SAND LIQUEFACTION DUE TO IRREGULAR EXCITATION
SAND LIQUEFACTION DUE TO IRREGULAR EXCITATION
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不规则激励引起的砂液化
DOI：
10.3208/sandf1972.12.4_65
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发表时间：
1972
影响因子：
3.7
通讯作者：
S. Yasuda
中科院分区：
文献类型：
--
作者：
K. Ishihara;S. Yasuda
在传统的三轴剪切试验装置中加入了电液伺服加载系统，从而可以对土样施加任何所需的加载模式。在将该系统应用于饱和砂土液化的研究中，即使在由于液化的开始而使试件的刚性显著下降之后，仍然很难保持所施加的应力得到完全控制。事实证明，在加载滑块中使用弹性接头非常有用，可以克服这一缺陷。使用1964年新泻地震时获得的加速度记录作为输入载荷模式，应用于饱和新泻砂样。调查揭示了沙子在受到不规则激发时的几个令人感兴趣的特征。
An electro hydraulic servo type loading system was incorporated into the conventional triaxial shear test apparatus so that any desired form of load pattern can be applied to soil specimens. In applying this system to the study of liquefaction of saturated sands, a difficulty was encountered in keeping the applied stress perfectly controlled even after the rigidity of the sample falls considerably due to the onset of liquefaction. The use of an elastic joint in the loading ram proved very useful to overcome this defect. The acceleration records obtained at the time of the Niigata earthquake of 1964 were used as input load patterns to be applied to saturated specimens of a Niigata sand. The investigation disclosed several features of interest concerning the behaviors of the sand when subjected to irregular exitation.