@article {Antao2012,
	title = {An upper bound-based solution for the shape factors of bearing capacity of footings under drained conditions using a parallelized mixed f.e. formulation with quadratic velocity fields},
	journal = {Computers and Geotechnics},
	volume = {41},
	year = {2012},
	note = {n/a},
	pages = {23-35},
	abstract = {<p>A strict upper-bound limit analysis finite element formulation is used to estimate shape factors s_gamma and s_q for determining the bearing capacity of shallow foundations using the classic bearing capacity formula. The finite element formulation uses a quadratic approximation for the velocity field, an extension of a previously published Augmented Lagrangian formulation with a linear velocity field, and was implemented for a parallel processing environment. Results from determining the limit loads under three-dimensional conditions are presented and compared with previously published data. The results obtained allow a strict upper-bound determination of the shape factors. Furthermore, a practical proposal for these factors is made and compared with other proposals made by other authors.</p>
},
	doi = {10.1016/j.compgeo.2011.11.003},
	author = {Ant{\~a}o, A. N. and Vicente da Silva, da Costa Guerra, Nuno M. and Delgado, R.}
}
