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首页> 外文期刊>Bulletin of earthquake engineering >Earthquake-Rotated Objects (EROs) induced by the 2016 M(w)6.0 Amatrice (Central Italy) earthquake: the contribution from site and source effects
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Earthquake-Rotated Objects (EROs) induced by the 2016 M(w)6.0 Amatrice (Central Italy) earthquake: the contribution from site and source effects

机译：2016年（W）6.0 Amatrice（意大利中部）地震诱导的地震旋转对象（EROS）：地点的贡献和源效应

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摘要

The 2016 August 24th, M(w)6.0 Amatrice (Central Italy) normal faulting earthquake produced a remarkable number of Earthquake-Rotated Objects (EROs) that affected chimneys, as well as pillars and capitals on gates and walls. In this paper we present the EROs dataset, and perform some qualitative analyses to evaluate if specific geological and seismological features such as intensity, epicentral distance, potential amplification of the seismic shaking at the site, heterogeneities of the rupture on the fault and directivity effects, and peak ground accelerations, favoured the distribution of EROs observed after the earthquake. A first important outcome is that the distribution of the EROs of Amatrice 2016 mimics the general pattern of damage, and that EROs occurrence should be regarded as a diagnostic element of intensity degrees lower than those presently established by formalized scales. We also find that site factors, namely the surface geology and the local amplification, are the most significant contributors to the EROs occurrence. In addition, we find that the position respect to the fault can enhance the occurrence of local rotations. The distinctive features characterizing the 2016 EROs dataset resemble and substantiate the most important findings produced by previous studies carried out following the 2009 L'Aquila and 2012 Emilia seismic sequences, and allow to calibrate the empirical relations on the EROs distribution presented in the world Catalog of Earthquake-Rotated Objects.
机译：2016年8月24日，M（W）6.0 Amatrice（意大利）正常断裂地震产生了一个显着的地震旋转物体（ERO），影响了烟囱，以及闸门和墙壁上的柱子和资金。在本文中，我们介绍了EROS数据集，并进行了一些定性分析，以评估特定地质和地震学特征，如强度，震中距离，地震震动的潜在放大，故障效应破裂的异质性，和峰地接加速度，有利于地震后观察到的ERO的分布。第一重要结果是，2016年Amatrice的ERO的分布模仿一般的损害模式，并且EROS发生应被视为强度程度低于正式规模所建立的诊断元素。我们还发现现场因素，即地表地质和局部放大，是EROS发生的最重要贡献者。此外，我们发现该位置尊重故障可以增强局部旋转的发生。表征2016年EROS数据集的独特特征类似，并证实了通过2009年L'Aquila和2012年艾米利亚地震序列进行的以前的研究产生的最重要发现，并允许校准世界目录中提出的EROS分发的实证关系地震旋转物体。

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