Numerical simulations and predictive models of undrained penetration in soft soils
| Title: | Numerical simulations and predictive models of undrained penetration in soft soils |
| Author: | Shi, Han |
| Abstract: | There are two aspects in this study: cylinder penetrations and XBP (Expendable Bottom Penetrometer) interpretations. The cylinder studies firstly investigate the relationship between the soil resisting force and penetration depth by a series of rateindependent finite element analyses of pre-embedded penetration depths, and validate the results by upper and lower bound solutions from classical plasticity theory. Furthermore, strain rate effects are modeled by finite element simulations within a framework of rate-dependent plasticity. With all forces acting on the cylinder estimated, penetration depths are predicted from simple equations of motion for a single particle. Comparisons to experimental results show reasonable agreement between model predictions and measurements. The XBP studies follow the same methodology in investigating the soil shearing resistance as a function of penetration depth and velocity by finite element analyses. With the measurements of time decelerations during penetration of the XBP, sediment shear strength profile is inferred from a single particle kinetic model. The predictions compare favorably with experimental measurements by vane shear tests. |
| Publisher: | Texas A&M University |
| Subject: |
cylinder penetration
strength characterization strain rate |
| URI: | http://hdl.handle.net/1969.1/2555 |
| Date: | 2005-08 |
Citation
(2005).
Numerical simulations and predictive models of undrained penetration in soft soils.
Doctoral dissertation,
Texas A&M University.
Texas A&M University. Available electronically from
http : / /hdl .handle .net /1969 .1 /2555.
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| Files | Size | Format | View |
|---|---|---|---|
| etd-tamu-2005B-CVEN-Shi.pdf | 1.477Mb |
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Electronic Theses, Dissertations, and Records of Study (2002-present) [10425]
Electronic Theses, Dissertations, and Records of Study Collection
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