Accessing CyberShake Duration Data
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This page details how to access CyberShake duration data.
Duration data is a relatively new addition to the CyberShake codebase, starting with Study 15.12.
Types of duration data
In CyberShake, we calculate the following duration metrics:
- Energy integral (integral of the velocity squared)
- Time to go from 5-75%, 5-95%, and 20-80% of maximum velocity
- Arias intensity (pi/2g times the integral of the acceleration squared)
- Time to go from 5-75%, 5-95%, and 20-80% of maximum acceleration
- Cumulative absolute velocity (CAV) (integral of the absolute value of the acceleration).
A reference document for these formulas is available here: File:DurationMetrics.docx
Accessing database data
The database contains duration data for the most useful metrics.