Amplitude dependence of equivalent modal parameters in monitored buildings during earthquake swarms

Summary This paper investigates the dynamic response of three sample buildings belonging to the Seismic Observatory for Structures, the Italian network for the permanent seismic monitoring of strategic structures, managed by the Italian Department of Civil Protection. The case studies cover differen...

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Published in:Earthquake engineering & structural dynamics 2017-11, Vol.46 (14), p.2399-2417
Main Authors: Ceravolo, Rosario, Matta, Emiliano, Quattrone, Antonino, Zanotti Fragonara, Luca
Format: Article
Language:English
Subjects:
Aseismic buildings
Buildings
Case studies
Cultural heritage
Cultural resources
Dynamic response
Earthquake construction
earthquake swarm
Earthquakes
Equivalence
Finite element method
Historical buildings
Masonry
Mathematical models
Parameters
Protection
Seismic activity
seismic monitoring
Seismic response
Shaking
Soil
Soil investigations
Soil-structure interaction
Structures
system identification
wandering of natural frequencies
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Summary:Summary This paper investigates the dynamic response of three sample buildings belonging to the Seismic Observatory for Structures, the Italian network for the permanent seismic monitoring of strategic structures, managed by the Italian Department of Civil Protection. The case studies cover different building types that could loosely represent the Italian building stock, with a special emphasis on cultural heritage and masonry structures. Observed under a low‐intensity seismic swarm comprising about 30 aftershocks after a main event, the three buildings are analysed through an input–output, model‐driven linear dynamic identification procedure, depicting the relation between the shaking level at the site and the variation of the equivalent structural modal parameters, while keeping into account the effects of soil–structure interaction. Finite element models will be used to investigate one of the case studies and to compare the law of variation of the structural modal parameters with respect to simplified models proposed by technical standards. Copyright © 2017 John Wiley & Sons, Ltd.
ISSN:0098-8847
1096-9845
DOI:10.1002/eqe.2910