Abstract
This work proposes a mathematical approach to derive the displacement pattern of pile groups subjected to vertical eccentric load. To this end, a new macro-element is formulated in the framework of strain-hardening elasto-plasticity. The equations are developed by assuming an associated flow rule for the evaluation of the plastic deformations and an exponential relationship for the load-displacement curve of the group. The collapse domain is approximated by a parabolic equation while the yield surface has the same shape of the collapse surface and is scaled homothetically through a hardening function accounting for the past load history of the foundation. The evolution of this state variable is expressed by a pertinent hardening law. The proposed approach is validated against data from centrifuge experiments on pile groups embedded in clay.
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Acknowledgments
This work has been carried out under research project PRIN 2017 ‘A new macro-element model for pile groups under monotonic, cyclic and transient loadings’ funded by Italian Ministry of University and Research.
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Iodice, C., Iovino, M., Di Laora, R., de Sanctis, L., Mandolini, A. (2023). A Macro-element for Pile Groups Subjected to Vertical Eccentric Load. In: Ferrari, A., Rosone, M., Ziccarelli, M., Gottardi, G. (eds) Geotechnical Engineering in the Digital and Technological Innovation Era. CNRIG 2023. Springer Series in Geomechanics and Geoengineering. Springer, Cham. https://doi.org/10.1007/978-3-031-34761-0_26
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DOI: https://doi.org/10.1007/978-3-031-34761-0_26
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