CAJ | 학술논문

试验选用近海地区分布广泛的粉土为研究对象，利用空心圆柱仪进行了模拟波浪荷载的循环三轴-扭剪耦合试验，探讨饱和粉土在不排水条件下的动强度特性，并对液化循环周数与无因次剪切应力比之间关系进行了曲线拟合。试验结果表明，在相同的剪切应力比下，循环三轴-扭剪耦合试验的破坏振次最少，循环纯扭剪最多，循环三轴介于二者之间。通过对加载效率的计算对不同应力路径下强度的差异进行了合理解释。
시험선용근해지구분포엄범적분토위연구대상，이용공심원주의진행료모의파랑하재적순배삼축-뉴전우합시험，탐토포화분토재불배수조건하적동강도특성，병대액화순배주수여무인차전절응력비지간관계진행료곡선의합。시험결과표명，재상동적전절응력비하，순배삼축-뉴전우합시험적파배진차최소，순배순뉴전최다，순배삼축개우이자지간。통과대가재효솔적계산대불동응력로경하강도적차이진행료합리해석。
The widespread silt in offshore area was used in the research, a series of cyclic triaxial-torsional coupling shear tests were performed on saturated silt by the hollow cylinder apparatus to simulate wave loading to study the dynamic strength charac-teristics of saturated silts under undrained conditions. Curve fitting was carried out on the relationship between liquefaction cyclic numbers and dimensionless shear stress ratio. The results show that:under the same shear stress ratio, failure in cyclic tri-axial-torsional coupling shear tests needs least vibration number, cyclic sheer torsional tests is the most and cyclic triaxial tests is in between. Reasonable explanations on the strength differences from different stress paths were made based on the calcula-tion of loading efficiency.