專家講座：On the Mechanics of Unsaturated Soils

主講人🤰🏽：納賽爾.哈裏裏-納加代 KHALILI-NAGHADEH NASSER

時間地點🆚👓：2017年10月11日（周三）13:00-14:30 海洋樓109報告廳

內容提要🧓🏿：The effective stress principle is one of most fundamental contributions to the field of continuum mechanics. It converts a multi–phase, multi–stress state porous medium to amechanically equivalent, single-phase, single-stress state continuum, thus allowing the application of the principles of continuum solid mechanics to fluid-filled deformable porous media. In this presentation, the principle of effective stress in unsaturated soils is discussed, and some of the major misunderstanding as to its application to mechanics of multi-phase media are highlighted. In particular, the validity of the relationship proposed by Khalili and Khabbaz for the determination of the effective stress parameter c in unsaturated soils is examined. It is shown that quantitative predictions of shear strength and volume change in unsaturated soils can be made using the effective stress concept. The uniqueness of the critical state line in the deviatoric stress – effective mean stress plane for saturated and unsaturated soils is also discussed, and the incremental form of the effective stress parameter is derived.

主講人簡介🧑🏽‍⚖️：澳大利亞新南威爾士大學(The University of New South Wales)🤦🏽，巖土工程專業教授和學術帶頭人(Professor and Head of Geotechnical Engineering)