论文部分内容阅读
利用自主研制的大型结构面剪切仪完成了一系列界面直剪试验,探讨在法向循环荷载与静荷载两种条件下土工格栅与石英砂界面的抗剪性能,比较其在两种法向荷载下的异同点。试验结果表明:循环荷载作用下剪应力随剪切位移的发展趋势与静荷载下的有相似之处,但曲线本身表现出了循环发展的特性;循环荷载作用下剪应力峰值和谷值的最大值与法向应力的关系近似符合摩尔-库仑定律;循环剪应力最大值随着法向循环荷载频率的增加而减小,但随着振幅的增加而逐渐增大;循环荷载下筋土界面剪应力随位移而波动,始终处于振幅上下限所对应静荷载下剪应力之间,相关物理量之间具体的定量关系需要进一步研究。
A series of direct shear tests of the interface were carried out by using the self-developed large-scale structural surface shear. The shear resistance of the interface between the geogrid and the quartz sand under normal cyclic load and static load was discussed. Similarities and differences to the load point. The experimental results show that the tendency of shear stress with shear displacement under cyclic loading is similar to that under static load, but the curve itself shows the characteristics of cyclic development. The maximum of shear stress peak and valley under cyclic loading The relationship between value and normal stress approximates Moore-Coulomb’s law. The maximum value of cyclic shear stress decreases with the increase of normal cyclic loading frequency, but increases with the increase of amplitude. Under cyclic loading, The stress fluctuates with the displacement, and always stays in the shear stress under the static load corresponding to the amplitude upper and lower limits. The specific quantitative relationship between the related physical quantities needs further study.