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| Titel |
Parametric studies and quantitative assessment of the vulnerability of a RC frame building exposed to differential settlements |
| VerfasserIn |
C. Negulescu, E. Foerster |
| 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 ; 10, no. 9 ; Nr. 10, no. 9 (2010-09-01), S.1781-1792 |
| Datensatznummer |
250008391
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| Publikation (Nr.) |
 copernicus.org/nhess-10-1781-2010.pdf |
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| Zusammenfassung |
| The aim of this paper is to propose a simplified methodology to evaluate the
mechanical performances of buildings exposed to landslide hazard, by using
procedures inspired from the seismic risk analysis, such as the Capacity
Spectrum Method (ATC 40, 1996). Landslide hazard involves so many aspects,
that quantitative vulnerability assessment requires to consider one basic
scenario at a time, i.e. one typology for the landslide hazard and one for
the structural element considered. In this paper, we propose to assess
vulnerability for simple one bay-one storey reinforced concrete (RC) frame
structures subjected to differential settlements, using 2-D parametric
nonlinear static time-history analyses. After a short review of methods used
in practice to estimate building deformations induced by ground movements
(e.g. differential settlements), we present the parametric studies carried
out to identify the most relevant parameters, in order to predict the
structural damage, as well as the methodology to develop analytical fragility
curves, that can be used to quantitatively evaluate the structural
vulnerability in landslide risk analyses. Different types of parameters that
could influence structural behaviour have been examined in this analysis:
foundation type (i.e. different combinations of links), cross-section
geometry, section reinforcement degree, displacement magnitudes and
displacement inclination angles. We show that the magnitude and inclination
angle of displacements can be used as two relevant parameters for this type
of landslide scenario. Based on these results, some simulations are conducted
using the software SeismoStruct (SeismoSoft, 2003), and the proposed
structural damage levels consider the local strain limits of steel and
concrete constitutive materials. Some preliminary fragility curves are
proposed with respect to the magnitude of differential ground displacement.
It can be seen that the curves corresponding to limit states LS2 (moderate
damage) and LS4 (complete damage) in the present study, correspond
respectively to the "tolerable settlements" "observed intolerable
settlements" curves proposed by Zhang and Ng (2005). |
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