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首页> 外文会议>International Conference on Cyclic Behaviour of Soils and Liquefaction Phenomena; 20040331-20040402; Bochum; DE >Centrifuge modelling of liquefaction of saturated sand under cyclic loading
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Centrifuge modelling of liquefaction of saturated sand under cyclic loading

机译：循环荷载作用下饱和砂液化的离心模型

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摘要

Dynamic centrifuge tests were performed on models of saturated deposits of liquefiable sand with relative densities ranging from 50% to 80%. Similar earthquake simulations were applied to the models in order to compare their behaviour during cyclic loading. It was observed that even though the sand relative density controls the rate of pore pressure generation and deformation potential, massive excess pore pressure generation causing subsequent degradation of the sand's mechanical properties and large settlements were observed in all the models. It was also observed that the sand's relative density strongly influences the attenuation or amplification of accelerations through the deposit. Based on the experimental results, some practical considerations on the use of densification as a measure against earthquake-induced liquefaction are presented.
机译：在相对密度为50％至80％的可液化沙子饱和沉积物模型上进行了动态离心测试。为了比较模型在循环荷载作用下的行为，对模型应用了类似的地震模拟。观察到，即使砂子的相对密度控制了孔隙压力的产生和变形势的速率，在所有模型中都观察到大量过剩的孔隙压力的产生导致了沙子的机械性能的下降和大的沉降。还观察到，沙子的相对密度极大地影响穿过沉积物的加速度的衰减或放大。根据实验结果，提出了一些关于使用致密化措施来防止地震引起的液化的实际考虑。

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