Description du projet
Une dissipation innovante par le sol renforce la résistance des bâtiments aux tremblements de terre
Les tremblements de terre peuvent donner l’impression qu’un géant s’est emparé de votre corps et le secoue d’avant en arrière. Il est essentiel pour la sécurité que les bâtiments résistent à ces forces latérales tout en conservant leur élasticité pour éviter les ruptures. Les cadres à contreventement concentrique (CBF) en acier, dans lesquels les contreventements diagonaux sont situés dans le plan vertical du cadre, sont couramment utilisés à cette fin. Cependant, leur comportement inélastique asymétrique complexe pose des problèmes. Avec le soutien du programme Actions Marie Skłodowska-Curie, le projet RFFD développe un dispositif innovant de dissipation horizontale pour les planchers des bâtiments à CBF en acier à l’aide d’une conception informatique basée sur la physique et la simulation.
Objectif
In regions of moderate and high seismicity such as Europe, steel concentrically braced frames (CBFs) are considered a cost-effective lateral force resisting system to withstand seismic and/or wind loading. Comprehensive building-specific economic loss assessment suggests that the expected annual losses of steel CBF buildings are mainly associated with repairs of acceleration-sensitive building components, which in turn results into building functionality disruption after an earthquake. Higher building vibration mode effects and the complex asymmetric inelastic behaviour of steel braces make it challenging to prevent soft-storey mechanisms that potentially lead to global collapse even in capacity-designed steel CBF buildings. The proposed project aims to address the aforementioned issues by developing an innovative dissipation device, named Recentring Friction Floor Dissipator (RFFD) to control the earthquake-induced vibration and demands in steel CBF buildings through its diaphragm response instead of the lateral load resisting system that is traditionally attempted. This will minimize the variability of the inertia force demands along with the earthquake-induced life-cycle costs. The device realization will be achieved through physics-based computational simulation-based design validated to full-scale testing. Macro-models will be developed to facilitate, for the first time, time-dependent nonlinear building simulations that will be benchmarked to a landmark system-level experiment. A graphics-based design tool will be developed that will combine in a single format economic loss metrics with multiple building performance indicators to aid decision-making for enhanced building service life in seismic regions.
After having acquired extended experience in the field of earthquake engineering in New Zealand and Japan, the applicant wants to reintegrate to Europe to consolidate his career in a leading European University.
Champ scientifique
- natural sciencesmathematicsapplied mathematicsdynamical systems
- social scienceseconomics and businessbusiness and managementbusiness models
- engineering and technologycivil engineeringstructural engineeringearthquake engineering
- natural sciencescomputer and information sciencescomputational sciencemultiphysics
- natural sciencescomputer and information sciencessoftwaresoftware applicationssimulation software
Mots‑clés
Programme(s)
Régime de financement
MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)Coordinateur
1015 Lausanne
Suisse