Society for Earthquake and Civil Engineering Dynamics
SECED 2015 was a two-day conference on Earthquake and Civil Engineering Dynamics that took place on 9-10th July 2015 at Homerton College, Cambridge.
This was the first major conference to be held in the UK on this topic since SECED hosted the 2002 European Conference on Earthquake Engineering in London.
The conference brought together experts from a broad range of disciplines, including structural engineering, nuclear engineering, seismology, geology, geotechnical engineering, urban development, social sciences, business and insurance; all focused on risk, mitigation and recovery.
SECED 2015 featured the following keynote speakers (affiliations correct at the time of the conference):
SECED allows the self-archiving of the Author Accepted Manuscripts (AAM) from the SECED 2015 Conference. This means that all authors can make their conference paper available via a green open access route. The full text of your paper may become visible within your personal website, your institutional repository, a subject repository or a scholarly collaboration network signed up to the voluntary STM sharing principles. It may also be shared with interested individuals, for teaching and training purposes at your own institution and for grant applications (please refer to the terms of your own institution to ensure full compliance).
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A series of dynamic centrifuge tests performed at the geotechnical centrifuge facility of IFSTTAR in Nantes, on rectangular model tunnels embedded in dry sand is presented. The effect of salient model parameters such as soil-to-tunnel relative flexibility, soil-structure interface properties and characteristics of the input motion is explored. Representative test cases are modelled by means of rigorous finite-element configurations of the coupled soil-tunnel system, accounting for the non-linear soil response and soil-tunnel interface behaviour under seismic loading. Numerical results are compared with experimental data in terms of soil and tunnel acceleration and tunnel deformations. The validated numerical models are then used to evaluate the accuracy of simplified analysis methods. Experimental and numerical results reported herein indicate among others: (i) a rocking deformation mode coupled with a racking distortion of tunnels during seismic shaking and (ii) a significant effect of the soil-tunnel interface properties and soil non-linear behaviour on the tunnel response. Simplified seismic design methods may, under certain conditions, provide a reasonable framework for the analysis at least at a preliminary stage.