Measurements of elastic properties of geomaterials in laboratory compression tests
Measurements of elastic properties of geomaterials in laboratory compression tests
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实验室压缩试验中土工材料弹性性能的测量
DOI：
10.1520/gtj10076j
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发表时间：
1994
影响因子：
1.6
通讯作者：
Y. Kohata
中科院分区：
文献类型：
--
作者：
F. Tatsuoka;T. Sato;Choonsik Park;Youseong Kim;J. Mukabi;Y. Kohata
描述了两种类型的轴向加载装置，分别具有高和低轴向加载能力，用于实验室对岩土材料（即天然土壤和岩石以及处理过的土壤）进行位移控制压缩试验。它们的设计使加载方向可以在使用齿轮系统时在高度恒定的轴向应变率下逆转而没有任何明显的时间滞后。介绍了具有代表性的砂、沉积软岩和粘土的三轴及平面应变压缩试验结果。这些结果是通过非常缓慢的单调（或单向）加载试验获得的，通过多次卸载/重新加载循环，连续测量沿试件侧面局部轴向应变，应变范围从0.0001%（10−6）到失效时的应变范围。结果表明，在初始加载期间，应变小于0.001%（10−5）的初始刚度与加载开始后立即施加的小卸载/重新加载周期的刚度相同。初始变形特性是相当线性和弹性的。
Two types of axial loading devices having high and low capacities of axial load, respectively, for use in displacement-controlled compression tests on geomaterials (i.e., natural soils and rocks, and treated soils) in the laboratory are described. They were designed so that the loading direction can be reversed without any noticeable time lag under a highly constant axial strain rate while using a gear system. Results of representative triaxial and plane strain compression tests on a sand, a sedimentary soft rock, and a clay are presented. These results were obtained from very slow monotonic (or one-way) loading tests with several unload/reload cycles measuring axial strains locally along the lateral surfaces of a specimen continuously for a strain range from the order of 0.0001% (10−6) to that at failure. It is demonstrated that initial stiffness at strains less than about 0.001% (10−5) during primary loading is the same as stiffness during small unload/reload cycles applied immediately after the start of loading. Initial deformation properties are rather linear and elastic.
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
Toyota;H.
通讯作者：
H.