岩质边坡在发生破坏时往往同时存在张拉破坏和剪切破坏。在考虑拉破坏的同时，结合双强度非等比例相关联折减法和强度折减的最短路径理论，改进了传统的双强度折减法，避免了以往双强度折减时选择比例系数的盲目性，所得的边坡稳定性系数更符合最小值理论。综合以上方法提出考虑拉破坏的离散元双强度折减法，并利用离散元软件udec对一顺层岩质边坡进行模拟。结果表明，该方法能够较好地反映边坡破坏过程中粘聚力与内摩擦角的发挥程度，所得稳定性系数与M－P法所得结果更为接近，并且小于不考虑拉破坏时所得值。%The failure mode of rock slope is often composed of both tension and shear failure .Tensile failure is considered .Additionally , the method of double reduction factors is improved combined with the double strength and non-proportional associated reduction method and the theory of minimum strength degradation path .It avoids the blindness of ratio selection in the process of reduction and the stability coefficient of slope is more in line with the minimum theory .The double strength reduction method considering tensile failure which is used to simulate a dip bedding rock slope is proposed based on the above methods .The practical results show that proposed method per-fectly reflected the different decay rates of friction angle and cohesion .The stability coefficient is much closer with the result of M-P method, and it is less than the result obtained by the method that tensile failure is not considered .
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