Significance of the actual nonlinear slope geometry for catastrophic failure in submarine landslides

Proceedings. Mathematical, Physical, and Engineering Sciences
Alexander M PuzrinAndrew J Hill

Abstract

A simple approach to slope stability analysis of naturally occurring, mild nonlinear slopes is proposed through extension of shear band propagation (SBP) theory. An initial weak zone appears in the steepest part of the slope where the combined action of gravity and seismic loads overcomes the degraded peak shear resistance of the soil. If the length of this steepest part is larger than the critical length, the shear band will propagate into the quasi-stable parts of the slope, where the gravitational and seismically induced shear stresses are smaller than the peak but larger than the residual shear strength of the soil. Growth of a shear band is strongly dependent on the shape of the slope, seismic parameters and the strength of soil and less dependent on the slope inclination and the sensitivity of clay. For the slope surface with faster changing inclination, the criterion is more sensitive to the changes of the parameters. Accounting for the actual nonlinear slope geometry eliminates the main challenge of the SBP approach-determination of the length of the initial weak zone, because the slope geometry can be readily obtained from submarine site investigations. It also helps to identify conditions for the early arrest of the s...Continue Reading

References

Feb 20, 1993·Biochimica Et Biophysica Acta·W D EdwardsA Cryer
Jul 18, 2006·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·D G MassonF Løvholt
Dec 23, 2006·Journal of Inherited Metabolic Disease·L SwartsH E Henderson

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Citations

Mar 22, 2016·Proceedings. Mathematical, Physical, and Engineering Sciences·Leonid N GermanovichAlexander M Puzrin
Feb 21, 2018·Nature Communications·Judith ElgerWolfram H Geissler
Aug 20, 2019·Proceedings. Mathematical, Physical, and Engineering Sciences·Alexander M PuzrinItai Einav

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