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Centrifuge modeling of a dry sandy slope response to earthquake loading

机译：干燥砂质边坡对地震载荷响应的离心模型

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摘要

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.
机译：本文介绍了在50g离心加速度下地震和循环波激发的干燥，砂质边坡的一系列离心模型的结果，以研究边坡的动力性能。经调整的El Centro地震以各种峰值加速度激励的具有不同剖面的四个模型斜坡的测试结果揭示了该斜坡的响应放大机制。通过计算记录的加速时间历史的响应谱，可以观察到输入事件的不同频率内容被放大到不同程度。模型斜率在恒定频率和振幅的循环波下显示出完全不同的响应，因为光谱放大因子曲线没有明显的峰值。这些发现表明，以真实的地震动激发的动态离心测试比循环载荷测试能够更好地反映斜坡的响应特性。

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