Rock joints with unequal close-open behavior have significant influences on stress wave propagation across them. A stress wave of sufficiently large amplitude does not only mobilize the nonlinear deformation of joints, but also force the joints to close and open. In the present study, the Bandis-Barton model and the Coulomb-slip model are adopted to describe the normal and tangential behavior, respectively, of the closed joints. However, when the joints are open, both sides of the joints behave as two free surfaces. The improved time-domain recursive method is employed to derive wave propagation equations for three cases, i.e. the joint is closed but does not slide, the joint is closed and slides, and the joint is open. Then, the normal and tangential relative displacements of joints, as well as the energy attenuation coefficient, are calculated. A comparison of transmitted waves based on different methods is conducted to verify the validity of the present approach. Eventually, parametrical studies show that the higher in-situ stress causes the smaller energy attenuation coefficient, and the wave energy attenuation is also dependent on the frequency and amplitude of the incident wave, the incident angle, the joint spacing and the joint number.

具有不等闭开行为的岩石节理对穿过它们的应力波传播有显着影响。幅度足够大的应力波不仅调动关节的非线性变形，而且迫使关节关闭和打开。在本研究中，分别采用 Bandis-Barton 模型和 Coulomb-slip 模型来描述闭合节点的法向和切向行为。但是，当关节打开时，关节的两侧都表现为两个自由曲面。采用改进的时域递推法推导出关节闭合但不滑动、关节闭合滑动、关节打开三种情况的波传播方程。然后，计算关节的法向和切向相对位移，以及能量衰减系数。对基于不同方法的传输波进行了比较，以验证本方法的有效性。最终，参数研究表明，地应力越高，能量衰减系数越小，波能衰减还取决于入射波的频率和幅度、入射角、接头间距和接头数量。