engineering Seismology. ROSE School. Doctor Degree.

Best regards,