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).
To deposit your AAM, please adhere to the following conditions:
SECED allows authors to deposit their AAM under the Creative Commons Attribution Non-commercial International Licence 4.0 (CC BY-NC 4.0). The deposit must clearly state that the AAM is deposited under this licence and that any reuse is allowed in accordance with the terms outlined by the licence. To reuse the AAM for commercial purposes, permission must be sought by contacting seced@ice.org.uk. For the sake of clarity, commercial usage would be considered as, but not limited to:
Should you have any questions about our licensing policies, please contact seced@ice.org.uk.

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This paper presents the effect of soil-structure interaction (SSI) on seismic inelastic displacement ratios of SDOF systems. Existing methods used in the past assumes the soil is rigid. A simplified equivalent fixed-base method is proposed herein to achieve more accurate estimations for the inelastic displacement demand of a structure.
A well-defined degrading model was used to conduct the dynamic analyses. A total of 300 earthquake motions recorded on firm sites, including recent ones from Japan and New Zealand, with magnitudes greater than 5 and peak ground acceleration (PGA) values greater than 0.08g, were selected and scaled to the same hazard level. These earthquake records were applied on five reinforced concrete (RC) columns that were chosen among 255 tested columns based on their beam-column element parameters reported by the Pacific Earthquake Engineering Research Centre. A total of 384,000 dynamic analyses were conducted to derive the required inelastic ratios. Different strength reduction factors and foundation aspect ratios h/r values were assumed for a range of NEHRP soil types C and D properties in the study. The results show that inelastic displacements are relatively greater for slender columns, particularly for high foundation aspect ratios. The large collected data was used to derive mathematical expressions for inelastic displacement ratios, suitable for use in performance-based seismic evaluation in a design office. A new rigorous approach based on fuzzy logic techniques is derived to properly account for the large uncertainty present in the system. The performance evaluation of this approach is evaluated using a series of independent data sets. Accurate results were predicted using the new fuzzy logic model.