NEHRP Clearinghouse
- Title
- Liquefaction Induced by Cyclic Loading.
- File
- PB82235508.pdf
- Author(s)
- Castro, G.; Enos, J. L.; France, J. W.; Poulos, S. J.
- Source
- National Science Foundation, Washington, DC., March 1982, 358 p.
- Abstract
- The results of a study of liquefaction induced by cyclic loading are presented. Liquefaction and cyclic mobility are defined and compared with published definitions. The steady state of deformation is described and its relationship to liquefaction is discussed. The results of comprehensive laboratory triaxial testing programs on two sands are supplied. The test data demonstrate that, for a given soil, the steady state line is independent of stress history, and the magnitude of cyclic loading required to trigger liquefaction is a function of static shear stress and number of load cycles. The steady state lines for the two sands tested are compared to steady state lines for a variety of other sands. General trends are recorded for variation of steady state lines in grain size distribution and in grain angularity. A procedure for practical application of steady state concepts to geotechnical engineering is recommended.
- Keywords
- Triaxial tests; Earthquake engineering; Shear stress; Liquefaction (Soils); Cyclic loads; Soil dynamics; Grain size; Sands; Earthquakes