The dynamic behaviour of pile foundations in seismically liquefiable soils: failure mechanisms, analysis, requalification

Rohollah Rostami*, Slobodan B. Mickovski, Nicholas Hytiris, Subhamoy Bhattacharya

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)peer-review

Abstract

This chapter presents a concise overview of the mechanics of failure, analysis and requalification procedures of pile foundations in liquefiable soils during earthquakes. The aim is to build a strong conceptual and technical interpretation in order to gain insight into the mechanisms governing the failure of structures in liquefaction and specify effective requalification techniques. In this regard, several most common failure mechanisms of piles during seismic liquefaction such as bending (flexural), buckling instability and dynamic failure of the pile are introduced. Furthermore, the dynamic response commentary is provided by critically reviewing experimental investigations carried out using a shaking table and centrifuge modelling procedures. The emphasis is placed on delineating the concept of seismic design loads and important aspects of the dynamic behaviour of piles in liquefiable soils. In this context, using Winkler foundation approach with the proposed p–y curves and finite-element analyses in conjunction with numerical analysis methods, are outlined. Moreover, the feasibility of successful remediation techniques for earthquake resistance is briefly reviewed in light of the pile behaviour and failure. Finally, practical recommendations for achieving enhanced resistance of the seismic response of pile foundation in liquefiable soil are provided.
Original languageEnglish
Title of host publicationEarthquakes
EditorsWalter Salazar
PublisherIntechOpen
Number of pages30
ISBN (Print)9781839624292
Publication statusPublished - Mar 2021

Keywords

  • civil engineering
  • earthquakes
  • geotechnical engineering

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