MECHANICAL CHARACTERIZATION AND PARAMETER IDENTIFICATION OF RHEOLOGICAL DEFORMATION OF SUBGRADE COMPACTED SOIL
(1. Institute of Rheological Mechanics，Xiangtan University，Xiangtan，Hunan 411105，China；2. College of Civil Engineering and Mechanics，Xiangtan University，Xiangtan，Hunan 411105，China；3. Institute of Rheological Mechanics and Material Engineering，Central South University of Forestry and Technology，Changsha，Hunan 410004，China)
Abstract：To study the rheological properties of subgrade compacted soil，three kinds of subgrade compacted soil?s traditional direct-shear and consolidation experiments as well as consolidation creep and shear-consolidation coupled creep experiments were carried out respectively by using improving experimental devices. Their basic mechanical properties and creep experimental data were obtained. Using these experimental data，similar Maxwell rheological constitutive model of subgrade compacted soil was set up with three parameters，which was based on fractional calculus theory and Mittag-Leffler function；and its parameter was realized to automatic identification by introducing Deborah number，adopting area determinant function with weight and the manner of point-by-point searching. The results show that the established rheological constitutive model with a few of parameters fits the experimental data with accuracy；so it has a good application value.
殷德顺，任俊娟，和成亮，等. 一种新的岩土流变模型元件[J]. 岩石力学与工程学报，2007，26(9)：1 899-1 903.(YIN Deshun，REN Junjuan，HE Chengliang，et al. A new rheological model element for geomaterials[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(9)：1 899-1 903.(in Chinese))
交通部第二公路勘察设计院. 路基(第二版)[M]. 北京：人民交通出版社，2004.(Second Highway Engineering Investigation and Design Institute of the Ministry of Communications. Subgrade[M]. 2nd ed. Beijing：China Communications Press，2004.(in Chinese))
<body>Your browse does not support frame!</body> " target="_blank">
METZLERA R，THEO F N. Fractional relaxation processes and fractional rheological models for the description of a class of viscoelastic materials[J]. International Journal of Plasticity，2003，19(7)：941-959.
[12]
中华人民共和国行业标准编写组. JTG E40-2007公路土工试验规程[M]. 北京：人民交通出版社，2007.(The Professional Standards Compilation Group of People?s Republic of China. JTG E40-2007 Test methods of soils for highway engineering[M]. Beijing：China Communications Press，2007.(in Chinese))
<body>Your browse does not support frame!</body> " target="_blank">
谢 宁. 土流变试验设计及有关问题研究[J]. 云南工学院学报，1994，10(4)：76-82，92.(XIE Ning. Study of some problems in rheological test of soils[J]. Journal of Yunnan Institute of Technology，1994，10(4)：76-82，92.(in Chinese))
张为民. 一种采用分数阶导数的新流变模型理论[J]. 湘潭大学自然科学学报，2001，23(1)：30-36.(ZHANG Weimin. A new rheological model theory with fractional order derivatives[J]. Natural Science Journal of Xiangtan University，2001，23(1)：30-36.(in Chinese))
2011, Vol. 30 
