Multi-Directional Irregular Loading Tests on Sand

by Kenji Ishihara,
Hideo Nagase,

Document Type: Proceeding Paper

Part of: Advances in the Art of Testing Soils Under Cyclic Conditions


In order to clarify the effects of irregular and multi-directional nature of load application on soil deposits during earthquakes, multiple series of laboratory tests were conducted on samples of Fuji river sand with three different densities by applying six sets of irregular shear stress from two mutually perpendicular directions in the simple shear test device. On the basis of the test results, values of coefficients allowing for the effects of irregularity and multiplicity in load direction were proposed to facilitate evaluation of soil strength in seismic loading conditions from a knowledge of the cyclic strength that can be readily obtained by the conventional cyclic triaxial test.

Subject Headings: Triaxial tests | Soil tests | Seismic tests | Triaxial loads | Load factors | Sandy soils | Soil strength | Soil stress

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