Constitutive law for the shear strength of rock joints based on three-dimensional surface parameters
Constitutive law for the shear strength of rock joints based on three-dimensional surface parameters
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DOI：
10.1016/s1365-1609(02)00101-6
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发表时间：
2003-01-01
影响因子：
7.2
通讯作者：
Egger, P
中科院分区：
文献类型：
--
作者：
Grasselli, G;Egger, P
提出了一种新的本构准则，该准则将应力和位移相关联，用于模拟在恒定法向荷载条件下节理的抗剪性能。它基于对表面的经验描述，以及对七种岩石类型的拉伸节理复制品和诱导拉伸裂缝进行的50多次恒定法向荷载直剪试验的结果。这种本构模型能够描述在实验室进行的试验性剪切试验。此外，模型所需的参数可以通过标准的实验室试验轻松测量。所提出的准则还被用于估算节理粗糙度系数（JRC）值。预测值与通过剪切试验反分析得到的JRC值成功相关。（C）2002爱思唯尔科学有限公司。保留所有权利。
A new constitutive criterion, relating stress and displacements, is proposed to model the shear resistance of joints under constant normal load conditions. It is based on an empirical description of the surface, and on the results from more than 50 constant-normal-load direct-shear tests performed on replicas of tensile joints and on induced tensile fractures for seven rock types. This constitutive model is able to describe experimental shear tests conducted in the laboratory. Moreover, the parameters required in the model can be easily measured through standard laboratory tests. The proposed criterion was also used to estimate the joint roughness coefficient (JRC) value. The predicting values were successfully correlated with JRC values obtained by back analysis of shear tests. (C) 2002 Elsevier Science Ltd. All rights reserved.