沥青砂粘弹特性试验研究-工程力学.PDFVIP

第 27 卷增刊 I Vol.27 Sup. I 工 程 力 学 2010 年 6 月 June 2010 ENGINEERING MECHANICS 200 文章编号：1000-4750(2010)Sup.I-0200-05 沥青砂粘弹特性实验研究 1 * 1,2 蔡宜洲 ， 叶 永 (1. 三峡大学土木水电学院，湖北，宜昌 443002 ；2. 华中科技大学力学系，湖北，武汉 430074) 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。 关键词：固体力学；沥青砂；蠕变实验；粘弹性；Burgers 模型；模型参数 中图分类号：O34 文献标识码：A EXPERIMENTAL RESEARCHES ON VISCOELASTIC BEHAVIOR OF ASPHALT SAND MIXTURE 1 * 1,2 CAI Yi-zhou , YE Yong (1. College of Civil and Hydroelectric Engineering, Three Gorges University, Yichang, Hubei 443002, China; 2. College of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China) Abstract: 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. Key words: solid mechanics; asphalt sand; creep test; viscoelastic; Burgers model; model parameter 沥青混凝土是