Evaluation of CyberShake ground motions for engineering practice

Ganyu Teng, & Jack W. Baker

Published August 13, 2018, SCEC Contribution #8449, 2018 SCEC Annual Meeting Poster #006

This poster presents the results from evaluation of CyberShake ground motions for high-rise building design in the Los Angeles region. The feasibility of CyberShake is studied by comparing simulated ground motions against recordings from past earthquakes as well as empirical models. This study considers two sites with different underlying soil conditions in the Los Angeles region, and selects comparable suites of ground motion records from CyberShake and NGA-West2 according to the ASCE 7-16 requirements. In particular, intensity measures, shaking duration, directional polarization and consistency of the selected ground motions’ properties with hazard deaggregation are analyzed. This poster highlights major evaluation results: 1) Selected ground motions from CyberShake and NGA-West2 share similar features; 2) During CyberShake ground motion selection, it is easy to choose records with specific sources to match the hazard deaggregation; 3) CyberShake durations on soil match well with empirical models, whereas those on rock are consistently shorter; 4) Some ground motions generated by San Andreas fault ruptures produce excessive polarization, but they can be usually excluded after the ground motion selection process. This study serves as a preliminary evaluation of CyberShake and results suggest that CyberShake ground motions are suitable for engineering practice.

Citation
Teng, G., & Baker, J. W. (2018, 08). Evaluation of CyberShake ground motions for engineering practice. Poster Presentation at 2018 SCEC Annual Meeting.

Related Projects & Working Groups
Earthquake Engineering Implementation Interface (EEII)