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首页> 外文会议>International UDEC/3DEC Symposium on Numerical Modeling of Discrete Materials in Geotechnical Engineering, Civil Engineering, and Earth Sciences >UDEC modeling of constant normal stiffness direct shear tests
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UDEC modeling of constant normal stiffness direct shear tests

机译：恒定正常刚度直接剪切试验UDEC建模

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Direct shear tests have not been widely used to test rock masses, yet they may be a better representation of the conditions a rock mass is subjected to in the field and may also provide data on the behavior of rock masses under load that may not be obtained using other methods. However, the process of fabricating shear testing equipment and rock mass samples is both expensive and difficult. It may be more expedient to model direct shear tests using numerical techniques. The model would need to be developed and verified against experimental data. However, once this is done, it could be used to investigate failure mechanisms and to carry out parametric studies on rock masses at relatively minimal expense and time. Laboratory direct shear tests have been carried out under constant normal stiffness (CNS) conditions on relatively large-scale, jointed, soft rock masses at Monash University. The behavior of the samples during the tests, both physically and visually, has been recorded. Three typical pre-peak and failure mechanisms were observed during testing. The direct shear tests have been modeled using the two-dimensional distinct element code, UDEC, to investigate if the numerical model can replicate these same mechanisms. FISH routines have been incorporated into the UDEC model to measure stresses and deformations and to apply CNS conditions. A movie of rock mass behavior during the test has also been generated. This paper describes the UDEC model and compares the behavior of the laboratory rock mass samples with the UDEC simulations.
机译：直接剪切测试没有被广泛用于测试岩体，但它们可能是岩体在该领域进行岩石质量的情况更好地表示，并且还可以提供关于可能无法获得的负载下岩体行为的数据使用其他方法。然而，制造剪切测试设备和岩石质量样品的过程既昂贵又困难。使用数值技术模拟直接剪切测试可能更有利。需要对实验数据进行开发和验证该模型。然而，一旦完成，它可以用来调查失败机制并以相对少的费用和时间对岩体进行参数研究。在蒙纳士​​大学的恒定正常刚度（CNS）条件下，在恒定正常刚度（CNS）条件下进行了实验室直接剪切试验。已经记录了在物理和视觉上的测试期间样品的行为。在测试期间观察到三种典型的预峰值和失效机制。已经使用二维独特元素码UDEC进行建模直接剪切测试，以研究数值模型是否可以复制这些相同的机制。 FISH惯例已被纳入UDEC模型以测量应力和变形并应用CNS条件。还生成了一部岩石质量行为的电影。本文介绍了UDEC模型，并比较了实验室岩体样本与UDEC模拟的行为。

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