Response study of a 51-story-tall Los Angeles, California building inferred from motions of the Mw7.1 July 5, 2019 Ridgecrest, California earthquake
Links
- More information: Publisher Index Page (via DOI)
- Download citation as: RIS | Dublin Core
Abstract
A 51-story building in downtown Los Angeles that is equipped with a seismic monitoring accelerometric array recorded the Mw7.1 Ridgecrest, California earthquake of July 5, 2019. The building is a dual-core reinforced-concrete shear-wall and perimeter-column structure with ~ 80% of floors constructed as post-tensioned flat slabs, which makes it a trending design. Using system identification methods, spectral analyses, and coherence-phase angle computations, the recorded response data allowed the identification of dynamic response characteristics (fundamental frequencies of [NS] 0.21 Hz, [EW] 0.28 Hz, and [Torsional] 0.45 Hz, critical damping percentages < 2.5%, and associated mode shapes), as well as computation of drift ratios with maximum peaks of 0.145% for both NS and EW directions. The critical damping percentages are consistent with those recommended by LATBSDC (2017). There is no indication from the records that post-tensioned slab design played any role in altering the dynamic characteristics.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Response study of a 51-story-tall Los Angeles, California building inferred from motions of the Mw7.1 July 5, 2019 Ridgecrest, California earthquake |
| Series title | Bulletin of Earthquake Engineering |
| DOI | 10.1007/s10518-021-01053-9 |
| Volume | 19 |
| Publication Date | February 19, 2021 |
| Year Published | 2021 |
| Language | English |
| Publisher | Springer |
| Contributing office(s) | Earthquake Science Center |
| Description | 18 p. |
| First page | 1797 |
| Last page | 1814 |
| Country | United States |
| State | California |
| City | Los Angeles |