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Evaluation of the pseudostatic analyses of earth dams using Fe simulation and observed earthquake-induced deformations: case studies of Upper San Fernando and Kitayama dams.

Akhlaghi T, Nikkar A - ScientificWorldJournal (2014)

Bottom Line: Dynamic analyses were conducted to simulate the earthquake-induced deformations of the dams using the computer program Plaxis code.Then the pseudostatic seismic coefficient used in the design and analyses of the dams were compared with the seismic coefficients obtained from dynamic analyses of the simulated model as well as the other available proposed pseudostatic correlations.Based on the comparisons made, the accuracy and reliability of the pseudostatic seismic coefficients are evaluated and discussed.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Civil Engineering, University of Tabriz, Tabriz 5166116471, Iran.

ABSTRACT
Evaluation of the accuracy of the pseudostatic approach is governed by the accuracy with which the simple pseudostatic inertial forces represent the complex dynamic inertial forces that actually exist in an earthquake. In this study, the Upper San Fernando and Kitayama earth dams, which have been designed using the pseudostatic approach and damaged during the 1971 San Fernando and 1995 Kobe earthquakes, were investigated and analyzed. The finite element models of the dams were prepared based on the detailed available data and results of in situ and laboratory material tests. Dynamic analyses were conducted to simulate the earthquake-induced deformations of the dams using the computer program Plaxis code. Then the pseudostatic seismic coefficient used in the design and analyses of the dams were compared with the seismic coefficients obtained from dynamic analyses of the simulated model as well as the other available proposed pseudostatic correlations. Based on the comparisons made, the accuracy and reliability of the pseudostatic seismic coefficients are evaluated and discussed.

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Related in: MedlinePlus

Cross section and layers of Upper San Fernando dam.
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Related In: Results  -  Collection


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fig1: Cross section and layers of Upper San Fernando dam.

Mentions: As shown in Figure 1, the dam is divided into 9 different layers, each representing a different soil material zone. These soil units of dam section have been classified using (1) suggested by Sawada and Takahashi [9]. The equation indicates the effect of height variation on the shear wave velocity and shear modulus of the layers materials located at different levels of the dam section. Consider(1)VS=140Z0.34,where VS is the shear wave velocity and Z is the dam height below the crest.


Evaluation of the pseudostatic analyses of earth dams using Fe simulation and observed earthquake-induced deformations: case studies of Upper San Fernando and Kitayama dams.

Akhlaghi T, Nikkar A - ScientificWorldJournal (2014)

Cross section and layers of Upper San Fernando dam.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3927942&req=5

fig1: Cross section and layers of Upper San Fernando dam.
Mentions: As shown in Figure 1, the dam is divided into 9 different layers, each representing a different soil material zone. These soil units of dam section have been classified using (1) suggested by Sawada and Takahashi [9]. The equation indicates the effect of height variation on the shear wave velocity and shear modulus of the layers materials located at different levels of the dam section. Consider(1)VS=140Z0.34,where VS is the shear wave velocity and Z is the dam height below the crest.

Bottom Line: Dynamic analyses were conducted to simulate the earthquake-induced deformations of the dams using the computer program Plaxis code.Then the pseudostatic seismic coefficient used in the design and analyses of the dams were compared with the seismic coefficients obtained from dynamic analyses of the simulated model as well as the other available proposed pseudostatic correlations.Based on the comparisons made, the accuracy and reliability of the pseudostatic seismic coefficients are evaluated and discussed.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Civil Engineering, University of Tabriz, Tabriz 5166116471, Iran.

ABSTRACT
Evaluation of the accuracy of the pseudostatic approach is governed by the accuracy with which the simple pseudostatic inertial forces represent the complex dynamic inertial forces that actually exist in an earthquake. In this study, the Upper San Fernando and Kitayama earth dams, which have been designed using the pseudostatic approach and damaged during the 1971 San Fernando and 1995 Kobe earthquakes, were investigated and analyzed. The finite element models of the dams were prepared based on the detailed available data and results of in situ and laboratory material tests. Dynamic analyses were conducted to simulate the earthquake-induced deformations of the dams using the computer program Plaxis code. Then the pseudostatic seismic coefficient used in the design and analyses of the dams were compared with the seismic coefficients obtained from dynamic analyses of the simulated model as well as the other available proposed pseudostatic correlations. Based on the comparisons made, the accuracy and reliability of the pseudostatic seismic coefficients are evaluated and discussed.

Show MeSH
Related in: MedlinePlus