Static stiffness of shallow, embedded and caisson foundations in non-homogeneous elastic soil layer

by Gabriele Boccieri1, Raffaele Cesaro2, Pietro Marveggio3, Luca Flessati4, Raffaele Di Laora5 and Riccardo Conti6 1Research Fellow, Department of Civil Engineering and Computer Science Engineering, Università degli Studi di Roma “Tor Vergata”, Rome, Italy. Email: [e-mail]. 2Research Fellow, Faculdade de Engenharia, Universidade do Porto, Porto, Portugal. Email: [e-mail]. 3Assistant Professor, Department of Civil and Environmental Engineering, Politecnico di Milano, Milano, Italy. Email: [e-mail]. 4Assistant Professor, Faculty of Civil Engineering and Geoscience, Delft University of Technology, Delft, The Netherlands. Email: [e-mail]. 5Associate Professor, Department of Engineering, Università della Campania ‘Luigi Vanvitelli’, 81031 Aversa, Italy. Email: [e-mail]. 6Associate Professor, Department of Civil Engineering and Computer Science Engineering, Università degli Studi di Roma “Tor Vergata”, Rome, Italy. Email: [e-mail].