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

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Abstract

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.

Suggested Citation

Celebi, M., Toksoz, N., Buyukozturk, O., 2011, Revelations from ambient shaking data of a recently instrumented unique building at MIT campus, in IOMAC 2011. Proceedings, 8 p.

Study Area

Publication type Conference Paper
Publication Subtype Conference Paper
Title Revelations from ambient shaking data of a recently instrumented unique building at MIT campus
Year Published 2011
Language English
Publisher IOMAC
Contributing office(s) Earthquake Science Center
Description 8 p.
Larger Work Type Book
Larger Work Subtype Conference publication
Larger Work Title IOMAC 2011. Proceedings
Country United States
State Massachusetts
City Cambridge
Other Geospatial MIT campus
Additional publication details