Investigation on seismic response of a three-stage soil slope supported by anchor frame structure

Abstract

Based on a typical prototype of a soil slope in engineering practice, a numerical model of a three-stage soil slope supported by the anchor frame structure was established by means of FLAC^3D code. The dynamic responses of three-stage soil slope and frame structure were studied by performing a series of bidirectional Wenchuan motions in terms of the failure mode of three-stage structure, the acceleration of soil slope, the displacement of frame structure, and the anchor stress of frame structure. The response accelerations in both horizontal and vertical directions are the most largely amplified at the slope top of each stage subjected to different shaking cases. The platforms among the stages reduce the amplification effect of response acceleration. The residual displacement of frame structure increases significantly as the intensity of shaking case increases. The frame structure at each stage presents a combined displacement mode consisting of a translation and a rotation around the vertex. The anchor stress of frame structure is mainly increased by the first intense pulse of Wenchuan seismic wave, and it is sensitive to the intensity of shaking case. The anchor stress of frame structure at the first stage is the most considerably enlarged by earthquake loading.

Keywords

three-stage soil slope / anchor frame structure / acceleration / displacement / anchor stress

References

[1] SunP, LiR-j, JiangH, IgweO, ShiJ-s. Earthquake-triggered landslides by the 1718 Tongwei earthquake in Gansu province, northwest China [J]. Bulletin of Engineering Geology and the Environment, 2017, 76(4): 1281-1295

[2] XuC, XuX-w, ShyuJ B H. Database and spatial distribution of landslides triggered by the Lushan, China Mw 6.6 earthquake of 20 April 2013 [J]. Geomorphology, 2015, 248: 77-92

[3] LingH I, LeshchinskyD, ChouN N S. Post-earthquake investigation on several geosynthetic-reinforced soil retaining walls and slopes during the Ji-Ji earthquake of Taiwan [J]. Soil Dynamics and Earthquake Engineering, 2001, 21(4): 297-313

[4] ZhangJ, QuH-l, LiaoY, MaY-x. Seismic damage of earth structures of road engineering in the 2008 Wenchuan earthquake [J]. Environmental Earth Sciences, 2012, 65(4): 987-993

[5] HackR, AlkemaD, KruseG, LeendersN, LuziL. Influence of earthquakes on the stability of slopes [J]. Engineering Geology, 2007, 91(1): 4-15

[6] WuZ-j, WangL-m, WangP, ChenT, ShiH, YangX-p. Influence of site conditions on ground motion at far field loess sites during strong earthquake [J]. Journal of Central South University, 2013, 20(8): 2333-2341

[7] LiX-p, WuY, HeS-m. Seismic stability analysis of gravity retaining walls [J]. Soil Dynamics and Earthquake Engineering, 2010, 30(10): 875-878

[8] XuJ-s, YangX-l. Seismic and static stability analysis for 3D reinforced slope in nonhomogeneous and anisotropic soils [J]. International Journal of Geomechanics, 2018, 18(7): 04018065

[9] LinY-l, YangG-l, LiY, ZhaoL-h. Engineering behaviors of reinforced gabion retaining wall based on laboratory test [J]. Journal of Central South University of Technology, 2010, 1761351-1356

[10] ChenR H, ChiuY M. Model tests of geocell retaining structures [J]. Geotextiles and Geomembranes, 2008, 26(1): 56-70

[11] LiJ, ThamL G, JunaideenS M, YueZ Q, LeeC F. Loose fill slope stabilization with soil nails: Full-scale test [J]. Journal of Geotechnical and Geoenvironmental Engineering, 2008, 134(3): 277-288

[12] ChehadeH A, DiasD, SadekM, JenckO, ChehadeF H. Seismic analysis of geosynthetic-reinforced retaining wall in cohesive soils [J]. Geotextiles and Geomembranes, 2019, 47(3): 315-326

[13] SeedH B. Considerations in the earthquake resistant design of earth and rock fill dams [J]. Geotechnique, 1979, 29(3): 215-263

[14] AbouzarS. Pseudo-static lateral earth pressures on broken-back retaining walls [J]. Canadian Geotechnical Journal, 2010, 47(11): 1247-1258

[15] RanjbarA, KarkanakiN, GanjianF A. Pseudo-static analysis of cantilever retaining walls using upper bound limit analysis approach [J]. Journal of Central South University, 2019, 26(1): 241-255

[16] LinY-l, LengW-m, YangG-l, ZhaoL-h, LiL, YangJ-s. Seismic active earth pressure of cohesive-frictional soil on retaining wall based on a slice analysis method [J]. Soil Dynamics and Earthquake Engineering, 2015, 70: 133-147

[17] LinY-l, YangX, YangG-l, LiY, ZhaoL-h. A closed-form solution for seismic passive earth pressure behind a retaining wall supporting cohesive-frictional backfill [J]. Acta Geotechnica, 2017, 12(2): 453-461

[18] BakerR, ShukhaR, OpersteinV, FrydmanS. Stability charts for pseudo-static slope stability analysis [J]. Soil Dynamics and Earthquake Engineering, 2006, 26(9): 813-823

[19] GhoshS, ShamrmaR. Pseudo-dynamic active response of non-vertical retaining wall supporting c-ψ backfill [J]. Geotechnical and Geological Engineering, 2010, 28(5): 633-641

[20] GhoshP. Seismic vertical uplift capacity of horizontal strip anchors using pseudo-dynamic approach [J]. Computers and Geotechnics, 2009, 36(12): 342-351

[21] GhoshP. Seismic active earth pressure behind a nonvertical retaining wall using pseudo-dynamic analysis [J]. Canadian Geotechnical Journal, 2008, 45(1): 117-123

[22] HeS-m, OuyangC-j, LuoY. Seismic stability analysis of soil nail reinforced slope using kinematic approach of limit analysis [J]. Environmental Earth Sciences, 2011, 66(1): 319-326

[23] YanM-j, XiaY-y, LiuT-t, BowaV M. Limit analysis under seismic conditions of a slope reinforced with prestressed anchor cables [J]. Computer and Geotechnics, 2019, 108: 226-223

[24] NewmarkN M. Effects of earthquakes on dams and embankment: Fifth Rankine lecture [J]. Geotechnique, 1965, 25(2): 139-159

[25] MichalowskiR L. Displacements of multiblock geotechnical structures subjected to seismic excitation [J]. Journal of Geotechnical and Geoenvironmental Engineering, 2007, 133(11): 1432-1439

[26] LinY-l. Deformation behavior of reinforced embankment slopes under seismic excitation [J]. Disaster Advances, 2013, 6(7): 12-19

[27] LeeK Z Z, ChangN Y, KoH Y. Numerical simulation of geosynthetic-reinforced soil walls under seismic shaking [J]. Geotextiles and Geomembranes, 2010, 28(4): 317-334

[28] WangL, ChenS, GaoP. Research on seismic internal forces of geogrids in reinforced soil retaining wall structures under earthquake actions [J]. Journal of Vibroengineering, 2014, 16(4): 2023-2034

[29] WilsonP, ElgamalA. Large-scale passive earth pressure load-displacement tests and numerical simulation [J]. Journal of Geotechnical and Geoenvironmental Engineering, 2010, 136(12): 1634-1643

[30] LinY-l, LiY-x, YangG-l, LiY. Experimental and numerical study on the seismic behavior of anchoring frame beam supporting soil slope on rock mass [J]. Soil Dynamics and Earthquake Engineering, 2017, 98: 12-23

[31] LinY-l, YangG-l, YangX, ZhaoL-h, ShenQ, QiuM-m. Response of gravity retaining wall with anchoring frame beam supporting a steep rock slope subjected to earthquake loading [J]. Soil Dynamics and Earthquake Engineering, 2017, 92: 633-649

[32] LinY-l, ChengX-m, YangG-l. Shaking table test and numerical simulation on a combined retaining structure response to earthquake loading [J]. Soil Dynamics and Earthquake Engineering, 2018, 108: 29-45

[33] LinY-l, ChengX-m, YangG-l. Seismic response of a sheet-pile wall with anchoring frame beam by numerical simulation and shaking table test [J]. Soil Dynamics and Earthquake Engineering, 2018, 118: 352-364

[34] LinY-l, LuL, YangG-l. Seismic behavior of a single-form lattice anchoring structure and a combined retaining structure supporting soil slope: A comparison [J]. Environmental Earth Sciences, 2020, 79(3): 78

[35] YeH-l, HuangR-q, ZhengY-r, DuX-l, LiA-h. Sensitivity analysis of parameters for bolts in rock slopes under earthquakes [J]. Chinese Journal of Geotechnical Engineering, 2010, 3291374-1379(in Chinese)

[36] YazdandoustM. Laboratory evaluation of dynamic behavior of steel-strip mechanically stabilized earth walls [J]. Soils and Foundations, 2018, 58(2): 264-276

[37] LeeK Z Z, ChangN Y, KoH Y. Numerical simulation of geosynthetic-reinforced soil walls under seismic shaking [J]. Geotextiles and Geomembranes, 2010, 28(4): 317-334

[38] LinY-l, ShiF, YangX, YangG-l, LiL-m. Numerical analysis on seismic behavior of railway earth embankment: A case study [J]. Journal of Central South University, 2016, 23(4): 906-918

[39] LinY-l, YangG-l. Dynamic behavior of railway embankment slope subjected to seismic excitation [J]. Natural Hazards, 2013, 69(1): 219-235

[40] LinY-l, LengW-m, YangG-l, LiL, YangJ-s. Seismic response of embankment slopes with different reinforcing measures in shaking table tests [J]. Natural Hazards, 2015, 76(2): 791-810

[41] HuangC C, HorngJ C, ChangW J, ChuehS Y, ChiouJ S, ChenC H. Dynamic behavior of reinforced slopes: horizontal acceleration response [J]. Geosynthetics International, 2010, 17(4): 207-219

[42] LinY-l, ZhaoL-h, YangT Y, YangG-l, ChenX-b. Investigation on seismic behavior of combined retaining structure with different rock shapes [J]. Structural Engineering and Mechanics, 2020, 73(5): 599-612

[43] WangL-p, ZhangG. Centrifuge model test study on pile reinforcement behavior of cohesive soil slopes under earthquake conditions [J]. Landslides, 2013, 11(2): 213-223

[44] YangB, LuoY, JengD S, FengJ. Effects of moisture content on the dynamic response and failure mode of unsaturated soil slope subjected to seismic load [J]. Bulletin of the Seismological Society of America, 2019, 109(2): 489-504

[45] LinY-l. Shaking table modeling of embankment slope response to earthquake loading [J]. Disaster Advances, 2013, 6(12): 69-77

[46] FanG, ZhangJ J, WuJ B, YanKM. 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