Vibration assessment and structural monitoring of the Basilica of Maxentius in Rome

• Published in: Mechanical systems and signal processing Vol. 41; no. 1-2; pp. 454 - 466
• Main Authors: Pau, Annamaria, Vestroni, Fabrizio
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2013
• Subjects: Cracks; Diagnostic systems; Dynamic characterization; Experimental modal analysis; Finite element method; Mathematical analysis; Mathematical models; Monitoring; Monuments; Structural monitoring; Traffic vibrations; Vibration; Dynamic characterization; Structural monitoring; Traffic vibrations; Experimental modal analysis; Monuments
• ISSN: 0888-3270; 1096-1216
• DOI: 10.1016/j.ymssp.2013.05.009

The present paper addresses the analysis of the ambient vibrations of the Basilica of Maxentius in Rome. This monument, in the city centre and close to busy roads, was the largest vaulted structure in the Roman Empire. Today, only one aisle of the structure remains, suffering from a complex crack scenario. The ambient vibration response is used to investigate traffic induced vibration and compare this to values that could be a potential cause of structural damage according to international standards. Using output-only methods, natural frequencies and mode shapes are obtained from the response, allowing comparison with predictions made with a finite element model. Notwithstanding simplifications regarding material behavior and crack pattern in the finite element model, an agreement between numerical and experimental results is reached once selected mechanical parameters are adjusted. A knowledge of modal characteristics and the availability of an updated model may be a first step of a structural monitoring program that could reveal any decay over time in the structural integrity of the monument. •The ambient vibrations of the Basilica of Maxentius in Rome are investigated.•Potential damaging effects are evaluated according to the international standards.•Using output-only methods, natural frequencies and mode shapes are obtained.•The experimental response is compared to predictions of a finite element model.•The updating of selected parameters brings experimental and numerical results into agreement.