循环荷载作用下土工格栅加筋粉质粘土动强度及变形试验研究  

Dynamic strength and deformation test research on geogrid reinforced silty clay under cyclic loading

作　　者：简斌[1] 王宁[1] 韩志型[1] 李文旭 

机构地区：[1]西南科技大学,四川绵阳621010 [2]内江市住房和城乡建设局,四川内江641000

出　　处：《四川建筑科学研究》2015年第5期71-75,共5页Sichuan Building Science

摘　　要：进行了循环荷载作用下土工格栅加筋粉质粘土动三轴试验。结果表明:加筋粉质粘土动强度随着动应力幅值及加筋层数的变化表现出良好的规律性;振动前期轴向累积应变随振次增加很快,当动应力低于破坏动应力时,随着振动次数的继续增加,轴向累积应变趋于稳定;而当动应力大于破坏动应力时,轴向累积应变增速较振动初期慢得多,整体仍呈非线性增大,试样最终失稳破坏;轴向累积应变发展随动应力幅值及加筋层数变化表现出较好的规律性。The results of geogrid reinforced silty clay dynamic triaxial test under cyclic loading show that the dynamic strength of reinforced silty clay shows good regularity with the change of dynamic stress amplitude and reinforced layers. The axial accumulated strain increases quickly with vibration times during early vibration stage. It remains stable with vibration times continuing increasing if the dynamic stress is less than the failure dynamic stress. When the dynamic stress is greater than the failure dynamic stress,the axial accumulated strain increases more slowly than initial vibration,and which increases nonlinearly,the sample will eventually instability destroy. The development of axial accumulated strain shows good regularity along with the change of dynamic stress amplitude and reinforcement layers.

关 键 词：加筋粉质粘土 循环荷载 动三轴试验 动强度 动应变 

分 类 号：TU472.34[建筑科学—结构工程]