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| Titel |
Evaluation and considerations about fundamental periods of damaged reinforced concrete buildings |
| VerfasserIn |
R. Ditommaso, M. Vona, M. R. Gallipoli, M. Mucciarelli |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 13, no. 7 ; Nr. 13, no. 7 (2013-07-31), S.1903-1912 |
| Datensatznummer |
250018562
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| Publikation (Nr.) |
 copernicus.org/nhess-13-1903-2013.pdf |
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| Zusammenfassung |
| The aim of this paper is an empirical estimation of the fundamental period
of reinforced concrete buildings and its variation due to structural and
non-structural damage. The 2009 L'Aquila earthquake has highlighted the
mismatch between experimental data and code provisions value not only for
undamaged buildings but also for the damaged ones. The 6 April 2009
L'Aquila earthquake provided the first opportunity in Italy to estimate the
fundamental period of reinforced concrete (RC) buildings after a strong
seismic sequence. A total of 68 buildings with different characteristics, such as age,
height and damage level, have been investigated by performing ambient
vibration measurements that provided their fundamental translational
period. Four different damage levels were considered according with the
definitions by EMS 98 (European Macroseismic Scale), trying to regroup the
estimated fundamental periods versus building heights according to damage.
The fundamental period of RC buildings estimated for low damage level is
equal to the previous relationship obtained in Italy and Europe for undamaged
buildings, well below code provisions. When damage levels are higher, the
fundamental periods increase, but again with values much lower than those
provided by codes. Finally, the authors suggest a possible update of the
code formula for the simplified estimation of the fundamental period of
vibration for existing RC buildings, taking into account also the inelastic
behaviour. |
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