Abstract

The homogeneity of standard Italian railway stations in terms of period of construction (second half of the 19th century), architectural and structural features, typical dimensions and morphology (mostly depending on expected number of passengers) allows the identification of building typologies, with an expected similar behaviour under seismic actions. Four typologies of standard railway stations were identified and, for each of them, variability in building geometry and material parameters was accounted for. Fragility curves were then derived by means of multi-stripe nonlinear dynamic analyses on equivalent-frame 3D macroelement models of the structures, for appropriately selected limit states. The results obtained can be very useful for assessing the seismic vulnerability of this kind of structures, whose seismic behaviour is of strategic importance, both for the potentially high number of victims and for the need of keeping railway lines operational in the aftermath of a seismic event. Also, the results presented in this study could be useful to set prioritization schemes of retrofitting interventions, starting from the identification of the stations most at risk, by combining fragility curves and seismic hazard information.

摘要

标准意大利火车站在建设时期（19 世纪下半叶）、建筑和结构特征、典型尺寸和形态（主要取决于预期的乘客数量）方面的同质性允许识别建筑类型，并具有预期的地震作用下的类似行为。确定了四种类型的标准火车站，并考虑了每种类型的建筑几何形状和材料参数的可变性。Fragility curves were then derived by means of multi-stripe nonlinear dynamic analyses on equivalent-frame 3D macroelement models of the structures, for appropriately selected limit states. 获得的结果对于评估此类结构的地震易损性非常有用，其地震行为具有战略重要性，无论是对于潜在的大量受害者，还是为了在地震事件后保持铁路线运营的需要。此外，本研究中提出的结果可用于设置改造干预的优先级方案，从识别风险最高的台站开始，通过结合脆弱性曲线和地震危险信息。