Toshiyuki ABE

Rigid Plastic FEM Analyses of Centrifuge Model Tests and Considerations on Inversed Soil Constants

Satoru OHTSUKA

Ultimate bearing capacity of ground is affected by the internal frictional angle of soil. The internal frictional angle is well known to vary depending on anisotropy, stress level, and strain softening. A setup of internal frictional angle is very difficult and is left for an important subject in geotechnical engineering. This study investigated the setup procedure of internal frictional angle for sandy soil through inverse analyses of centrifuge model tests. The following conclusions were obtained.
(1) Inverse analyses of centrifuge model tests for circular and strip foundations were conducted. Obtained soil constants were considered in comparison with material property of Toyoura sand.
(2) Numerical simulations with inversed soil constants well matched with the centrifuge model tests of (1)multi-layered ground of Toyoura sand and clayey soils and (2)three-dimensional foundations.
(3) Correlation coefficient for internal frictional angle was proposed based on the discussion of inversed soil constants.