Non-parametric analysis of a single seismometric recording to obtain building dynamic parameters
Main Article Content
Abstract
We propose a simple time-domain, non-parametric method to estimate the damping at the fundamental frequency
of a building. The method aims at obtaining quick-and-dirty data on large sets of buildings, at the expenses
of the accuracy provided by other, more complex and resource-demanding techniques. The analysis of a 10 min
recording of ambient vibration with a single high-resolution seismometer atop the building can provide a good
estimate of the required parameters for the first flexural modes on orthogonal components. The proposed
methodology does not require complex filtering and assumptions on signal structure, nor multiple measurement
points or clear single transients induced by shakers, shocks or release tests. We checked the stability of the proposed
method in terms of duration and characteristics of the signal, and compared the results obtained by others
with standard techniques. Then, we tested the ability of the proposed technique to identify damping and frequency
variations due to large displacements, damage or changes in the structural characteristics. The proposed
methodology provides a satisfactory agreement when compared with other techniques. Even if it is not always
possible to obtain higher modes, the advantage is that it is possible to study with limited resources the fundamental
parameters for a large number of buildings. This is useful to include experimental data on building behaviour
in microzonation studies.
of a building. The method aims at obtaining quick-and-dirty data on large sets of buildings, at the expenses
of the accuracy provided by other, more complex and resource-demanding techniques. The analysis of a 10 min
recording of ambient vibration with a single high-resolution seismometer atop the building can provide a good
estimate of the required parameters for the first flexural modes on orthogonal components. The proposed
methodology does not require complex filtering and assumptions on signal structure, nor multiple measurement
points or clear single transients induced by shakers, shocks or release tests. We checked the stability of the proposed
method in terms of duration and characteristics of the signal, and compared the results obtained by others
with standard techniques. Then, we tested the ability of the proposed technique to identify damping and frequency
variations due to large displacements, damage or changes in the structural characteristics. The proposed
methodology provides a satisfactory agreement when compared with other techniques. Even if it is not always
possible to obtain higher modes, the advantage is that it is possible to study with limited resources the fundamental
parameters for a large number of buildings. This is useful to include experimental data on building behaviour
in microzonation studies.
Article Details
How to Cite
Mucciarelli, M. and Gallipoli, M. R. (2007) “Non-parametric analysis of a single seismometric recording to obtain building dynamic parameters”, Annals of Geophysics, 50(2). doi: 10.4401/ag-3079.
Issue
Section
OLD
Open-Access License
No Permission Required
Istituto Nazionale di Geofisica e Vulcanologia applies the Creative Commons Attribution License (CCAL) to all works we publish.
Under the CCAL, authors retain ownership of the copyright for their article, but authors allow anyone to download, reuse, reprint, modify, distribute, so long as the original authors and source are cited. No permission is required from the authors or the publishers.
In most cases, appropriate attribution can be provided by simply citing the original article.
If the item you plan to reuse is not part of a published article (e.g., a featured issue image), then please indicate the originator of the work, and the volume, issue, and date of the journal in which the item appeared. For any reuse or redistribution of a work, you must also make clear the license terms under which the work was published.
This broad license was developed to facilitate open access to, and free use of, original works of all types. Applying this standard license to your own work will ensure your right to make your work freely and openly available. For queries about the license, please contact ann.geophys@ingv.it.