Continuous Monitoring of High‐Rise Buildings Using Seismic Interferometry

Research Article| September 26, 2017 Continuous Monitoring of High‐Rise Buildings Using Seismic Interferometry Aurélien Mordret; Aurélien Mordret aDepartment of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139‐4307, mordret@mit.edutoksoz@mit.edu Search for other works by this author on: GSW Google Scholar Hao Sun; Hao Sun bDepartment of Civil and Environmental Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139‐4307, haosun@mit.eduobuyuk@mit.edu Search for other works by this author on: GSW Google Scholar German A. Prieto; German A. Prieto cDepartamento de Geociencias, Universidad Nacional de Colombia ‐ Sede Bogotá, Cra 30 # 45‐03, Bogotá, Colombia, gaprietogo@unal.edu.co Search for other works by this author on: GSW Google Scholar M. Nafi Toksöz; M. Nafi Toksöz aDepartment of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139‐4307, mordret@mit.edutoksoz@mit.edu Search for other works by this author on: GSW Google Scholar Oral Büyüköztürk Oral Büyüköztürk bDepartment of Civil and Environmental Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139‐4307, haosun@mit.eduobuyuk@mit.edu Search for other works by this author on: GSW Google Scholar Bulletin of the Seismological Society of America (2017) 107 (6): 2759–2773. https://doi.org/10.1785/0120160282 Article history first online: 27 Sep 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Aurélien Mordret, Hao Sun, German A. Prieto, M. Nafi Toksöz, Oral Büyüköztürk; Continuous Monitoring of High‐Rise Buildings Using Seismic Interferometry. Bulletin of the Seismological Society of America 2017;; 107 (6): 2759–2773. doi: https://doi.org/10.1785/0120160282 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract The linear seismic response of a building is commonly extracted from ambient vibration measurements. Seismic deconvolution interferometry performed on ambient vibrations can be used to estimate the dynamic characteristics of a building, such as its shear‐wave velocity and its damping. The continuous nature of the ambient vibrations allows us to measure these parameters repeatedly and to observe their temporal variations. We used 2 weeks of ambient vibrations, recorded by 36 accelerometers that were installed in the Green Building at the Massachusetts Institute of Technology campus, to monitor the shear wavespeed and the apparent attenuation factor of the building. Because of the low strain of the ambient vibrations, we observed small speed changes followed by recoveries. We showed that measuring the velocity variations for the deconvolution functions, filtered around the fundamental‐mode frequency, is equivalent to measuring the wandering of the fundamental frequency in the raw ambient vibration data. By comparing these results with local weather parameters, we showed that the air humidity is the dominating factor in the velocity variations of the waves in the Green Building, as well as the main force behind the wandering of the fundamental mode. The one‐day periodic variations are affected by both the temperature and the humidity. The apparent attenuation, measured as the exponential decay of the fundamental‐mode waveforms, is strongly biased due to the amplitude of the raw vibrations and shows a more complex behavior with respect to the weather measurements. We have also detected normal‐mode nonlinear interaction for the Green Building, likely due to heterogeneity or anisotropy of its structure. We found that the temporal behavior of the frequency singlets may be used for monitoring. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.