摘要
进行了沥青砂在不同加载应力和不同实验温度下单轴压缩蠕变实验,得到其在不同实验条件下的蠕变曲线,选择Burgers模型,编制非线性拟合程序,求得模型参数值,通过相关性分析,得到了模型参数与温度和应力函数关系式,分析了模型参数对沥青砂蠕变性能的影响,最后进行模型预测值与实验结果对比,结果表明Burgers模型能够描述沥青砂蠕变过程的第一阶段、第二阶段,反映了其粘弹特性。
The uniaxial creep experiments of asphalt sand under five different stresses and test temperatures were conducted.Their creep curves were known and the viscoelastic characteristics of Burgers model were investigated.On basis of least squares techniques,the nonlinear fit procedure can be used to obtain the model parameters as functions of loading stresses and test temperatures.At last,a comparison between the model prediction and experimental results is carried out,showing good agreement in the first and second stages of test creep curve of sand asphalt mixture.
出处
《工程力学》
EI
CSCD
北大核心
2010年第A01期200-204,共5页
Engineering Mechanics
基金
国家自然科学基金项目(10672063)
