Recent natural and anthropic disasters have aroused the interest of the scientific and governmental community in seeking more efficient and effective risk mitigation strategies. Index-based approaches have received particular attention in the field of disaster risk because of their extraordinary capacity to synthesise and spatially contextualise vulnerability. Motivated by the massive impacts of earthquakes, the seismic risk field has gained popularity over the last few decades. However, little attention has been paid so far to a potentially highly impacting phenomenon: post-earthquake fires. Historical records have shown that fire ignitions triggered by earthquakes present a significant likelihood of ending up in massively destructive urban fires whose consequences are even more dreadful than those of the earthquake itself. This paper aims to contribute to the body of knowledge in the field of post-earthquake fires by presenting a scenario-based analysis in the Historic City Centre of Leiria. Firstly, two seismic vulnerability index methodologies are applied to obtain post-earthquake damage scenarios. Then, a risk matrix is used to identify the buildings that are more prone to suffer post-earthquake fire ignitions. Finally, fire spreading and suppression conditions are examined and discussed through a detailed analysis where fire risk outputs, damages, and the accessibility conditions of the area are combined to obtain an integrated post-earthquake fire analysis. The results show that for a seismic event of intensity $I_{EMS-98}$ = VIII, 33% of the total surveyed buildings could present a moderate or high risk of post-earthquake fire ignition.

最近的自然和人类灾难引起了科学界和政府界对寻求更有效，更有效的风险缓解策略的兴趣。基于索引的方法因其综合和空间关联脆弱性的非凡能力而在灾害风险领域受到了特别关注。在地震的巨大影响的推动下，地震风险领域在过去的几十年中变得越来越流行。但是，到目前为止，很少关注潜在的高度影响现象：地震后火灾。历史记录表明，地震引发的火灾极有可能最终导致大规模破坏性的城市大火，其后果甚至比地震本身更可怕。本文旨在通过在莱里亚历史城区中心进行基于情景的分析，为地震后火灾领域的知识体系做出贡献。首先，采用两种地震易损性指标方法来获得地震后的破坏情景。然后，使用风险矩阵来确定更容易遭受地震后火灾着火的建筑物。最后，通过详细分析来检查和讨论火灾蔓延和扑灭条件，将火灾风险输出，破坏和该区域的可及性条件结合起来，以获得综合的地震后火灾分析。结果表明，对于一个地震烈度事件 首先，采用两种地震易损性指标方法来获得地震后的破坏情景。然后，使用风险矩阵来识别更容易遭受地震后火灾着火的建筑物。最后，通过详细分析来检查和讨论火灾蔓延和扑灭条件，将火灾风险输出，破坏和该区域的可及性条件结合起来，以获得综合的地震后火灾分析。结果表明，对于一个地震烈度事件 首先，采用两种地震易损性指标方法来获得地震后的破坏情景。然后，使用风险矩阵来识别更容易遭受地震后火灾着火的建筑物。最后，通过详细分析来检查和讨论火灾蔓延和扑灭条件，将火灾风险输出，破坏和该区域的可及性条件结合起来，以获得综合的地震后火灾分析。结果表明，对于一个地震烈度事件 通过详细分析来研究和讨论火灾的蔓延和抑制条件，将火灾风险输出，破坏和该区域的可及性条件结合起来，以获得综合的地震后火灾分析。结果表明，对于一个地震烈度事件 通过详细分析来检查和讨论火灾的蔓延和抑制条件，将火灾风险输出，破坏和该区域的可及性条件结合起来，以获得综合的地震后火灾分析。结果表明，对于一个地震烈度事件${\mathrm{一世}}_{E\mathrm{中号}\mathrm{小号}-98}$ = VIII，在被调查建筑物总数中，有33％可能会出现中度或高度的地震后着火危险。