Effect of Strain-Softening in Design of Fills on Gently Inclined Areas with Soft Sensitive Clays View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

2013-07-12

AUTHORS

Hans Petter Jostad , P. Fornes , V. Thakur

ABSTRACT

The effect of strain softening in geotechnical design of fills in areas with soft sensitive clays is studied by a large number of finite element analyses. The reduction in undrained shear strength with increasing shear strain after the peak value will reduce the maximum fill height before failure compared with a perfectly plastic material. The finite element program Plaxis together with the material model NGI-ADPSoft are used in this study. A non-local strain formulation is used in NGI-ADPSoft to overcome the crucial problem of mesh dependent results typical for this type of problems. The effect of brittleness is then fully controlled by input parameters. The material properties are taken from NGI’s database of undrained shear test results on high quality block samples. The effect of strain-softening is quantified by establishing a scaling factor Fsoftening that gives the ratio between the calculated capacity without and with the effect of softening. The purpose is then that the peak undrained shear strength of sensitive clays simply can be divided by this factor before used in conventional limit equilibrium analyses with a strain independent (perfectly plastic) assumption to indirectly account for the effect of brittleness. More... »

PAGES

305-316

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-94-007-7079-9_24

DOI

http://dx.doi.org/10.1007/978-94-007-7079-9_24

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1025411382


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