Abstract Hospital emergency departments are highly important systems and treat injured people during earthquakes. It is essential that their functionality is maintained during or recovered immediately after a disastrous earthquake; this is referred to as seismic resilience. A systematic analysis of the involved components and their influence on the functionality are required to quantify the functionality and seismic resilience. A number of studies have analyzed emergency departments under normal operating conditions using various system analysis methods. However, there are few studies on the post-earthquake performance of such systems. To this end, we propose an evaluation framework based on the state tree method to quantify the component’s influences on the functionality and the seismic resilience from an engineering perspective. A typical emergency department is analyzed, and the state tree model is developed. The component contribution to the functionality is explicitly expressed using the fault tree method and the failure transfer mechanism is determined by success paths. The functionality is thus defined as the ratio of successful paths to total possible paths. The system fragility is then calculated based on the full probability theory and the results are used to validate the simulation method. The critical components that significantly affect the functionality and the recovery can be identified while considering a practical repair process. Finally, the resilience curve of the emergency department is developed based on the fragility of the components. The effectiveness of the proposed method for the functionality quantification and the resilience evaluation is fully demonstrated.

中文翻译：

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基于状态树法的急诊科抗震能力评估

摘要 医院急诊科是非常重要的系统，在地震中救治伤员。在灾难性地震期间或之后立即恢复它们的功能至关重要；这被称为抗震能力。需要对涉及的组件及其对功能的影响进行系统分析，以量化功能和抗震能力。许多研究使用各种系统分析方法对正常运行条件下的急诊科进行了分析。然而，关于此类系统的震后性能的研究很少。为此，我们提出了一个基于状态树方法的评估框架，以从工程角度量化组件对功能和抗震弹性的影响。分析了一个典型的急诊科，并开发了状态树模型。组件对功能的贡献使用故障树方法明确表达，故障转移机制由成功路径决定。因此，功能被定义为成功路径与总可能路径的比率。然后基于全概率理论计算系统脆弱性，并将结果用于验证模拟方法。在考虑实际的维修过程时，可以确定对功能和恢复有重大影响的关键组件。最后，根据组件的脆弱性，制定了急诊科的弹性曲线。