%0 Journal Article
%A TANG Hao
%A DUAN Zhao
%A ZHAO Fa-suo
%A SONG Fei
%A LI Xiang-ning
%T Creep Damage Model of Q<sub>2</sub> Loess in Consideration ofMoisture Content Based on Fractional Calculus
%D 2015
%R 10.3969/j.issn.1001-5485.2015.08.014
%J Journal of Yangtze River Scientific Research Institute
%P 78-83
%V 32
%N 8
%X <p>Triaxial creep tests on Q<sub>2</sub> loess of different moisture contents were carried out to explore the creep properties of water-containing Q<sub>2</sub> loess. Test results show that the rheological property of Q<sub>2</sub> loess strengthens with the increase 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 results suggest that instantaneous deformation modulus <em>E</em><sub>H</sub> and viscoelastic coefficient <em>&xi;</em><sub>1</sub> 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 <em>D</em><sub>(&omega;)</sub>, which was further used to establish a nonlinear creep model 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 Q<sub>2</sub> loess,and has a good application prospect.</p>
%U http://ckyyb.crsri.cn/EN/10.3969/j.issn.1001-5485.2015.08.014