- Title
- Modeling of non-stationary random field of undrained shear strength of soil for slope reliability analysis
- Creator
- Jiang, Shui-Hua; Huang, Jinsong
- Relation
- Soils and Foundations Vol. 58, Issue 1, p. 185-198
- Publisher Link
- http://dx.doi.org/10.1016/j.sandf.2017.11.006
- Publisher
- Japanese Geotechnical Society
- Resource Type
- journal article
- Date
- 2018
- Description
- The spatial variability of soil properties is often assumed to be modeled as stationary or weakly stationary random fields in slope reliability analyses. However, abundant site-specific data have revealed that the mean and standard deviation of soil properties, such as the undrained shear strength of soil, change with depth. Thus, the non-stationary characteristics of soil properties need to be properly accounted for. The aim of this paper is to propose a non-stationary random field (RF) model for the characterization of the spatial variability and the depth-dependent nature of the undrained shear strength of soil. With the proposed model, the uncertainties of the trend and fluctuating components can be modeled individually. As an example, a clay slope under undrained conditions is investigated to illustrate the proposed model. A subset simulation is carried out to evaluate the slope reliability incorporating the non-stationary characteristics of soil properties. The advantages of the proposed model, relative to the existing non-stationary RF models and the commonly-used stationary RF model in the literature, are demonstrated through a series of sensitivity studies.
- Subject
- slope reliability; undrained shear strength; spatial variability; non-stationary random field; trend component
- Identifier
- http://hdl.handle.net/1959.13/1402040
- Identifier
- uon:34999
- Identifier
- ISSN:0038-0806
- Language
- eng
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