岩土力学2011，Vol.32Issue(3)：655-660,6.
循环荷载作用下筋土界面抗剪特性的试验研究
Experimental research on shearing resistance property of sand-geogrid interface under cyclic load
摘要
Abstract
A series of direct shear tests were performed using self-developed large-scale interface shear apparatus to investigate the shearing resistance properties of sand-geogrid interface and compare the experimental results under normal cyclic load with those under static load.The test results demonstrate that the development trend of shear stress-displacement curves under cyclic load are similar to those under static load; but the shear curves under cyclic load show cyclic development characteristics; the relationships between the maximal shear stress of peak value and normal stress, and the maximal shear stress of trough value and normal stress both conform basically to Mohr-Coulomb rule; the maximal shear strength under cyclic load decreases with the increasing of frequency, but increases with amplitude increasing; the shear strength under cyclic load fluctuates with shear displacement, but is always in between the upper and lower boundaries defined by the shear stress under corresponding static normal stresses; the specific quantitative relationship among these related physical variables needs further researches.关键词
筋土界面/抗剪特性/直剪试验/法向循环荷载/结构面剪切仪Key words
sand-geogrid interface/ shearing resistance property/ direct shear test/ normal cyclic load/ interface shear apparatus分类
建筑与水利引用本文复制引用
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[J].岩土力学,2011,32(3):655-660,6.基金项目
国家自然科学基金(No.50878154 ) （No.50878154 ）
上海市重点学科建设项目资助(No.B308). （No.B308）
