ABSTRACT
Faced with seismic risk, to better understand and characterize the behaviour of soils, advanced geotechnical laboratory tests are necessary. These include, for example, torsional resonance tests. The American standard (ASTM D4015 – 15), which describes the process for carrying out these tests, points out the lack of interlaboratory tests to determine their accuracy. As part of the ASIRI+ project, a cross-test campaign was launched in France from the beginning of 2023 on two types of sandy materials (HN31 and a mixture of HN38, HN34, HN31, HN04). Three independent laboratories participated. The results of resonant column tests obtained are presented. The following evolutions are discussed: shear modulus vs distortion, damping vs distortion. Results are compared to empirical models.
