Annual Meeting - SCEC.org

Group 1 – SHRA | Poster Abstracts
response. We consider pseudo-spectral acceleration (PSA), peak ground displacement (PGD), and
peak ground velocity (PGV) as measures of long-period ground motions to predict the response of
tall, steel moment-resisting frames (MRFs). The building responses of interest are: simulated
collapse; total structural loss; and peak inter-story drift ratio, given that the building is not a total
structural loss. We study steel MRFs of 6- or 20-stories, with either a stiffer, higher strength design
or a more flexible, lower strength design. The welded moment-resisting connections have either
sound or brittle welds. We perform a non-linear time history analysis of finite element models of
each building in 75,000 simulated ground motions. A combination of PGD and PGV best predict
collapse of steel MRFs. Depending on the building design, PSA or a combination of PGD and PGV
best predict whether the building is a total structural loss. PSA alone best predicts the peak interstory
drift ratio, assuming the building is not a total structural loss.
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