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Browsing by Author "Couto, Carlos"

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  • Evaluation of post-earthquake fire capacity of a reinforced concrete one bay plane frame under ISO fire exposure
    Publication . Vitorino, Hugo; Rodrigues, Hugo; Couto, Carlos
    Post-earthquake fires may appear after a large earthquake and its effects on urban areas can be even worse that the effects of the earthquake itself. The aim of the present work is to define a methodology to evaluate the consequences of the damage introduced by the seismic events on the fire resistance of reinforced concrete frames. It was performed several numerical analyses in reinforce concrete frames using the program SAFIR, considering the thermal and mechanical analysis of the structure. The variables in the analysis were the type of damage in the frames and the number of fire frontiers in the columns. The thermal analysis was performed using the standard fire curve ISO 834. The results show that the damage imposed by earthquake on reinforced concrete frames reduces the fire resistance of the frames. The time until collapse of the frames exposed to fire where was considered the most severe damage was about 2 h lower when compared to the frames without damage exposed to fire.
    2020-02-01Journal article Restricted access Show more
  • Evaluation of post-earthquake fire capacity of reinforced concrete elements
    Publication . Vitorino, Hugo; Rodrigues, Hugo; Couto, Carlos
    Large earthquakes may cause a chain of events, and one of which can be fire after an earthquake. The effects of fire after earthquake on urban areas can be even worse than the effects of the earthquake itself. Buildings are not adequately designed for fire after an earthquake since most standards ignore that possibility. The aim of the work is to evaluate the consequences of the damage introduced due to the seismic events on the fire resistance of reinforced concrete elements. Several numerical analyses were performed to reinforce concrete elements using the program SAFIR, considering the thermal and mechanical analysis of the structure. The main variables in the analysis were the type of damage in the elements and the type of loads. The thermal analysis was performed using the standard fire curve ISO 834. The results show that the damage imposed by earthquake on reinforced concrete structures reduces the fire resistance, especially if the cover of the elements is removed and the reinforcement is exposed to fire.
    2020-01Journal article Restricted access Show more