Study on Shear Stress Relaxation Properties of Malan Loess
- 责任者：Geng Xingfu (Lanzhou Institute of Seismology ; CEA ; Lanzhou 730000 ; China) ; Li Baoxiong
- 刊名：Northwestern Seismological Journal
- 出版年：2010
- 卷期：32(1)
- 关键词：黄土类土 ; loessial soil ; 剪应力 ; shear stress
- 页码：p.36-41
- 图表：5 illus., 2 tables, 23 refs.
- 分类号：1702
- issnNo：ISSN1000-0844
- isbnNo：CN62-1048/P
The characteristics of the shear stress relaxation curves of Malan loess are studied based on 9 groups of shear stress relaxation test with different moisture contents under different pressure. Due to the unsatisfied fitting result from using the least squares method for the parameters of fractional order of standard linear model, the Monte Carlo method is used to fit the results. The results show that the shear stress relaxation characteristics of Malan loess can be described by the fractional order of standard linear model efficiently. Based on the fitting results the effective relaxation time and viscosity modulus are determined, and the shear stress relaxation properties are analyzed.