Numerical analysis on effect of nonlinear joints on propagation of stress wave

被引：0
作者：
State Key Laboratory of Geotechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan [1 ]
Hubei
430071, China
不详 [2 ]
Hubei
430070, China
机构：
[1] State Key Laboratory of Geotechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, Hubei
[2] Hubei Key Laboratory of Roadway Bridge and Structure Engineering, Wuhan University of Technology, Wuhan, 430070, Hubei
来源：
Yanshilixue Yu Gongcheng Xuebao | / 5卷 / 953-959期
关键词：
DEM; Joint; Nonlinear; Numerical simulation; Stress wave;
D O I：
10.13722/j.cnki.jrme.2014.0262
中图分类号：
学科分类号：
摘要：
Firstly, in order to validate the DEM software UDEC in simulating the wave propagation across a rock mass with two sets of nonlinear joints, two examples were computed with a nonlinear joint model embedded in UDEC. The results agreed well with the existing theories. Secondly, the influence of the angle and space of joints on the propagation of stress wave across two sets of intersecting joints was studied. It was found that the attenuation of stress wave across two sets of intersecting joints was greater than that across the parallel joints under the same angle and joint space. Transmission coefficient reduced with increasing the angle. The space of the intersecting and parallel joints had the similar influence on the transmission coefficient. Finally, a parametric study was conducted to investigate the effects of the angle α between the joints and the stress wave, the angle β between the two sets of joints, the space for each set of joints and the width of joint area L. The analytical results showed that the influences of α and β were different with the ranges changing. The similarities existed between the influence of space of intersecting joints and parallel joints. With the increasing of L, the attenuation decreased significantly firstly and then slowed down. Hyperbolic function was employed to fit the result and the fitting result had good agreement. ©, 2015, Academia Sinica. All right reserved.
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页码：953 / 959
页数：6
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