Static and cyclic rocking on sand: Centrifuge versus reduced-scale 1g experiments

P. Kokkali, I. Anastasopoulos, T. Abdoun, G. Gazetas

Research output: Contribution to journalArticle

Abstract

Shallow foundations supporting bridge piers, building frames, shear walls and monuments are often subjected to extreme lateral loading such as wind in offshore environments, or strong seismic shaking. Under such loading conditions, foundations may experience a host of non-linear phenomena: sliding on and uplifting from the supporting soil or even soil failure in the form of development of ultimate bearing capacity mechanisms. This type of response is accompanied by residual settlement and rotation of the supported structural system. Nevertheless, inelastic foundation  performance can provide potential benefits to the overall seismic integrity of the structure. Thanks to such non-linearities, energy dissipation at or below the foundation level may eventually limit the seismic demand on structural elements. Several theoretical and experimental studies have provided encouraging evidence to this effect. This paper has a dual objective: first, to study the behaviour of shallow foundations under vertical and lateral monotonic loading and under lateral slow cyclic loading of progressively increasing amplitude; second, to explore the differences in foundation response between reduced-scale 1g and centrifuge 50g model testing. Emphasis is placed on interpreting their discrepancies by unveiling the role of scale effects. The role of soil densification due to multiple loading cycles with uplifting is also highlighted.

Original languageEnglish (US)
Pages (from-to)865-880
Number of pages16
JournalGeotechnique
Volume64
Issue number11
DOIs
StatePublished - Jan 1 2014

Keywords

  • Bearing capacity
  • Centrifuge modelling
  • Footings/foundations
  • Settlement

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Earth and Planetary Sciences (miscellaneous)

Fingerprint Dive into the research topics of 'Static and cyclic rocking on sand: Centrifuge versus reduced-scale 1g experiments'. Together they form a unique fingerprint.

Cite this