Improved practice of load bearing capability of soils

Geotechnical Design has traditionally been done using working stress design (WSD), a design approach in which a factor of safety is used to either magnify the applied loads or reduce the available resistance to ensure safety. In WSD, all the uncertainties are lumped in the factor of safety. Load and Resistance Factor Design (LRFD) is an approach in which the uncertainties related to the imposed loads are accounted for by magnifying these loads, while the uncertainties involved in reducing resistances are accounted for by reducing the resistances.

Geotechnical Design has traditionally been done using working stress design (WSD), a design approach in which a factor of safety is used to either magnify the applied loads or reduce the available resistance to ensure safety. In WSD, all the uncertainties are lumped in the factor of safety. Load and Resistance Factor Design (LRFD) is an approach in which the uncertainties related to the imposed loads are accounted for by magnifying these loads, while the uncertainties involved in reducing resistances are accounted for by reducing the resistances. Though this design framework has already been in use in structural design, Professor Rodrigo Salgado, and other researchers, have now begun contemplating this for geotechnical design. This line of research seeks to organize the LRFD approach for the various geotechnical structures and to determine the specific values to be used for load and resistance factors.