H2020Индивидуална стипендия2021–2024

RFFD · Recentering Friction Floor Dissipater for Resilient-based Design of Steel Structures

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2021-10-01 → 2024-03-29
Финансиране от ЕС: 191 149 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Ново устройство за стоманени сгради (RFFD) поема енергията от земетресенията, за да намали структурните повреди. Това помага за ограничаване на икономическите загуби и броя на жертвите при природни бедствия в Европа.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Recentering Friction Floor Dissipater for Resilient-based Design of Steel Structures

The current built environment, especially in southern European countries, is sensitive to natural hazards, such as earthquakes. As stated by the Press Release of the European Parliament, earthquakes that occurred between August 2016 and January 2017 in Italy led to 333 fatalities, with over 30,000 people displaced and in need of financial assistance. The cost of the earthquake was estimated to be approximately €21.9 billion (1% of Italy’s GDP), and Italy received €1.2 billion of EU aid. Since earthquakes will continue to occur, it is necessary to develop more efficient solutions to improve the resilience of European countries in the aftermath of natural disasters. Within such a context, the goal of the proposed research is to develop a novel steel building system device, named Recentring Friction Floor Dissipater (RFFD), which can minimize damage and earthquake-induced economic losses in enhanced steel concentrically braced frame buildings while also providing recentring. The novel concept behind the RFFD is that inelastic structural displacements are absorbed by the device between the diaphragm and the lateral load resisting system, rather than only relying on this last as traditionally occurs. To achieve such an ambitious goal, the following research objectives are proposed: O1. Simulation-based design of RFFD for inertial force control: The RFFD will be developed by leveraging optimally selected materials for friction applications and durability. O2. Component-level experimental validation and development of macro-model simulation tools: The macro-scale force-deformation response of the proposed device will be characterized through large-scale cyclic testing coupled with ageing testing (including accelerated corrosion). O3. System-level experimental validation: Large scale hybrid testing of an 8-storey enhanced steel CBF will be conducted for benchmarking the system performance and the associated simulation models. O4. Collapse simulations of enhanced CBF buildings under uncertainty: Rigorous earthquake-induced time dependent nonlinear collapse simulations of enhanced versus conventional CBF buildings will be conducted by considering the epistemic and aleatory uncertainties due to friction forces and the ground motion hazard, respectively. O5. Development of graphics-based design tool for enhanced life-cycle performance: A web-based tool will be developed that integrates multiple structural and non-structural response quantities into a graphical format that satisfy different seismic performance objectives based on rigorous earthquake-induced loss assessment.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

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.

Оригинален текст от CORDIS (на английски).

Участници

ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE · LausanneКоординаторШвейцария