Response of an Asymmetrical Five-Story Building in Fairbanks, Alaska During the 30 November 2018 M7.1 Anchorage, Alaska Earthquake
Session: Seismic Hazard Analysis for Critical Infrastructure [Poster]
Type: Poster
Date: 4/19/2021
Presentation Time: 03:45 PM Pacific
Description:
A recently constructed, five-story, asymmetrical steel building on the campus of the University of Alaska, Fairbanks was equipped with a strong-motion array that recorded the M 7.1 Anchorage earthquake of November 30, 2018 at an epicentral distance of 408 km. The largest recorded peak accelerations at the basement and top of the building are 0.021g and 0.071g, respectively. The steel building is designed with several bays that utilize K-shaped buckling restrained braces. The building response records allow identification of fundamental periods (frequencies) as 0.73s (1.4 Hz), 0.63s (1.60 Hz), and 0.56s (1.78 Hz) in the NS, EW, and torsional directions, respectively. System identification computations resulted in estimated critical damping percentages as 7.7% and 4.7 % in the NS and EW directions, respectively. At this low-level of shaking, the building is not expected to (and did not) experience observable damage, which is confirmed with very small average drift ratios. This is the first time a seismic response from this structural array has been analyzed.
Presenting Author: Mehmet Celebi
Student Presenter: No
Authors
Mehmet Celebi Presenting Author Corresponding Author celebi@usgs.gov U.S. Geological Survey |
Natalia Ruppert naruppert@alaska.edu University of Alaska Fairbanks |
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Response of an Asymmetrical Five-Story Building in Fairbanks, Alaska During the 30 November 2018 M7.1 Anchorage, Alaska Earthquake
Category
General Session