ResFrameFireSeismic · Resilient steel frame against fire and seismic hazards

Resilient steel frame against fire and seismic hazards

Conventional seismic-resistant structures are designed to experience significant damage under moderate-to strong earthquakes and this results in socio-economic losses such as injuries, high repair costs and disruption of the building use or occupation. To address this issue, researchers have developed modern seismic-resilient frames that can avoid inelastic deformations (i.e. damage) in structural members. Fire is another type of loading, which can cause significant damage and collapse. Moreover, fire after strong earthquakes is also a highly probable catastrophic event as it has been seen after recent earthquakes (e.g. Indonesia 2009, Chile 2010). Despite the fact that the risk of fires is high after strong earthquakes, seismic resilient structural systems have not yet been studied against fire and fire after earthquake loading. This project studies the behaviour of modern seismic-resilient self-centering post-tensioned steel frames against fire loading and proposes modifications of their structural details so that, apart from seismic resilience, fire robustness can be also achieved. The project aims to develop, for the first time, an innovative steel frame characterized by the unique combination of minimal damage seismic behaviour and robustness against fire and post-earthquake fire loading. The objectives of the project are: 1. To experimentally assess the fire-resistance and the failure modes of undamaged and pre-damaged PT connections. 2. To develop high-fidelity numerical models for PT connections that can be used for non-linear thermal/structural analysis. 3. To simulate the thermal/structural response of PT connections at elevated temperatures and to define the appropriate structural detailing for fire resistant connections. 4. To propose fire design criteria and simplified models for PT connections with the goal of achieving fire resistant SC-MRFs. 5. To develop numerical models for SC-MRFs, which are appropriate for thermal/structural analysis, seismic simulations, and FAE simulations. 6. To propose practical fire and FAE design procedures for SC-MRFs in the context of Eurocodes 3 and 8.

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