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| Cyclic and post-cyclic shear behavior of sand-geogrid interface under
different shear rates |
| LIU Feiyu1，WANG Pan1，WANG Jun2，CAI Yuanqiang2 |
| (1. Department of Civil Engineering，Shanghai University，Shanghai 200072，China；2. Architecture and Civil Engineering
College，Wenzhou University，Wenzhou，Zhejiang 325035，China)
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Abstract In order to investigate the influence of shear rate on cyclic and post-cyclic shear behavior of sand-geogrid interface，a series of large scale direct shear，cyclic shear and post-cyclic direct shear tests were performed. The effect of shear rate on shear stress and volumetric strain at interface was studied. Moreover，comparison was made between the direct shear and post-direct shear test results. The results showed that the shear rate had little effect on shear behavior of interface in direct shear tests. On contrary，the cyclic shear stress softening and hardening were observed in the cases of low shear rate and high shear rate respectively. The interface behavior was significantly affected by the shear rate in cyclic shear tests and the shear strength of interface was impaired by cyclic loading. Overall，the influence of shear rate in post-cyclic direct shear tests was evident.
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| [1] WASTI Y，?ZDüZGüN Z B. Geomembrane-geotextile interface shear properties as determined by inclined board and direct shear box tests[J]. Geotextiles and Geomembranes，2001，19(1)：45–57.
[2] BRIANCON L，GIRARD H，GOURC J P. A new procedure for measuring geosynthetic friction with an inclined plane[J]. Geotextiles and Geomembranes，2011，29(5)：472–482.
[3] KAMALZARE M，ZIRIE-MOAYED R. Influence of geosynthetic reinforcement on the shear strength characteristics of two-layer sub-grade[J]. Acta Geotechnica Slovenica，2011，8(1)：39–49.
[4] 刘 炜，汪益敏，陈页开，等. 土工格室加筋土的大尺寸直剪试验研究[J]. 岩土力学，2008，29(11)：3 133–3 138.(LIU Wei，WANG Yimin，CHEN Yekai，et al. Research on large size direct shear test for geocell reinforced soil[J]. Rock and Soil Mechanics，2008，29(11)：3 133–3 138.(in Chinese))
[5] 施有志，马时冬. 土工格栅的界面特性试验[J]. 岩土力学，2003，24(2)：296–299.(SHI Youzhi，MA Shidong. Test for interface characteristics of geogrid[J]. Rock and Soil Mechanics，2003，24(2)：296–299.(in Chinese))
[6] LIU C N，ZORNBERG J G，CHEN T C，et al. Behavior of geogrid-sand interface in direct shear mode[J]. Journal of Geotechnical and Geoenvironmental Engineering，2009，135(12)：1 863–1 871.
[7] 刘飞禹，林 旭，王 军. 砂土颗粒级配对筋土界面抗剪特性的影响[J]. 岩石力学与工程学报，2013，32(12)：2 575–2 582.(LIU Feiyu，LIN Xu，WANG Jun. Influence of particle-size gradation on shear behavior of geosynthetics and sand interface[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(12)：2 575–2 582.(in Chinese))
[8] DE A，ZIMMIE T F. Estimation of dynamic interfacial properties of geosynthetics[J]. Geosynthetics International，1998，5(1/2)：17–39.
[9] NYE C J，FOX P J. Dynamic shear behavior of a needle-punched geosynthetic clay liner[J]. Journal of Geotechnical and Geoenvironmental Engineering，2007，133(8)：973–983.
[10] ABDEL-RAHMAN A H，IBBRAHIM M A M. Soil/geogrid behavior subjected to cyclic loading[C]// Proceedings of the Geo-Frontiers 2011 Conference. Dallas，Texas：[s.n.]，2011：3 087–3 096.
[11] VIEIRA C S，LOPES M L，CALDEIRA L M. Sand-geotextile interface characterization through monotonic and cyclic direct shear tests[J]. Geosynthetics International，2013，20(1)：26–38.
[12] 徐 超，石志龙. 循环荷载作用下筋土界面抗剪特性的试验研究.岩土力学，2011，32(3)：655–660.(XU Chao，SHI Zhilong. Experimental research on shearing resistance property of sand-geogrid interface under cyclic load[J]. Rock and Soil Mechanics，2011，32(3)：655–660.(in Chinese))
[13] LOPES M L，LADEIRA M. Influence of the confinement，soil density and displacement rate on soil-geogrid interaction[J]. Geotextiles and Geomembranes，1996，14(10)：543–554.
[14] TAN S A，CHEW S H，WONG W K. Sand-geotextile interface shear strength by torsional ring shear tests[J]. Geotextiles and Geomembranes， 1998，16(3)：161–174.
[15] 徐 超，孟凡祥. 剪切速率和材料特性对筋–土界面抗剪强度的影响[J]. 岩土力学，2010，31(10)：3 101–3 106.(XU Chao，MENG Fanxiang. Effects of shear rate and material properties on shear strength of geosynthetic-soil interface[J]. Rock and Soil Mechanics，2010，31(10)：3 101–3 106.(in Chinese))
[16] 徐 超，陈洪帅，石志龙，等. 筋–土界面力学特性的水平循环剪切试验研究[J]. 岩土力学，2013，34(6)：1 553–1 559.(XU Chao，CHEN Hongshuai，SHI Zhilong，et al. Research on the mechanical behavior of soil-reinforcement interface by horizontal cyclic shear test[J]. Rock and Soil Mechanics，2013，34(6)：1 553–1 559.(in Chinese))
[17] MORACI N，CARDILE G. Influence of cyclic tensile loading on pullout resistance of geogrids embedded in a compacted granular soil[J]. Geotextiles and Geomembranes，2009，27(6)：475–487.
[18] 张 嘎，张建民. 循环荷载作用下粗粒土与结构接触面变形特性的试验研究[J]. 岩土工程学报，2004，26(2)：254–258.(ZHANG Ga，ZHANG Jianmin. Experimental study on cyclic behavior of interface between soil and structure[J]. Chinese Journal of Geotechnical Engineering，2004，26(2)：254–258.(in Chinese)) |
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2016, Vol. 35 
