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Susceptibility of shallow foundation to rocking and sliding movements during seismic loading

Heron, Charles; Haigh, Stuart; Madabhushi, Gopal

Authors

Charles Heron

Stuart Haigh

Gopal Madabhushi



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.

Publication Date Jan 1, 2014
Electronic ISSN 1573-6059
Peer Reviewed Peer Reviewed
Volume 26
Issue 26
Series Title Geotechnical, geological and earthquake engineering
Book Title Seismic evaluation and rehabilitation of structures
ISBN 978-3-319-00457-0
APA6 Citation Heron, C., Haigh, S., & Madabhushi, G. (2014). Susceptibility of shallow foundation to rocking and sliding movements during seismic loading. In Seismic evaluation and rehabilitation of structuresSpringer. doi:10.1007/978-3-319-00458-7_23
DOI https://doi.org/10.1007/978-3-319-00458-7_23
Keywords Soil-Structure-Interaction, Sliding, Rotation, Settlement, Energy
Publisher URL http://link.springer.com/chapter/10.1007%2F978-3-319-00458-7_23
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
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