This work describes an approach for combining local and global non-destructive techniques for the structural characterization and conservation assessment of cultural heritage buildings. An experimental investigation program was conducted on the south vault of St. Mark's Basilica in Venice, involving historical investigations, a damage survey, sonic tests, and ambient vibration measurements. Recorded data were employed to assess the material and structural properties of the vault and to characterize the observed damage pattern. The study of the correlation between results of sonic tests and ambient vibration measurements has shown how, in complex structural typologies, the information provided by both these two kinds of tests are necessary in order to effectively characterize the structural behaviour, which is strongly influenced by the complexity of geometry and restraint condition. Experimental results have been used for the validation of a numerical model adopting a non-conventional approach. The procedure is based on comparing numerical simulation of ambient vibration response in terms of the frequency content of acceleration signals. This approach can be performed using only a limited number of measured acceleration signals, proving to be useful and cost-effective. The work aims to provide helpful insights into the combined use of non-destructive tests for the efficient structural characterization and safety assessment of heritage structures.

中文翻译：

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用于文化遗产结构表征的无损技术：试点案例研究

这项工作描述了一种将本地和全球无损技术相结合的方法，用于文化遗产建筑的结构表征和保护评估。在威尼斯圣马可大教堂的南穹顶上进行了一项实验调查计划，包括历史调查、损坏调查、声波测试和环境振动测量。记录的数据用于评估金库的材料和结构特性，并表征观察到的损坏模式。声波测试结果与环境振动测量结果之间的相关性研究表明，在复杂的结构类型中，这两种测试提供的信息对于有效表征结构行为是必要的，这受到几何复杂性和约束条件的强烈影响。实验结果已用于验证采用非常规方法的数值模型。该程序基于在加速度信号的频率成分方面比较环境振动响应的数值模拟。这种方法可以仅使用有限数量的测量加速度信号来执行，证明是有用且具有成本效益的。这项工作旨在为结合使用无损测试对遗产结构进行有效的结构表征和安全评估提供有益的见解。该程序基于在加速度信号的频率成分方面比较环境振动响应的数值模拟。这种方法可以仅使用有限数量的测量加速度信号来执行，证明是有用且具有成本效益的。这项工作旨在为结合使用无损测试对遗产结构进行有效的结构表征和安全评估提供有益的见解。该程序基于在加速度信号的频率成分方面比较环境振动响应的数值模拟。这种方法可以仅使用有限数量的测量加速度信号来执行，证明是有用且具有成本效益的。这项工作旨在为结合使用无损测试对遗产结构进行有效的结构表征和安全评估提供有益的见解。