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NODE: a large‐scale seismic risk prioritization tool for Italy based on nominal structural performance
Bulletin of Earthquake Engineering ( IF 4.6 ) Pub Date : 2021-04-18 , DOI: 10.1007/s10518-021-01093-1
Fabio Petruzzelli , Iunio Iervolino

Prioritization of seismic risk mitigation at a large scale requires rough-input methodologies able to provide an expedited, yet conventional, assessment of the seismic risk corresponding to the portfolio of interest. In fact, an evaluation of seismic vulnerability at regional level by means of mechanics-based methods is generally only feasible for a fraction of the portfolio, selected according to prioritization criteria, due to the sheer volume of information and computational effort required. Therefore, conventional assessment of seismic risk via simple indices has been proposed in literature and in some guidelines, mainly based on the comparison of code requirements at the time of design and current seismic demand. These indices represent an attempt to define a relative seismic risk measure for a rapid ranking to identify the part of the portfolio that deserves further investigation. Although these risk metrics are based on strong assumptions, they have the advantage of only requiring easy-to-retrieve data, such as design year and location as the bare minimum, making them suitable for applications within the risk analysis industry. Moreover, they can take both hazard and vulnerability into account, albeit conventionally, and can be manipulated in order to account for exposure in terms of individual or societal risks. In the present study, the main assumptions, limitations, and possible evolutions of existing prioritization approaches to nominal risk are reviewed, with specific reference to the Italian case. Furthermore, this article presents the software NODE (available to interested readers), which enables the computation of location-specific code-based seismic performance demands, according to the Italian code and the evolution of seismic classification since 1909. Finally, this study intends to contribute to the ongoing debate on strategies for large-scale seismic assessment for building stock management purposes.



中文翻译:

NODE:基于名义结构性能的意大利大型地震风险优先级划分工具

大规模减轻地震风险的优先级要求粗略的输入方法能够提供与感兴趣的投资组合相对应的地震风险的快速而传统的评估。实际上,由于信息量和计算量巨大,通过基于力学的方法在区域级别进行地震脆弱性评估通常仅适用于根据优先级标准选择的一部分资产组合。因此,文献和一些指南中提出了通过简单指标进行地震风险的常规评估,主要是基于设计时的规范要求和当前地震需求的比较。这些指数表示试图为快速排名定义相对地震风险度量,以识别应进一步研究的资产组合部分。尽管这些风险度量基于强大的假设,但它们的优点是仅要求易于检索的数据(例如设计年份和位置)是最低要求,因此使其适合于风险分析行业中的应用。而且,尽管常规地,它们可以同时考虑到危害和脆弱性,并且可以被操纵以从个人或社会风险的角度考虑暴露。在本研究中,回顾了主要的假设,局限性以及现有针对名义风险的优先排序方法的演变,并特别参考了意大利案例。此外,

更新日期:2021-04-18
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