Seismic Performance Evaluation of Novel Cold-Formed Steel Framed Shear Walls Sheathed with Corrugated Steel Sheets Page: 48
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6.1.2 Design Requirements Uncertainty (DR)
Design requirements uncertainty, /3DR, is related to the completeness and robustness of the
design requirements, and the extent to which they provide safeguards against unanticipated failure
modes. Design requirements-related uncertainty is quantified in terms of the quality of design
requirements, rated in accordance with the requirements in Table 3-1 of FEMA P695.
6.1.3 Test Data Uncertainty (TD)
Test data uncertainty, /JTD, is related to the completeness and robustness of the test data
used to define the system. Uncertainty in test data is closely associated with, but distinct from,
modeling-related uncertainty. Test data-related uncertainty is quantified in terms of the quality of
test data, rated in accordance with the requirements in Table 3-2 of FEMA P695.
6.1.4 Modeling Uncertainty (MDL)
Modeling uncertainty, /JMDL, is related to how well index archetype models represent the
full range of structural response characteristics and associated design parameters of the archetype
design space, and how well the analysis models capture structural collapse behavior through direct
simulation or non-simulated component checks. Modeling-related uncertainty is quantified in
terms of the quality of index archetype models, rated in accordance with the requirements in Table
5-3 of FEMA P695. Table 4-4 concluded the quality rating of the design requirements uncertainty,
test data uncertainty, and modeling uncertainty. The rating of design requirements uncertainty, test
data uncertainty and modeling uncertainty is summarized in Table 6.2.
Table 6.2 - Uncertainty Rating of /JDR, /JTD, and JMDL.
Superior Good Fair Poor
flDR 0.1 0.2 0.35 0.5
/TD 0.1 0.2 0.35 0.5
/JMDL 0.1 0.2 0.35 0.5
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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/m1/56/: accessed May 19, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; .