A method for seismic stability analysis of jointed rock slopes using Barton-Bandis failure criterion
A method for seismic stability analysis of jointed rock slopes using Barton-Bandis failure criterion
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DOI：
10.1016/j.ijrmms.2020.104487
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发表时间：
2020-12
影响因子：
7.2
通讯作者：
Lian-heng Zhao;Chenghao Yu;Xiao Cheng;Shi Zuo;Kang-fu Jiao
中科院分区：
文献类型：
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作者：
Lian-heng Zhao;Chenghao Yu;Xiao Cheng;Shi Zuo;Kang-fu Jiao
地震是地震活动区边坡破坏的主要原因。本文提出了一种分析两块体平面节理岩质边坡地震稳定性的方法。在分析中，Barton-Bandis破坏准则，考虑到岩石节理的非线性特性。基于极限平衡原理，推导了节理岩质边坡在修正拟动力作用下的安全系数。此外，在这项研究中开发的分析方法解释了两个块之间的相互作用力。因此，它可以有效地分析节理岩质边坡的稳定性，并区分破坏模式。此外，进行了参数研究，以调查的几何和材料属性的安全系数的假设边坡的影响。结果表明，边坡的几何形状以及结构面粗糙度系数JRC、水平地震加速度系数kh、结构面抗压强度JCS和结构面基本摩擦角B等参数对边坡稳定性有显著影响。推导的准确性用通用离散元程序UDEC6.0进行了验证.采用参数敏感性分析确定影响边坡稳定性的关键参数。最后，编制了一套抗震稳定性设计图表，供初步设计使用。
Earthquakes are the main cause of slope failure in seismic active regions. In this study, we present a method for analyzing the seismic stability of a plane jointed rock slope with two blocks. In this analysis, the Barton-Bandis failure criterion is applied, considering the nonlinear characteristics of rock joints. Based on the limit equilibrium principle, we derived the safety factor of a jointed rock slope subjected to the modified pseudo-dynamic seismic forces. In addition, the analytical method developed in this study explains the interaction force between two blocks. Hence, it can effectively analyze the stability of a jointed rock slope and distinguish the failure modes. Further, a parametric study was conducted to investigate the effects of geometric and material properties on the safety factor of a hypothetical slope. The results show that the slope stability is significantly influenced by the geometry of the slope and the parameters including the joint roughness coefficientJRC, the horizontal seismic acceleration coefficientkh, the joint compressive strengthJCS, and the basic friction angle of the structural planeϕb. Moreover, the accuracy of the derivation is verified by the universal distinct element codeUDEC 6.0. A parametric sensitivity analysis is used to determine the key parameters affecting slope stability. Finally, a set of seismic stability design charts is produced for preliminary design.