Continuous monitoring of the structural health of strategic structures and transport infrastructures plays a crucial role in providing an effective assessment of the safety conditions and in timely planning of the ordinary and extraordinary maintenance programme. Deformation monitoring and dynamic characteristic identification are some commonly used strategies for this purpose. One of the main challenges of recent years in the field of structural health monitoring is the use of data deriving from satellite interferometry, capable of providing information on structural deformations at a local and territorial scale. Despite the solidity and dependability of satellite-based methods for assessing ground deformation over time, when it comes to structural surveillance, there are certain circumstances under which satellites are incapable of accurately assessing displacements. This is particularly true for structures that are sensitive to temperature variations. The paper uses the “Ponte della Musica–Armando Trovajoli” in Rome as a case study to explore these aspects in more depth. This bridge has a steel arch structure with a prestressed concrete deck below it. It represents an example in which satellite differential interferometry does not allow obtaining useful information on displacement, at least for the most deformable portion of the deck, and therefore also on any pathological movements. This work proposes a 3D digital twin of the bridge, appropriately calibrated through experimental measurements of the environmental vibrations performed on the bridge. This will allow to evaluate the role played by thermal deformations related to air temperature variations and thus better understand the connection between physiological deformations and satellite limits.

对战略结构和交通基础设施的结构健康状况进行持续监测对于有效评估安全状况以及及时规划普通和特殊维护计划发挥着至关重要的作用。变形监测和动态特性识别是用于此目的的一些常用策略。近年来结构健康监测领域的主要挑战之一是使用卫星干涉测量数据，该数据能够提供局部和区域范围内的结构变形信息。尽管基于卫星的评估地面变形随时间变化的方法具有可靠性和可靠性，但在结构监测方面，在某些情况下卫星无法准确评估位移。对于对温度变化敏感的结构尤其如此。本文以罗马的“Ponte della Musica-Armando Trovajoli”作为案例研究，更深入地探讨这些方面。这座桥有钢拱结构，下面有预应力混凝土桥面。它代表了一个例子，其中卫星差分干涉测量法不允许获得有关位移的有用信息，至少对于甲板的变形最大的部分而言，因此也无法获得有关任何病态运动的有用信息。这项工作提出了桥梁的 3D 数字双胞胎，通过对桥梁上进行的环境振动进行实验测量来进行适当校准。这将有助于评估与气温变化相关的热变形所发挥的作用，从而更好地了解生理变形和卫星限制之间的联系。