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| TEST INVESTIGATIONS ON 3D STRESS-CONTROLLED CYCLIC BEHAVIOR OF GRAVEL-STRUCTURE INTERFACE |
| FENG Dakuo1，2，HOU Wenjun3，ZHANG Jianmin1，2 |
(1. State Key Laboratory of Hydroscience and Engineering，Tsinghua University，Beijing 100084，China；2. Institute of Geotechnical Engineering，Tsinghua University，Beijing 100084，China；3. Department of Building Energy Efficiency and Science and
Technology，Ministry of Housing and Urban-rural Development of People's Republic of China，Beijing 100835，China) |
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Abstract Applied with a large-scale direct shear apparatus，the 3D stress-controlled cyclic behavior of a gravel- structure interface was investigated and the influence of the shear path and stress amplitude was discussed. The tests were performed at normal stress of 400 kPa in two-way cross，one-way and two-way circular cyclic shear paths. Results indicate that：(1) The volumetric change of interface between coarse grained soil and structure can be divided into reversible and irreversible components in two-way cyclic shear paths. (2) Irreversible increment is dominant in the first few shear cycles，and then equivalent to reversible component which finally becomes the governing part of interface volumetric increment；but the volumetric change of interface gives priority to irreversible component. (3) Tangential displacement migrates with shear cycles. Interface exhibits non-coaxial behavior in the tangential direction for circular shear tests；tangential displacement amplitude and increment per shear stress decrease with shear cycles when the shear stress amplitude is relatively small. (4) With the increasing shear stress amplitude，non-coaxial angle decreases and tangential displacement and tangential displacement increment per shear stress both increase. Non-coaxial angle varies little with shear cycles in one-way circular shear path，while it has opposite algebraic sign at neighboring shear cycles in two-way circular shear path. (5) Tangential stress-tangential displacement curves present an elliptical shape in circular path and hyperbolic in cross shear path. Shear path and shear stress amplitude have notable influence on the 3D stress-controlled cyclic behaviors of interface.
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Received: 27 April 2011
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| [1] POTYONDY J G. Skin friction between various soils and construction materials[J]. Geotechnique，1961，11(4)：339–353.
[2] DESAI C S，DRUMM E C，ZAMAN M M. Cyclic testing and modeling of interfaces[J]. Journal of Geotechnical and Geoenvironmental Engineering，1985，111(6)：793–815.
[3] UESUGI M，KISHIDA H. Influential factors of friction between steel and dry sands[J]. Soils and Foundations，1986，26(2)：33–46.
[4] TSUBAKIHARA Y，KISHIDA H. Frictional behaviour between normally consolidated clay and steel by two direct shear type apparatuses[J]. Soils and Foundations，1993，33(2)：1–13.
[5] PAIKOWSKY S G，PLAYER C M，CONNORS P J. A dual interface apparatus for testing unrestricted friction of soil along solid surfaces[J]. Geotechnical Testing Journal，1995，18(2)：168–193.
[6] FROST J D，DEJONG J T，RECALDE M. Shear failure behavior of granular-continuum interfaces[J]. Engineering Fracture Mechanics，2002，69(17)：2 029–2 048.
[7] HU L M，PU J L. Testing and modeling of soil-structure interface[J]. Journal of Geotechnical and Geoenvironmental Engineering，2004，130(8)：851–860.
[8] FAKHARIAN K，EVGIN E. Cyclic simple-shear behavior of sand- steel interfaces under constant normal stiffness condition[J]. Journal of Geotechnical and Geoenvironmental Engineering，1997，123(12)：1 096–1 105.
[9] 冯大阔，侯文峻，张建民，等. 不同法向边界条件接触面三维力学特性的试验研究[J]. 岩土力学，2010，31(8)：2 419–2 424.(FENG Dakuo，HOU Wenjun，ZHANG Jianmin，et al. Experimental study of 3D cyclic behavior of interface under different normal boundary conditions[J]. Rock and Soil Mechanics，2010，31(8)：2 419–2 424.(in Chinese))
[10] 殷宗泽，朱 泓，许国华. 土与结构材料接触面的变形及其数学模拟[J]. 岩土工程学报，1994，16(3)：14–22.(YIN Zongze，ZHU Hong，XU Guohua. Numerical simulation of the deformation in the interface between soil and structural material[J]. Chinese Journal of Geotechnical Engineering，1994，16(3)：14–22.(in Chinese))
[11] 高俊合，俞海学，赵维炳. 土与混凝土接触面特性的大型单剪试验研究及数值模拟[J]. 土木工程学报，2000，33(4)：42–46.(GAO Junhe，YU Haixue，ZHAO Weibing. Characteristics study of interface between soil and concrete by using large size single shear apparatus and numerical analysis[J]. China Civil Engineering Journal，2000，33(4)：42–46.(in Chinese))
[12] 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))
[13] 周小文，龚壁卫，丁红顺，等. 砾石垫层—混凝土接触面力学特性单剪试验研究[J]. 岩土工程学报，2005，27(8)：876–880.(ZHOU Xiaowen，GONG Biwei，DING Hongshun，et al. Large-scale simple shear test on mechanical properties of interface between concrete face and gravel underlayer[J]. Chinese Journal of Geotechnical Engineering，2005，27(8)：876–880.(in Chinese))
[14] 张建民，侯文峻，张 嘎，等. 大型三维土与结构接触面试验机的研制与应用[J]. 岩土工程学报，2008，30(6)：889–894.(ZHANG Jianmin，HOU Wenjun，ZHANG Ga，et al. Development and application of 3D soil-structure interface test apparatus[J]. Chinese Journal of Geotechnical Engineering，2008，30(6)：889–894.(in Chinese))
[15] 彭 凯，朱俊高，张 丹，等. 粗粒土与混凝土接触面特性单剪试验研究[J]. 岩石力学与工程学报，2010，29(9)：1 893–1 900.(PENG Kai，ZHU Jungao，ZHANG Dan，et al. Study of mechanical behaviors of interface between coarse-grained soil and concrete by simple shear test[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(9)：1 893–1 900.(in Chinese)) |
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2011, Vol. 30 
