Dynamic modelling of retrogressive landslides with emphasis on the role of clay sensitivity |
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| Authors: | Xue Zhang Scott W Sloan Eugenio Oñate |
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| Affiliation: | 1. Department of Civil Engineering and Industrial Design, School of Engineering, University of Liverpool, Liverpool, UK;2. International Centre for Numerical Methods in Engineering (CIMNE), Barcelona, Spain;3. ARC Centre of Excellence for Geotechnical Science and Engineering, University of Newcastle, Callaghan, Australia |
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| Abstract: | This paper presents a detailed numerical study of the retrogressive failure of landslides in sensitive clays. The dynamic modelling of the landslides is carried out using a novel continuum approach, the particle finite element method, complemented with an elastoviscoplastic constitutive model. The multiwedge failure mode in the collapse is captured successfully, and the multiple retrogressive failures that have been widely observed in landslides in sensitive clays are reproduced with the failure mechanism, the kinematics, and the deposition being discussed in detail. Special attention has been paid to the role of the clay sensitivity on each retrogressive failure as well as on the final retrogression distance and the final run‐out distance via parametric studies. Moreover, the effects of the viscosity of sensitive clays on the failure are also investigated for different clay sensitivities. |
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| Keywords: | landslides PFEM retrogressive failure sensitive clay strain softening |
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