Centrifuge modeling of a dry sandy slope response to earthquake loading |
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Authors: | Yuzhen Yu Lijun Deng Xun Sun He Lu |
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Institution: | (1) State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing, 100084, China |
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Abstract: | This paper presents results of a series of centrifuge models of dry, sandy slopes excited by earthquakes and cyclic waves
under 50g centrifugal acceleration to investigate the dynamic performance of slopes. Test results of four model slopes with different
profiles stimulated by the adjusted El Centro earthquakes with various peak accelerations reveal the response amplification
mechanism of the slope. By calculating the response spectra of recorded acceleration time histories, it was observed that
the different frequency contents of the input event were amplified to different degrees. The model slope showed a completely
different response under the cyclic wave with a constant frequency and amplitude in that the spectral amplification factor
curves had no prominent peak values. These findings suggest that dynamic centrifuge tests excited with a real ground motion
are able to better reflect the response characteristics of a slope rather than the tests with cyclic loading. |
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Keywords: | Centrifuge modeling Dynamic response Earthquake Shaking Stable Slope |
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