Dynamic response of flexible square tunnels: centrifuge testing and validation of existing design methodologies
A series of dynamic centrifuge tests were performed on a flexible aluminium square tunnel model embedded in Hostun dry sand. The tests were carried out at the centrifuge facility of the University of Cambridge in order to further improve knowledge regarding the seismic response of rectangular embedd...
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Thomas Telford ICE Publishing
2015
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| Online Access: | https://eprints.nottingham.ac.uk/34819/ |
| _version_ | 1848794942644682752 |
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| author | Tsinidis, Grigorios Pitilakis, Kyriazis Madabhushi, Gopol Heron, Charles |
| author_facet | Tsinidis, Grigorios Pitilakis, Kyriazis Madabhushi, Gopol Heron, Charles |
| author_sort | Tsinidis, Grigorios |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | A series of dynamic centrifuge tests were performed on a flexible aluminium square tunnel model embedded in Hostun dry sand. The tests were carried out at the centrifuge facility of the University of Cambridge in order to further improve knowledge regarding the seismic response of rectangular embedded structures and to calibrate currently available design methods. The soil–tunnel system response was recorded with an extensive instrumentation array, comprising miniature accelerometers, pressure cells and position sensors in addition to strain gauges, which recorded the tunnel lining internal forces. Tests were numerically analysed by means of full dynamic time history analysis of the coupled soil–tunnel system. Numerical predictions were compared to the experimental data to validate the effectiveness of the numerical modelling. The interpretation of both experimental and numerical results revealed, among other findings: (a) a rocking response of the model tunnel in addition to racking; (b) residual earth pressures on the tunnel side walls; and (c) residual internal forces after shaking, which are amplified with the tunnel's flexibility. Finally, the calibrated numerical models were used to validate the accuracy of simplified design methods used in engineering practice. |
| first_indexed | 2025-11-14T19:24:13Z |
| format | Article |
| id | nottingham-34819 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:24:13Z |
| publishDate | 2015 |
| publisher | Thomas Telford ICE Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-348192020-05-04T17:05:33Z https://eprints.nottingham.ac.uk/34819/ Dynamic response of flexible square tunnels: centrifuge testing and validation of existing design methodologies Tsinidis, Grigorios Pitilakis, Kyriazis Madabhushi, Gopol Heron, Charles A series of dynamic centrifuge tests were performed on a flexible aluminium square tunnel model embedded in Hostun dry sand. The tests were carried out at the centrifuge facility of the University of Cambridge in order to further improve knowledge regarding the seismic response of rectangular embedded structures and to calibrate currently available design methods. The soil–tunnel system response was recorded with an extensive instrumentation array, comprising miniature accelerometers, pressure cells and position sensors in addition to strain gauges, which recorded the tunnel lining internal forces. Tests were numerically analysed by means of full dynamic time history analysis of the coupled soil–tunnel system. Numerical predictions were compared to the experimental data to validate the effectiveness of the numerical modelling. The interpretation of both experimental and numerical results revealed, among other findings: (a) a rocking response of the model tunnel in addition to racking; (b) residual earth pressures on the tunnel side walls; and (c) residual internal forces after shaking, which are amplified with the tunnel's flexibility. Finally, the calibrated numerical models were used to validate the accuracy of simplified design methods used in engineering practice. Thomas Telford ICE Publishing 2015-05-01 Article PeerReviewed Tsinidis, Grigorios, Pitilakis, Kyriazis, Madabhushi, Gopol and Heron, Charles (2015) Dynamic response of flexible square tunnels: centrifuge testing and validation of existing design methodologies. Geotechnique, 65 (5). pp. 401-417. ISSN 1751-7656 centrifuge modelling earthquakes numerical modelling soil/structure interaction tunnels tunnelling http://www.icevirtuallibrary.com/doi/10.1680/geot.SIP.15.P.004 doi:10.1680/geot.SIP.15.P.004 doi:10.1680/geot.SIP.15.P.004 |
| spellingShingle | centrifuge modelling earthquakes numerical modelling soil/structure interaction tunnels tunnelling Tsinidis, Grigorios Pitilakis, Kyriazis Madabhushi, Gopol Heron, Charles Dynamic response of flexible square tunnels: centrifuge testing and validation of existing design methodologies |
| title | Dynamic response of flexible square tunnels: centrifuge testing and validation of existing design methodologies |
| title_full | Dynamic response of flexible square tunnels: centrifuge testing and validation of existing design methodologies |
| title_fullStr | Dynamic response of flexible square tunnels: centrifuge testing and validation of existing design methodologies |
| title_full_unstemmed | Dynamic response of flexible square tunnels: centrifuge testing and validation of existing design methodologies |
| title_short | Dynamic response of flexible square tunnels: centrifuge testing and validation of existing design methodologies |
| title_sort | dynamic response of flexible square tunnels: centrifuge testing and validation of existing design methodologies |
| topic | centrifuge modelling earthquakes numerical modelling soil/structure interaction tunnels tunnelling |
| url | https://eprints.nottingham.ac.uk/34819/ https://eprints.nottingham.ac.uk/34819/ https://eprints.nottingham.ac.uk/34819/ |