Conveners: Sanaz Rezaeian, Jon Stewart, Nicolas Luco, Christine Goulet, Gregory Deierlein, and Farzin Zareian  
Dates: August 24, 2018 (10:00 - 16:30)
Location: SCEC Boardroom, USC, Los Angeles
SCEC Award and Report: 18161

SUMMARY: Ground motion simulation validation-related research has maximum impact when goals are clearly articulated and connected to practical need. Most impact is achieved when results (a) provide guidance on what methods are suitable for use “now” and (b) inform ground motion modelers how to improve their methods. The SCEC Ground Motion Simulation Validation (GMSV) Technical Activity Group (TAG) is a collaboration between ground motion modelers and engineering users, focused on developing, testing and rating methodologies for simulated ground motions to be used in engineering applications. The GMSV TAG will convene a 1-day workshop, bringing together experts from the ground motion prediction and earthquake engineering communities, with the purpose of clearly defining and steering the SCEC GMSV program in the most impactful directions. The goal is to identify short- and long-term research goals for SCEC GMSV-related projects based on SCEC CyberShake simulations.

A key outcome of this effort will be action items addressing:

• GMSV related to ground motion characterization (including GMPEs): (1) Establish a process (similar to Dreger et al, 2015 for the SCEC Broadband Platform) to assess the suitability of Cybershake simulations for predicting PSA and duration in terms of mean values and trends with major controlling source, path, and site parameters. (2) Based on assessment results, work directly with simulation model developers to improve models. (3) Critically evaluate and improve, as needed, stochastic elements of the simulation procedures to produce appropriate scaling and dispersion of high-frequency ground motions.
• GMSV related to building response: Develop a white paper to describe how to use simulated motions for building response studies once a target response spectrum (e.g. UHS or CMS) is developed by some other process. The paper will include best practices, as we now understand them, and identify limitations to the methodology.

REFERENCES

• Bijelić N, Lin T, Deierlein GG. Validation of the SCEC Broadband Platform simulations for tall building risk assessments considering spectral shape and duration of the ground motion. Earthquake Engng Struct Dyn. 2018;47:2233–2251. https://doi.org/10.1002/eqe.3066
• Brendon A. Bradley, Didier Pettinga, Jack W. Baker, and Jeff Fraser (2017) Guidance on the Utilization of Earthquake-Induced Ground Motion Simulations in Engineering Practice. Earthquake Spectra: August 2017, Vol. 33, No. 3, pp. 809-835. https://doi.org/10.1193/120216EQS219EP
• Douglas S. Dreger, Gregory C. Beroza, Steven M. Day, Christine A. Goulet, Thomas H. Jordan, Paul A. Spudich, Jonathan P. Stewart; Validation of the SCEC Broadband Platform V14.3 Simulation Methods Using Pseudospectral Acceleration Data. Seismological Research Letters ; 86 (1): 39–47. doi: https://doi.org/10.1785/0220140118
• Christine A. Goulet, Norman A. Abrahamson, Paul G. Somerville, Katie E. Wooddell; The SCEC Broadband Platform Validation Exercise: Methodology for Code Validation in the Context of Seismic‐Hazard Analyses. Seismological Research Letters ; 86 (1): 17–26. doi: https://doi.org/10.1785/0220140104

FRIDAY, AUGUST 24, 2018

PARTICIPANTS

*Remote Participants