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System Identification of UCSD-NHERI Shake-Table Test of Two-Story Structure with Cross-Laminated Timber Rocking Walls
| 题名： | System Identification of UCSD-NHERI Shake-Table Test of Two-Story Structure with Cross-Laminated Timber Rocking Walls |
| 正文语种： | eng |
| 作者： | Mugabo, Ignace;Barbosa, Andre R.;Sinha, Arijit;Higgins, Christopher;Riggio, Mariapaola;Pei, Shiling;van de Lindt, John W.;Berman, Jeffrey W. |
| 作者单位： | Oregon State Univ Sch Civil & Construct Engn Corvallis OR 97331 USA|KPH Consulting Engineers 111 SW 5th Ave Suite 2600 Portland OR 97204 USA;Oregon State Univ Sch Civil & Construct Engn Corvallis OR 97331 USA;Oregon State Univ Dept Wood Sci & Engn Corvallis OR 97331 USA;Oregon State Univ Sch Civil & Construct Engn Corvallis OR 97331 USA;Oregon State Univ Dept Wood Sci & Engn Corvallis OR 97331 USA;Colorado Sch Mines Dept Civil & Environm Engn Golden CO 80401 USA;Colorado State Univ Dept Civil & Environm Engn Ft Collins CO 80523 USA;Univ Washington Dept Civil & Environm Engn Seattle WA 98195 USA |
| 摘要： | A full-scale 2-story mass timber building was tested on the University of California San Diego Natural Hazards Engineering Research Infrastructure (UCSD-NHERI) uniaxial shake table during the period from June 2017 to September 2017. The main objective of the experimental program was to test the performance of mass timber building designs with different seismic lateral force-resisting systems. The focus of this study is on a building configuration designed using self-centering post-tensioned cross-laminated timber (CLT) rocking walls with U-shaped steel flexural plate energy dissipators. The shake-table tests were designed to subject the building to a series of earthquake ground motions of increasing intensity, ranging from a service-level earthquake to 1.20 times the maximum considered earthquake intensity. Between each ground motion, low-amplitude white-noise excitations were applied to the building, which responded as a quasilinear system. In this paper, two output-only operational modal analysis methods are used to estimate the modal parameters (frequency, damping, and mode shapes) based on acceleration data collected during the white-noise shake-table tests. The correlations of observed damage and repairs performed during the experimental program with changes in estimated modal features are reported. The modal parameters estimated from the testing program are also compared with a linear finite-element model that is used to validate the modal identification results and study the performance of the two system identification methods for CLT rocking structures. (C) 2021 American Society of Civil Engineers. |
| 出版年： | 2021 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 147 |
| 期： | 4 |
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