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| Titel |
Investigation of post-earthquake displacements in viaducts using Geodetic and Finite Element Methods |
| VerfasserIn |
D. Güney, M. Acar, M. T. Özlüdemir, R. N. Celik |
| 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. 12 ; Nr. 10, no. 12 (2010-12-15), S.2579-2587 |
| Datensatznummer |
250008537
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| Publikation (Nr.) |
 copernicus.org/nhess-10-2579-2010.pdf |
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| Zusammenfassung |
| This paper presents the results of research into the post-earthquake
displacements of the partially constructed road viaducts in Bolu, Turkey
after the Izmit/Kocaeli, (Mw = 7.4), and Düzce (Mw =
7.1) earthquakes on 17 August and 12 November 1999, respectively. The
investigations on the viaducts were carried out using both Geodetic and
Finite Element Methods (FEM). Firstly, all the geodetic network stations
selected for the project were checked because of the recent deformation in
the area. Then, new control stations were placed between the piers of the
viaducts. 28 object points were placed and measured on each pier to determine
their displacements. In the second stage, the behaviours of the viaducts were
modelled using the FEM, and the Düzce earthquake acceleration record was
analysed to observe the response of the viaducts in a time history domain.
The modelled displacement response of the viaducts was compared with the
geodetic measurements in order to interpret the sensitivity of the design
calculation of the engineering model. The pier displacements that were
geodetically measured and calculated using FEM peak pier displacements showed
an increase in the piers located closer to the surface rupture from the
Izmit/Kocaeli and Düzce earthquakes. The agreement between the observed
and modelled displacements decreases with the increase in the distance from
the fault line. Since, near the fault trace the horizontal displacement field
is discontinuous and large inelastic deformation is expected, the behaviour
of the part of the structure located near the fault line cannot be easily
reproduced by FEM simulations. This is because the applied model loads
derived from the source acceleration spectra cannot be included in the
localized finite deformation effects. In order to obtain an improved
engineering analysis, it is necessary to utilise more parameters in the
numerical analysis. |
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