STATE PRESSURE INDEX FOR MODELING SAND BEHAVIOR
Efforts to model sand behavior within a critical-state soil mechanics framework would benefit from a state variable relating the current void ratio and mean pressure of the soil to its void ratio and mean pressure at the critical state. In this paper, the authors propose a state pressure index, I-sub-p, which is defined as the ratio of the current mean pressure to the mean pressure at the critical state corresponding to the current void ratio. Using this state pressure index, a bounding surface hypoplasticity model for sand is modified so that the phase transformation and failure stress ratios both depend on I-sub-p and merge into the critical-state stress ratio at failure. The I-sub-p dependency introduced enables use of a single set of model constants in modeling sand behavior for various initial confining pressures and densities under undrained/drained conditions. Dilatancy and strain softening and hardening are simulated for loose and dense sands. Simulations from the modified model are compared to results of lab tests of drained/undrained triaxial compression.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/3519342
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Corporate Authors:
American Society of Civil Engineers
1801 Alexander Bell Drive
Reston, VA United States 20191-4400 -
Authors:
- Wang, Z-L
- DAFALIAS, Y F
- Li, X-S
- Makdisi, F I
- Publication Date: 2002-6
Language
- English
Media Info
- Features: Appendices; Figures; References; Tables;
- Pagination: p. 511-519
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Serial:
- Journal of Geotechnical and Geoenvironmental Engineering
- Volume: 128
- Issue Number: 6
- Publisher: American Society of Civil Engineers
- ISSN: 1090-0241
- Serial URL: http://ojps.aip.org/gto
Subject/Index Terms
- TRT Terms: Foundation engineering; Foundation soils; Geotechnical engineering; Sand; Sandy soils; Soil mechanics; Soil science; Soil tests
- Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;
Filing Info
- Accession Number: 00925084
- Record Type: Publication
- Files: TRIS
- Created Date: May 30 2002 12:00AM