An assessment of damage and seismic fragility of historical unreinforced masonry churches located in Chile’s central valley was carried out employing the results of a field survey of 106 ancient churches, after the 2010 Maule earthquake. The observed damage was correlated with recurrent failure mechanisms of unreinforced masonry structures, by taking into account 22 local mechanisms involving macro-elements on these churches. The average damage level suffered by each church was computed considering the global and local behaviors of the structures through a damage index computed as a weighted mean of the levels of damage observed for each mechanism. The results of this damage index method are used to obtain Probability Mass Functions and suitable probabilistic tools are used to propose Empirical Fragility Curves (EFCs) for these structures. The EFCs are directly usable by stakeholders involved in risk assessment aimed to the prioritization of possible future damage mitigation strategies and other decision making processes relative to this historical heritage.

中文翻译：

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智利中部古代砖石教堂的地震破坏与易损性评估

利用2010年莫尔地震后对106座古老教堂的实地调查结果，对位于智利中央山谷的历史悠久的未加固石工教堂的破坏和地震脆弱性进行了评估。通过考虑22个涉及这些教堂宏观元素的局部机制，观察到的破坏与未加固砌体结构的反复破坏机制相关。考虑到结构的整体和局部行为，计算每个教堂遭受的平均损坏程度，方法是将损坏指数计算为每种机制所观察到的损坏程度的加权平均值。该损伤指数方法的结果用于获得概率质量函数，并使用适当的概率工具为这些结构提出经验易碎性曲线（EFC）。