Soil Motion Computations by Characteristics Method

by Victor L. Streeter, (F.ASCE), Prof. of Hydr.; Univ. of Michigan, Ann Arbor, MI,
E. Benjamin Wylie, (M.ASCE), Prof. of Civ. Engrg.; Univ. of Michigan, Ann Arbor, MI,
Frank E. Richart, Jr., (F.ASCE), Prof. of Civ. Engrg.; Univ. of Michigan, Ann Arbor, MI,

Serial Information: Journal of the Geotechnical Engineering Division, 1974, Vol. 100, Issue 3, Pg. 247-263

Document Type: Journal Paper

Abstract: In this study the characteristics method is applied to wave propagation corresponding to earthquake intensities in models of unsaturated and saturated soils. Shear waves developed in linear, or in strain-softening materials, and pressure waves in viscoelastic materials are considered. One-dimensional transmissions in unsaturated layered systems are treated first, then the method is applied to two-dimensional simulations by the lattice work approach. The latter method may also be extended to treat three-dimensional problems. Pore pressure transients are investigated in a one-dimensional approach based on Darcy's law. By prescribing reductions of void ratios as a function of time, zones of potential liquefaction may be identified and their movement traced. By use of a lattice work representation, transient pore pressure within the upstream portion of an earth dam are investigated.

Subject Headings: Shear waves | Wave pressure | Transient response | Model analysis | Saturated soils | Soil properties | Lattices | Pore pressure

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