为研究恒阻大变形(NPR)锚索在地震作用下的吸能特性和动力响应规律，总结地震作用 下无支护边坡发生破坏的一般规律，利用振动台开展地震条件下无支护边坡以及 NPR 锚索支护边 坡的振动台对比试验。 结果表明:相同工况下经过 NPR 锚索支护后的边坡变形破坏情况以及岩土 体的破碎程度与无支护边坡相比改善显著，NPR 锚索支护边坡的最终破坏程度也远低于无支护边 坡，表明 NPR 锚索在地震作用下具有良好的吸能特性，能够通过吸收地震释放能量的方式增强边 坡的整体性，降低坡体破坏程度，为边坡提供有效支护;分析 NPR 锚索在试验全程的轴力变化情 况，发现在地震惯性力的反复作用下，锚索内恒阻结构产生疲劳效应导致轴力下降，随着施加振动 荷载强度不断提高，轴力下降到一定数值后便不再发生明显变化，可认为在地震作用下 NPR 锚索 的锚固特性始终存在，仍能对边坡提供有效支护;分析同一工况下 NPR 锚索支护边坡与无支护边 坡各测点 PGA 放大系数的变化趋势，发现 NPR 锚索用于边坡支护工程中时，可以很好的限制坡体 变形，对于滑坡位移具有一定的控制能力;根据试验现象及动力响应分析，将地震作用下无支护边 坡破坏过程分为 3 个阶段:张拉裂缝产生及坡顶松动阶段，裂缝持续发展阶段，滑动面贯通坡体崩 塌溃坏阶段。

In order to study the energy absorption characteristics and dynamic response law of constant resistance large deformation (NPR) anchor cable under earthquake， and summarize the general law of unsupported slope failure under earthquake， the shaking table comparison test of unsupported slope and NPR anchor cable supported slope un⁃ der earthquake is carried out by using shaking table. Under the same working conditions， the improvement in deforma⁃ tion and damage of slopes supported by the NPR anchor cables and the fragmentation of rock⁃soil mass are obvious， compared with unsupported slopes. And the final damage degree of the NPR anchor cable supported slope is also much lower than that of the unsupported slope. It indicates that the NPR anchor rope has a good energy absorption property under the action of the earthquake， which can strengthen the integrity of the slope by absorbing the energy re⁃ leased by the earthquake， so as to reduce the degree of damage to the slope and provide effective support for the slope. By analyzing the axial force change of the NPR anchor cable in the whole test process， it is found that under the re⁃ peated actions of seismic inertia force， the axial force declines due to the fatigue effect of the constant⁃resistance struc⁃ ture within the anchor cables. With a continuous increase in the intensity of the vibration load applied， the axial force has no obvious change after decreasing to a certain value. It can be considered that the anchorage characteristics of the NPR anchor cable always exist under the action of earthquake， and it can still provide an effective support for the slope. After analyzing the variation trends of PGA amplification factors of each measuring point on slopes sup⁃ ported by the NPR anchor cables and on unsupported slopes under the same working conditions， it is found that when used in slope⁃supporting projects， the NPR anchor cables can effectively restrict slope deformation. Based on the ex⁃ perimental phenomena and dynamic response analysis， the decaying process of unsupported slopes under earthquake actions is divided into three stages: tension crack generation and slope top loosening stage， crack continuous develop⁃ ment stage， and sliding surface through slope collapse stage.