CAJ | 학술논문

为探索含水 Q2黄土的蠕变特性，对 Q2黄土进行不同含水状态下的三轴蠕变试验，试验结果表明随着含水率的增高，Q2黄土的流变性能增强。基于分数阶微积分构造的软体元件可描述理想的固体与流体之间材料性质的特性，选用包含软体元件在内的四元件非线性蠕变模型对试验数据进行回归计算拟合求参，并对不同含水率下的模型参数进行分析。结果显示：瞬时变形模量 EH 与黏弹性系数ξ1均随含水率增加呈指数形式递减；引入含水损伤变量 D（ω），计算得出各蠕变参数含水损伤演化方程，进而建立考虑含水损伤的非线性蠕变模型，通过应用试验数据对其进行验证，结果表明基于分数阶微积分的含水损伤蠕变模型能够有效地描述 Q2黄土的整体流变特征，模型具有较好的应用前景。
위탐색함수 Q2황토적연변특성，대 Q2황토진행불동함수상태하적삼축연변시험，시험결과표명수착함수솔적증고，Q2황토적류변성능증강。기우분수계미적분구조적연체원건가묘술이상적고체여류체지간재료성질적특성，선용포함연체원건재내적사원건비선성연변모형대시험수거진행회귀계산의합구삼，병대불동함수솔하적모형삼수진행분석。결과현시：순시변형모량 EH 여점탄성계수ξ1균수함수솔증가정지수형식체감；인입함수손상변량 D（ω），계산득출각연변삼수함수손상연화방정，진이건립고필함수손상적비선성연변모형，통과응용시험수거대기진행험증，결과표명기우분수계미적분적함수손상연변모형능구유효지묘술 Q2황토적정체류변특정，모형구유교호적응용전경。
Triaxial creep tests on Q2 loess of different moisture contents were carried out to explore the creep proper-ties of water-containing Q2 loess.Test results show that the rheological property of Q2 loess strengthens with the in-crease of moisture content.Furthermore,since the soft-matter element built by fractional calculus could simulate the material between ideal solid and ideal fluid,a four-element nonlinear creep model which contains the soft-matter element was applied to fit data,and the model parameters under different moisture contents were analyzed.The re-sults suggest that instantaneous deformation modulus EH and viscoelastic coefficient ξ1 have a negative relationship with moisture content with an exponential decline.A water damage evolution equation of each creep parameter was obtained by introducing the water damage variable D(ω),which was further used to establish a nonlinear creep mod-el in consideration of water damage effect.The nonlinear creep model was verified by test data.It was proved that the nonlinear creep model considering water damage could effectively characterize the overall rheological property of Q2 loess,and has a good application prospect.