The seismic response of a medieval church in Central Italy is analyzed considering the two roof configurations, i.e., reinforced concrete and timber roofs, that the church had in different periods of its existence. Structural interventions and changes are common in the churches of this territory, where frequent earthquakes put these buildings at risk. The church studied here, St. Salvatore in Acquapagana (Serravalle di Chienti, province of Macerata), was damaged by the 1997 Umbria-Marche and the 2016 Central Italy earthquakes. Between these two seismic events, the church was repaired, and the concrete roof was substituted with a lighter timber roof. To investigate the influence of this change on the seismic response, a study was performed at the building and façade macroelement scales using the finite element model and rigid body spring model, respectively. For each approach, the two roof configurations were considered, and two strong motion records, from September 26, 1997, and October 30, 2016, were applied. The results show that the concrete roof improves the box-like behavior, but it increases the vulnerability of the masonry structures, characterized by a limited tensile strength. Conversely, in the timber roof configuration, the most vulnerable areas of the structure are the intersections between structural elements.

分析了意大利中部一座中世纪教堂的地震响应，考虑了该教堂在其存在的不同时期所具有的两种屋顶结构，即钢筋混凝土和木材屋顶。在该地区的教堂中，结构性干预和变更很常见，那里频繁的地震使这些建筑物处于危险之中。在这里研究的教堂位于Acquapagana的St.Salvatore（马切拉塔省塞拉瓦莱迪基恩蒂），因1997年翁布里亚-马尔什和2016年意大利中部地震而受损。在这两次地震事件之间，对教堂进行了维修，并用较轻的木材屋顶代替了混凝土屋顶。为了研究这种变化对地震响应的影响，我们使用了有限元模型和刚体弹簧模型，对建筑物和外墙的宏观元素进行了研究，分别。对于每种方法，均考虑了两种屋顶构型，并应用了1997年9月26日和2016年10月30日的两次强运动记录。结果表明，混凝土屋顶改善了箱形行为，但增加了砌体结构的脆弱性，其抗拉强度有限。相反，在木质屋顶构型中，结构最脆弱的区域是结构元素之间的交点。