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首页> 外文期刊>E3S Web of Conferences >Centrifuge tests to evaluate the effect of depth of water table on seismic response of shallow foundations on silty sands
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Centrifuge tests to evaluate the effect of depth of water table on seismic response of shallow foundations on silty sands

机译：离心机测试，以评估水位景深对粉煤浅层浅层抗震响应的影响

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A set of dynamic centrifuge experiments were performed to assess the effect of the depth of the groundwater table on the seismic site response of silty sand. Silty sand was prepared in a laminar container. The testing program consists of experiments on dry as well as saturated soils and a test, which the groundwater table was below the soil surface. The specimens were spun in a centrifuge, then they were excited with a suite of seismic motions. Results show that 1) while the for peak ground acceleration amplification factor of the saturated soil was smaller than those for the dry soil, the Arias intensity amplification factor of the saturated soil was larger than those for dry soil. 2) as the depth of the groundwater table increased, peak ground amplification factor and short-period amplification factors increased, the mid-period amplification factors decreased. 3) the depth of the groundwater table influences the frequency content of the free field motion. 4) the unsaturated soil behaved stiffer than dry and saturated soils.
机译：进行一组动态离心机实验，以评估地下水位深度对粉煤的地震部位应答的影响。在层状容器中制备粉状砂。测试程序包括干燥和饱和土壤的实验和地下水位下方的测试。试样在离心机中旋转，然后用一套地震运动激发它们。结果表明，1）虽然饱和土壤的峰接口扩增因子小于干燥土壤的饱和土，但饱和土的arias强度扩增系数大于干燥土壤的饱和土。 2）随着地下水台的深度增加，峰值地面放大因子和短周期放大因子增加，中期放大因子降低。 3）地下水位的深度影响自由场运动的频率内容。 4）不饱和土的表现比干燥和饱和的土壤更硬。

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