Use of micro-pile inclusions to enhance foundation rocking isolation

Marianna Loli, George Gazetas, Jonathan Knappett, Ioannis Anastasopoulos

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A preceding experimental study carried out at the University of Dundee, as well as independent experimental and numerical research results, have shown the improved seismic performance of rocking shallow foundations in comparison to conventional, conservatively designed foundations. By properly reducing the size of the footing, rocking behavior due to seismic loading can occur about the footing base. It has been shown that rocking foundations can reduce seismic ductility demand on bridge columns and improve bridge performance so much so as to enable them to safely resist very strong seismic motions which lead to collapse of alternative conventional systems. Yet, key concern is the potential for significant settlement accumulation, especially in relatively poor soil conditions. Therefore, current research objectives focus on exploring possible innovative foundation systems that will optimize the seismic performance of rocking foundations. Centrifuge model testing and 3D numerical modelling was employed to investigate the performance of various hybrid foundation systems. This paper presents preliminary results for one of the investigated alternatives: a rocking-isolated footing standing on top of soil reinforced with a grid of micro-pile inclusions.
Original languageEnglish
Title of host publicationProceedings of the 1st International Conference on Natural Hazards and Infrastructure: Protection, Design, Rehabilitation (ICONHIC 2016), Chania, Greece
Publication statusPublished - 2016

Keywords

  • Centrifuge Modeling
  • Seismic Design
  • Nonlinear Response

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  • Research Output

    • 1 Conference contribution

    Variability of small scale model reinforced concrete and implications for geotechnical centrifuge testing

    Knappett, J., Brown, M., Shields, L., Al-Defae, A. H. & Loli, M., 24 Oct 2018, Physical Modelling in Geotechnics: Proceedings of the 9th International Conference on Physical Modelling in Geotechnics (ICPMG 2018), July 17-20, 2018, London, United Kingdom. McNamara, A., Divall, S., Goodey, R., Taylor, N., Stallebrass, S. & Panchal, J. (eds.). 1 ed. CRC Press-Taylor & Francis Group, p. 241-246

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

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  • 1 Citation (Scopus)
    115 Downloads (Pure)

    Cite this

    Loli, M., Gazetas, G., Knappett, J., & Anastasopoulos, I. (2016). Use of micro-pile inclusions to enhance foundation rocking isolation. In Proceedings of the 1st International Conference on Natural Hazards and Infrastructure: Protection, Design, Rehabilitation (ICONHIC 2016), Chania, Greece