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Detecting failure events in buildings: a numerical and experimental analysis

Heckman, V. M. and Kohler, M. D. and Heaton, T. H. (2010) Detecting failure events in buildings: a numerical and experimental analysis. In: 9th U.S. National & 10th Canadian Conference on Earthquake Engineering (9USN/10CCEE): Reaching Beyond Borders, Proceedings. Earthquake Engineering Research Institute .

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A numerical method is used to investigate an approach for detecting the brittle fracture of welds associated with beam -column connections in instrumented buildings in real time through the use of time-reversed Green’s functions and wave propagation reciprocity. The approach makes use of a prerecorded catalog of Green’s functions for an instrumented building to detect failure events in the building during a later seismic event by screening continuous data for the presence of waveform similarities to one of the prerecorded events. This study addresses whether a set of Green’s functions in response to an impulsive force load can be used to approximate the response of the structure to a localized failure event such as a brittle weld fracture. Specifically, we investigate whether prerecorded Green’s functions can be used to determine the absolute time and location of a localized failure event in a building. We also seek to differentiate between sources such as a weld fracture that are structurally damaging and sources such as falling or colliding furniture and other non-structural elements that do not contribute to structural failure. This is explored numerically by comparing the dynamic response of a finite-element cantilevered beam model structure to a variety of loading mechanisms. A finite-element method is employed to determine the behavior of the resulting elastic waves and to obtain a general understanding of the structural response.

Item Type:Book Section
Heaton, T. H.0000-0003-3363-2197
Additional Information:We would like to thank donors to the Hartley Fellowship for their support.
Funding AgencyGrant Number
Fred L. Hartley Family FoundationUNSPECIFIED
Record Number:CaltechAUTHORS:20160209-163237718
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:64358
Deposited By: Monica Kohler
Deposited On:17 Feb 2016 19:38
Last Modified:03 Oct 2019 09:37

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