Abstract The increased attention paid to the effects of liquefaction on the built environment has led over time to the introduction of vulnerability integral parameters that somehow quantify for a given site and a given seismic shaking the severity of the potential liquefaction damage induced at ground level. If the vulnerability parameter is properly calibrated and effective, it should somehow correlate to the observed damage datasets, increasing as the severity of liquefaction effects increase. In some cases, as for instance for the Canterbury earthquakes (New Zealand, 2010–2011) and for the 2012 Emilia Romagna seismic sequence, the existing vulnerability parameters for the assessment of liquefaction potential were not able to capture the observed damages induced by liquefaction, highlighting that further progress remains to be made in the current state-of-practice. The potentiality of a new index (Induced dAmage paraMeter- IAM), strictly related to the free-field post-volumetric consolidation settlement and therefore based on the estimate of liquefaction induced excess pore pressure, has been verified for a reference site located in the area struck by the 2012 Emilia seismic sequence by means of simplified and 1D effective stress dynamic analyses. The results were compared with those obtained by using one of the most convincing parameters existing in literature (Liquefaction Severity Number, LSN), showing the robustness of IAM, as well as the possibility to calculate it at different levels of complexity (via either coupled, simplified or super simplified and conservative analyses). The outcomes of the analyses allowed to define a simplified procedure for defining liquefaction microzonation maps, then representing a step forward towards the definition of a sound but easy-to-implement procedure to assess the resilience to liquefaction of urban centres.

中文翻译：

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基于孔隙压力累积的液化势积分指数

摘要 随着时间的推移，人们越来越关注液化对建筑环境的影响，引入了脆弱性积分参数，这些参数以某种方式量化了给定地点和给定的地震震动，在地面上引起的潜在液化损坏的严重程度。如果脆弱性参数被正确校准并且有效，它应该以某种方式与观察到的损坏数据集相关联，随着液化影响的严重程度增加而增加。在某些情况下，例如对于坎特伯雷地震（新西兰，2010-2011）和 2012 年艾米利亚罗马涅地震序列，用于评估液化潜力的现有脆弱性参数无法捕捉到液化引起的观察到的损害，强调在目前的实践状况中仍有待取得进一步进展。新指数（诱导损伤参数-IAM）的潜力，与自由场后体积固结沉降密切相关，因此基于液化引起的超孔隙压力的估计，已在位于该地区的参考地点得到验证通过简化和一维有效应力动态分析，2012 年艾米利亚地震序列撞击了 将结果与使用文献中最令人信服的参数之一（液化严重程度数，LSN）获得的结果进行了比较，显示了 IAM 的稳健性，以及在不同复杂程度（通过耦合，简化或超简化和保守分析）。