沥青玛蹄脂粘弹性模型参数分段线性拟合法-交通运输工程学报-长安.PDFVIP

第7 卷　第3 期 交 通 运 输 工 程 学 报 Vol.7　No.3 2007 年6 月 Journal of Traffic and Transportation Engineering Jun.2007 :1671-1637(2007)03-0066-04 1, 3 2, 3 1, 3 1 田　莉 ,胡霞光 ,刘　玉 ,沙爱民 (1. , 　710064;2. , 　200092;3., 　450006) 　:分析了沥青玛蹄脂 态蠕变曲线的特点, 应用分段拟合法对曲线的起始与末尾段进行线性 拟合,研究了剪切蠕变条件下沥青玛蹄脂粘弹性Burgers 模型参数取值, 并与传统方法进行了对 比。发现在低温条件下,两种方法的平均误差基本保持在5%以内,而传统方法的最大误差超过了 20%,分段拟合法仅有小时间段超过5%;高温条件下, 传统方法测定Burgers 模型参数比较困难, 而分段拟合法平均误差小于0.01%。研究结果表明:分段拟合法误差相对较小,易于操作, 是确定 Burgers 模型参数的有效方法。 :路面工程;沥青玛蹄脂;Burgers 模型;参数求解;分段线性拟合法 :414　　　:A Sectioned linear fitting method of parameters for asphalt masticsviscoelastic Burgers model 1, 3 2, 3 1, 3 1 Tian Li , Hu Xia-guang , Liu Yu , Sha Ai-min (1.School of Highway, Chang an niversity, Xian 710064, Shaanxi, China;2.Key Laboratory of Road and T raffic Engineering of Ministry of Education, Tongji niversity, Shanghai 200092, China; 3.Henan Transportation Research Institute, Zhengzhou 450006, Henan, China) Abstract:The static creep curve character of asphalt mastics was analyzed, the head section and end section of the curve were fitted by sectioned linear fitting method, the parameters of asphalt mastics viscoelastic Burgers model were solved in the condition of shear creep, and sectioned linear fitting method was compared with traditional method.It is pointed that in low temperature, the average errors of two methods are less than 5%, but the maximal error of traditional method is more than 20%, and the error of sectioned linear fitting method is more than 5%only in a small time range;under high temperature, Burg