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A synthetic formulation for the Italian seismic hazard and code implications for the seismic risk

机译:意大利地震危险性的综合表述以及地震危险性的规范含义

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The paper contains two parts. In the first one, the seismic hazard on the Italian territory, as given by the current Italian structural design code, published in 2008, is discussed. Hazard curves, given by the Italian code in a tabular form, are fitted with a single non-linear model and it is shown that a more compact, simple and user-ready territorial hazard description can be applied. The model is valid for both the bedrock and the surface seismic hazards, and is accurate. The surface seismic hazard is computed with a local amplification mapping, which is now well detailed over the entire territory. Departing from these results, in the second part the territorial seismic risk for the ultimate limit state is computed via a parametric fragility curve. From the results, it can be inferred that the codes need further factors calibration, with the aims of guaranteeing both territorially uniform reliability levels, and the traditionally assumed target reliability levels, e.g. those stated in the Eurocodes. (C) 2015 Elsevier Ltd. All rights reserved.
机译:本文分为两部分。在第一个中,讨论了根据2008年发布的现行意大利结构设计规范给出的意大利领土上的地震危险。由意大利法规以表格形式给出的危险曲线与单个非线性模型拟合,结果表明可以使用更紧凑,更简单且易于用户使用的领土危险描述。该模型对于基岩和地表地震危险均有效,并且是准确的。地表地震危害是通过局部放大图计算得出的,现在可以在整个区域内详细了解。与这些结果不同,在第二部分中,通过参数脆性曲线计算了极限极限状态的领土地震风险。从结果可以推断出,代码需要进一步的因素校准,目的是既要保证领土上统一的可靠性水平,又要保证传统上假定的目标可靠性水平,例如,可靠性。欧洲规范中规定的内容。 (C)2015 Elsevier Ltd.保留所有权利。

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