ABSTRACT

Earthquakes may damage buildings, but they also induce uplift and overturn the content of a building that, in the case of museums, can lead to the irreparable loss of art objects. In many cases, these objects, subjected to seismic actions, can be modeled considering the nonlinear dynamics of rigid blocks. This paper is focused on the seismic behavior of statues, which generally present a quite complex geometry, and are mostly characterized by a pronounced unsymmetrical response under seismic excitations. The proposed study, involving both numerical analyses and experimental tests, is applied to the masterpiece Venere Landolina of the Paolo Orsi museum (Syracuse, Italy). Analytical simulations are conducted according to a novel rigid block model accounting for asymmetric behavior and contact impairments. The experimental campaign is conducted on a scaled physical prototype, built according to a highly detailed digital model obtained by 3D survey. The numerical and experimental campaign is conducted with reference to compatible seismic ground motions, conveniently scaled to cope with scale effects. The results are finally correlated and discussed, showing the potential of the proposed approach for modeling artwork in seismic conditions and the reliability of a combined experimental and numerical strategy to assess the seismic safety of statues.

摘要

地震可能会损坏建筑物，但它们也会引起隆起并推翻建筑物的内容，就博物馆而言，这可能导致艺术品无法弥补的损失。在许多情况下，这些受到地震作用的物体可以在考虑刚性块的非线性动力学的情况下进行建模。本文重点研究雕像的地震行为，这些雕像通常呈现出相当复杂的几何形状，并且主要以地震激发下的明显不对称响应为特征。拟议的研究，包括数值分析和实验测试，应用于杰作Venere Landolina保罗奥尔西博物馆（意大利锡拉丘兹）。分析模拟是根据一种新的刚性块模型进行的，该模型考虑了不对称行为和接触损伤。实验活动是在一个按比例缩放的物理原型上进行的，该原型是根据通过 3D 测量获得的高度详细的数字模型构建的。数值和实验活动是参照兼容的地震地面运动进行的，可以方便地缩放以应对尺度效应。最后对结果进行了关联和讨论，显示了所提出的在地震条件下对艺术品进行建模的方法的潜力以及组合实验和数值策略来评估雕像的地震安全性的可靠性。