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Seismic vulnerability of roof systems combining URM gable walls and timber diaphragms

机译：结合URM山墙和木质隔板的屋顶系统的地震易损性

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摘要

Typical low-rise masonry buildings consist of unreinforced masonry (URM) walls covered with various timber roof configurations generally supported or finished by masonry gables. Post-earthquake observations and experimental outcomes highlighted the large vulnerability of the URM gables to the development of overturning mechanisms, both because of the inertial out-of-plane excitation and the in-plane timber diaphragm deformability. This paper presents the static and dynamic experimental seismic performance of three full-scale roofs tested via quasi-static cyclic and shake table tests. Two of them were tested as part of a whole full scale one-storey and two-storey building. A single-degree-of-freedom (SDOF) numerical model is calibrated against experimental data and proposed for the analysis of this roof typology's dynamic behaviour. Several sets of analyses were conducted to assess the vulnerability of these structural components and to study the effect of the whole building's characteristics (eg, number of storeys and structural stiffness and strength) on the seismic performance of this roof typology.
机译：典型的低层砌体建筑由无钢筋砌体（URM）墙组成，上面覆盖着各种木屋顶结构，通常由砌体山墙支撑或完成。地震后的观察和实验结果表明，由于惯性面外激励和面内木diaphragm的可变形性，URM山墙对于倾覆机制的发展具有很大的脆弱性。本文介绍了通过准静态循环和振动台试验测试的三个全尺寸屋顶的静态和动态实验抗震性能。其中两个作为完整的一层和两层完整建筑的一部分进行了测试。针对实验数据对单自由度（SDOF）数值模型进行了校准，并提出了用于分析这种屋顶类型的动态行为的模型。进行了几组分析，以评估这些结构部件的脆弱性，并研究整个建筑物的特征（例如，层数以及结构刚度和强度）对该屋顶类型的抗震性能的影响。

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