NEHRP Clearinghouse
- Title
- Undrained Cyclic Triaxial Testing of Gravels - The Effect of Membrane Compliance.
- File
- PB88173257.pdf
- Author(s)
- Evans, M. D.; Seed, H. B.
- Source
- National Science Foundation, Washington, DC., July 1987, 437 p.
- Identifying Number(s)
- UCB/EERC-87/08
- Abstract
- The research attempted to define the magnitude of the effect of membrane penetration and compliance on the undrained cyclic loading resistance of various gravels so that this factor can be taken into account in assessing the undrained strength loss which could occur in gravelly soils. A comparative study is made between the results of tests performed on gravel specimens tested in a conventional compliant system and comparable gravel specimens tested in a specially prepared non-compliant or low-compliance system. Special test conditions, including isotropic and anisotropic consolidation, the use of various numbers and thicknesses of confining membranes, and construction of a thin annular sand shell around the outside of the gravel specimens, were imposed on several test groups to investigate their effects on the relationships between the cyclic loading resistance curves and the pore pressure ratio curves for sluiced and unsluiced gravel specimens.
- Keywords
- ; Consolidation; Gravel; Thickness; Triaxial tests; Mechanical properties; Membranes; Pore pressure; Cyclic loads; Penetration; Hydrostatic tests; Modulus of elasticity; Tests; Earthquakes