NOTES
Non-stationary respOnse of spaTially Extended Structures
| Coordinatore | THE PROVOST, FELLOWS, FOUNDATION SCHOLARS & THE OTHER MEMBERS OF BOARD OF THE COLLEGE OF THE HOLY & UNDIVIDED TRINITY OF QUEEN ELIZABETH NEAR DUBLIN
Organization address
address: College Green - contact info |
| Nazionalità Coordinatore | Ireland [IE] |
| Totale costo | 403˙231 € |
| EC contributo | 403˙231 € |
| Programma | FP7-PEOPLE
Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) |
| Code Call | FP7-PEOPLE-IAPP-2008 |
| Funding Scheme | MC-IAPP |
| Anno di inizio | 2009 |
| Periodo (anno-mese-giorno) | 2009-03-01 - 2013-02-28 |
Partecipanti
| # | ||||
|---|---|---|---|---|
| 1 |
THE PROVOST, FELLOWS, FOUNDATION SCHOLARS & THE OTHER MEMBERS OF BOARD OF THE COLLEGE OF THE HOLY & UNDIVIDED TRINITY OF QUEEN ELIZABETH NEAR DUBLIN
Organization address
address: College Green - contact info |
IE (DUBLIN) | coordinator | 206˙833.00 |
| 2 |
Plaxis bv
Organization address
address: Delftechpark 53 contact info |
NL (Delft) | participant | 196˙398.00 |
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Obiettivo del progetto (Objective)
'Failures of long span highway structures in Northridge earthquake (1994) and spatially extended transmission towers systems in Kobe earthquakes (1995) have clearly shown the significance of non-stationary effects of ground motions and its importance in earthquake geotechnical engineering. Similar detrimental vibration effects have been witnessed in vehicle induced ground transmission of vibrations from high speed railway tracks, both underground and at surface. There has been a rapid growth of infrastructure and transportation systems (like tunnels, pipelines etc.) in Europe over the last few decades, which are spatially extended structures. The non-stationary effects of vibrations are threatening to the safety of these systems making them vulnerable to vibrations transmitted through soil medium. The recent European design codes require these systems to be analysed for safety against spatially varying vibration effects, which will be mandatory in near future. The Structural Dynamics & Vibrations Group (SDVG) in Trinity College Dublin, Ireland has excellent research background on non-stationary vibration analysis with international reputation, and PLAXIS BV an SME in The Netherlands is a world leader in the field of finite element modelling in geotechnical engineering with emphasis on soil-structure interaction. The PLAXIS BV is a European technical IT company which has a range of user friendly technical software products for the infrastructure industry worldwide. This project provides a framework to bring the two partners (from academia and industry) together with complementary expertise, to transfer the knowledge for mutual benefit and development. It will contribute to the knowledge base development of a European SME with global market, innovating new products. It will also foster the FP7 targets of Sustainable Transport with safety and security under to man-made and naturally induced vibrations; applying the tools developed using Information Science & Technology.'
Introduzione (Teaser)
Studying non-stationary seismic responses
Descrizione progetto (Article)
Seismic waves are causing non-stationary effects that threaten the safety of transport infrastructure in Europe. Although vibration intensity and frequency are known to be inherently non-stationary, studies so far have mostly used stationary random vibration theory.
The 'Non-stationary response of spatially extended structures' (http://notesproject.webs.com/ (NOTES)) project focused on studying the effects of spatially varying earthquake ground motions on large structures such as bridges or tunnels. It also analysed the soil non-stationary response induced by vehicle vibrations.
Project members from Ireland who are experts in signal processing and wavelet-based non-stationary response analysis collaborated with a leading Netherlands-based software company regarding geotechnical products. NOTES allowed the latter to take advantage of the latest developments in vibration analysis and signal processing techniques. To this end, two training courses on MatLab code and wavelet processing took place, focusing on seismic signal spectral characterisation and vehicle dynamics.
Academia researchers were exposed to industry practices of finite element modelling of spatially extended structures. By using the company software, they were trained on analysing structure seismic responses.
Furthermore, algorithms for generating multi-point spatially correlated excitations were developed. This helped to investigate the non-stationary responses of large structures. Another activity was to develop a finite element model for the non-stationary response propagating in soil that is induced by vehicle vibrations.
An important project achievement was the software plug-in development for seismic- and vehicle-induced vibrations.
NOTES succeeded in creating a pool of highly skilled and experienced researchers with the knowledge required to create better analytical and computational techniques for analysing geotechnical systems. The project also resulted in numerous publications.