Abstract：Numerical models were used to study the influence of the rock mass structure and lithology on the seismic response characteristics of steep rock slopes for homogeneous soft/hard rock slopes and layered soft/hard rock slopes. The dynamic analyses used the finite element method. The predictions gave the dynamic acceleration amplification coefficient (MPGA) of the slopes that characterized the influence of the rock structure and lithology on the wave propagation characteristics and the amplification effect. The results show that the rock structure and the lithology influence the wave propagation characteristics in the slopes with weak interlayer interactions leading to local amplification of the seismic waves in the slopes. The dynamic amplification effect is greater for soft rock slopes than for hard rock slopes. The lithology has more effect on the dynamic response of the slopes than the rock structure. The lithology also more greatly influences the seismic amplification of layered slopes than homogeneous slopes. The MPGA ratios of homogeneous soft rock and homogeneous hard rock slopes are smaller than those of layered soft rock and layered hard rock slopes. The soft and hard rock slopes also show elevation and trend magnification effects. The elevation amplification effect of the layered slopes does not vary linearly as with homogeneous slopes. The weak interlayer interactions impact the slope amplification effect while the dynamic magnification effect of layered slopes with weak interlayer interactions is larger than for homogeneous slopes.
宋丹青, 黄进, 刘晓丽, 王恩志. 地震作用下岩体结构及岩性对高陡岩质边坡动力响应特征的影响[J]. 清华大学学报（自然科学版）, 2021, 61(8): 873-880.
SONG Danqing, HUANG Jin, LIU Xiaoli, WANG Enzhi. Influence of the rock mass structure and lithology on the dynamic response characteristics of steep rock slopes during earthquakes. Journal of Tsinghua University(Science and Technology), 2021, 61(8): 873-880.
[1] ZHOU J W, JIAO M Y, XING H G, et al. A reliability analysis method for rock slope controlled by weak structural surface[J]. Geosciences Journal, 2017, 21(3):453-467. [2] CHE A L, YANG H K, WANG B, et al. Wave propagations through jointed rock masses and their effects on the stability of slopes[J]. Engineering Geology, 2016, 201:45-56. [3] 林鹏, 刘晓丽, 胡昱, 等. 应力与渗流耦合作用下溪洛渡拱坝变形稳定分析[J]. 岩石力学与工程学报, 2013, 32(6):1145-1156. LIN P, LIU X L, HU Y, et al. Deformation stability analysis of Xiluodu arch dam under stress-seepage coupling condition[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(6):1145-1156. (in Chinese) [4] 胡波, 赵海滨, 王思敬, 等. 隧道锚围岩拉拔模型试验研究及数值模拟[J]. 岩土力学, 2009, 30(6):1575-1582. HU B, ZHAO H B, WANG S J, et al. Pull-out model test for tunnel anchorage and numerical analysis[J]. Rock and Soil Mechanics, 2009, 30(6):1575-1582. (in Chinese) [5] LIU X L, HAN G F, WANG E Z, et al. Multiscale hierarchical analysis of rock mass and prediction of its mechanical and hydraulic properties[J]. Journal of Rock Mechanics and Geotechnical Engineering, 2018, 10(4):694-702. [6] LIU X L, WANG S J, WANG S Y, et al. Fluid-driven fractures in granular materials[J]. Bulletin of Engineering Geology and the Environment, 2015, 74(2):621-636. [7] LIU H, XU Q, LI Y, et al. Response of high-strength rock slope to seismic waves in a shaking table test[J]. Bulletin of the Seismological Society of America, 2013, 103(6):3012-3025. [8] 黄润秋, 李为乐. "5.12"汶川大地震触发地质灾害的发育分布规律研究[J]. 岩石力学与工程学报, 2008, 27(12):2585-2592. HUANG R Q, LI W L. Research on development and distribution rules of geohazards induced by Wenchuan earthquake on 12th May, 2008[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(12):2585-2592. (in Chinese) [9] CHIGIRA M, WU X Y, INOKUCHI T, et al. Landslides induced by the 2008 Wenchuan earthquake, Sichuan, China[J]. Geomorphology, 2010, 118(3-4):225-238. [10] 刘汉香, 许强, 侯红娟. 岩性及岩体结构对斜坡地震加速度响应的影响[J]. 岩土力学, 2013, 34(9):2482-2488. LIU H X, XU Q, HOU H J. Influence of lithology and rock structure on slope seismic acceleration responses[J]. Rock and Soil Mechanics, 2013, 34(9):2482-2488. (in Chinese) [11] 邹威, 许强, 刘汉香, 等. 强震作用下层状岩质斜坡破坏的大型振动台试验研究[J]. 地震工程与工程振动, 2011, 31(4):143-149. ZOU W, XU Q, LU H X, et al. Large-scale shaking table model test study on failure of layered rocky slope under strong ground motion[J]. Journal of Earthquake Engineering and Engineering Vibration, 2011, 31(4):143-149. (in Chinese) [12] SONG D Q, CHE A L, ZHU R J, et al. Dynamic response characteristics of a rock slope with discontinuous joints under the combined action of earthquakes and rapid water drawdown[J]. Landslides, 2018, 15(6):1109-1125. [13] SONG D Q, CHE A L, CHEN Z, et al. Seismic stability of a rock slope with discontinuities under rapid water drawdown and earthquakes in large-scale shaking table tests[J]. Engineering Geology, 2018, 245:153-168. [14] SONG D Q, CHEN Z, KE Y T, et al. Seismic response analysis of a bedding rock slope based on the time-frequency joint analysis method:A case study from the middle reach of the Jinsha River, China[J]. Engineering Geology, 2020, 274:105731. [15] LIU G W, SONG D Q, CHEN Z, et al. Dynamic response characteristics and failure mechanism of coal slopes with weak intercalated layers under blasting loads[J]. Advances in Civil Engineering, 2020, 2020:5412795. [16] FAN G, ZHANG J J, WU J B, et al. Dynamic response and dynamic failure mode of a weak intercalated rock slope using a shaking table[J]. Rock Mechanics and Rock Engineering, 2016, 49(8):3243-3256. [17] HUANG J, LIU X L, ZHAO J, et al. Propagation of stress waves through fully saturated rock joint under undrained conditions and dynamic response characteristics of filling liquid[J]. Rock Mechanics and Rock Engineering, 2020, 53(8):3637-3655 [18] GOODMAN R E, BRAY J W. Toppling of rock slopes[C]//Proceedings of the Specialty Conference on Rock Engineering for Foundations and Slopes. 1976:201-234. [19] KUMAR R, KAUR M. Reflection and refraction of plane waves at the interface of an elastic solid and microstretch thermoelastic solid with microtemperatures[J]. Archive of Applied Mechanics, 2014, 84(4):571-590. [20] HUANG R Q, LI W L. Analysis of the geo-hazards triggered by the 12 May 2008 Wenchuan Earthquake, China[J]. Bulletin of Engineering Geology and the Environment, 2009, 68(3):363-371. [21] SONG D Q, CHEN Z, CHAO H, et al. Numerical study on seismic response of a rock slope with discontinuities based on the time-frequency joint analysis method[J]. Soil Dynamics and Earthquake Engineering, 2020, 133:106112.
2021, Vol. 61 
