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Revelations from ambient shaking data of a recently instrumented unique building at MIT campus

December 31, 2011

A state-of-the-art seismic monitoring system comprising 36 accelerometers and a data-logger with real-time capability was recently installed at Building 54 on the campus of the Massachusetts Institute of Technology [MIT], Cambridge, Massachusetts. The system is designed to record translational, torsional and rocking motions, and to facilitate computation of drift between select pairs of stories. The cast-in-place, reinforced concrete building is rectangular in plan but has vertical irregularities. Heavy equipment is installed asymmetrically on the roof. Spectral analyses and system identification performed on one set of low-amplitude ambient data reveal distinct fundamental translational frequencies in the structural NS and EW directions [0.75 and 0.67Hz, respectively], a torsional frequency of 1.49 Hz, a rocking frequency of 0.75 Hz, and very low damping. Such results from low-amplitude data serve as baseline against which to compare the behavior and performance of the building during stronger shaking caused by future earthquakes in the region.

Citation Information

Publication Year 2011
Title Revelations from ambient shaking data of a recently instrumented unique building at MIT campus
Authors Mehmet Çelebi, N. Toksoz, O. Buyukozturk
Publication Type Conference Paper
Publication Subtype Conference Paper
Index ID 70041665
Record Source USGS Publications Warehouse
USGS Organization Earthquake Science Center

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