中文摘要：

为研究不同加筋材料对筋-土界面在静力、动力作用下的剪切特性的影响,采用大型直剪仪对土工编织布、土工无纺布、土工膜加筋的加筋土界面进行了一系列单调直剪试验、循环直剪试验和循环后单调直剪试验,并将单调直剪试验与循环后单调直剪试验的结果进行对比分析.结果表明：单调直剪试验中,界面剪应力-剪切位移关系由于加筋筋材力学特性与结构特征不同,呈现出较大差别,其中筋材在较大竖向应力的剪切过程中容易发生变形;在循环剪切过程中,土工编织布、土工无纺布界面抗剪强度发生了软化现象,而土工膜界面抗剪强度则发生了硬化现象.

英文摘要：

To investigate the reinforcement soil interface cyclic and post-cyclic shear behavior in different geosynthetic materials （woven geotextile, nonwoven geotextile, geomem- brane）, a series of direct shear tests, cyclic shear tests and post-cyclic direct shear tests were performed through a large-scale direct shear device. Comparison and analysis were made between the results from direct shear tests and post-cyclic direct shear tests. In the direct shear tests, the interface shear stress-displacement curve presented large difference due to different material mechanical properties and structural characteristics. More evident deformation was observed in higher vertical stress. Cyclic shear stress degradation was observed in both woven and nonwoven geotextile-sand interfaces, whereas hardening phenomenon appeared in the geomembrane-sand interface.