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Susceptibility of Shallow Foundation to Rocking and Sliding Movements During Seismic Loading

  • Charles HeronEmail author
  • Stuart Haigh
  • Gopal Madabhushi
Chapter
Part of the Geotechnical, Geological and Earthquake Engineering book series (GGEE, volume 26)

Abstract

Current design codes prevent the rocking and sliding of shallow foundations during seismic loading despite much research indicating the beneficial nature of allowing such movements. The primary benefit is the partial isolation of the structure from the soil beneath and subsequently the reduced ductility demands on the superstructure, saving money and reducing the risk of collapse. However, further research is required in order to be able to fully model and predict the behaviour of the soil-foundation interface when sliding and rocking is permitted. The results presented in this chapter examine how several different parameters including structural stiffness, aspect ratio, soil relative density and earthquake magnitude affect the level of rotation and sliding experienced by the foundation. Six centrifuge tests were performed to examine how these parameters affected the response of the structure and high speed photography was used to track the movements of the foundation precisely. It was found that structures with a high centre of gravity slid more than structures with a low centre of gravity. Also, stiff structures were found to rotate more than flexible structures and structures located on dense sand rotate more than those located on loose sand.

Keywords

Particle Image Velocimetry Flexible Structure Stiff Structure Input Motion Loose Sand 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The research leading to these results has received funding from the European Community’s Seventh Framework Programme [FP7/2007–2013] under grant agreement no 227887 [SERIES]. The support of the other members of JRA3 in SERIES is acknowledged.

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  1. 1.Department of Engineering, Schofield CentreUniversity of CambridgeCambridgeUK

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