Seismic Performance Evaluation of Novel Cold-Formed Steel Framed Shear Walls Sheathed with Corrugated Steel Sheets Page: 47
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0.9 1 1.06 1.13 1.17 1.24 1.29 1.37
1 1 1.07 1.13 1.18 1.26 1.31 1.39
1.1 1 1.07 1.14 1.19 1.27 1.32 1.41
1.2 1 1.07 1.15 1.2 1.28 1.34 1.44
1.3 1 1.08 1.16 1.21 1.29 1.36 1.46
1.4 1 1.08 1.16 1.22 1.31 1.38 1.49
>1.5 1 1.08 1.17 1.23 1.32 1.4 1.51
Many sources of uncertainty contribute to variability in collapse capacity. It is important
to evaluate all significant sources of uncertainty in collapse response, and to incorporate their
effects in the collapse assessment process.
Four sources of uncertainty were considered in the performance evaluation process, there
were record-to-record uncertainty (RTR), design requirements uncertainty (DR), test data
uncertainty (TD), and modeling uncertainty (MDL).
6.1.1 Record-to-Record Uncertainty (RTR)
Record-to-record uncertainty, /JRTR, is due to variability in the response of index
archetypes to different ground motion records. Record-to-record variability is evident in
incremental dynamic response plots. Variability in response is due to the combined effects of: (1)
variations in frequency content and dynamic characteristics of the various records; and (2)
variability in the hazard characterization as reflected in the Far-Field ground motion record set.
The record-to-record uncertainty is calculated by:
/JRTR = 0.1 + 0.1-1T < 0.40
Where /3RTR must be greater than or equal to 0.20.
In the 2-story office building in the long direction, the /JRTR is calculated as
flRTR = 0.1 + 0.1 x 1.82 = 0.282
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Lan, Xing. Seismic Performance Evaluation of Novel Cold-Formed Steel Framed Shear Walls Sheathed with Corrugated Steel Sheets, thesis, August 2017; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc1011859/m1/55/: accessed May 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; .