Designing monitoring systems for long-term structural response

Daniel Tonelli; Valeria F. Caspani; Stefano Zorzi; Daniele Zonta

doi:10.1117/12.2614035

18 April 2022 Designing monitoring systems for long-term structural response

Daniel Tonelli, Valeria F. Caspani, Stefano Zorzi, Daniele Zonta

Proceedings Volume 12046, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2022; 120460N (2022) https://doi.org/10.1117/12.2614035
Event: SPIE Smart Structures + Nondestructive Evaluation, 2022, Long Beach, California, United States

Abstract

Designing structural health monitoring (SHM) is logically equivalent to designing a civil structure. The capacity must be greater than the demand to achieve the required performance. Monitoring capacity and demand are the counterparts of structural capacity and demand in the semi-probabilistic structural design. They are defined as the uncertainty of key-parameters that represent the structure behaviour and will be estimated through the monitoring system: the capacity is the uncertainty resulting from the estimation, the demand is the design target. As far as concrete and prestressed concrete bridges are concerned, important key-parameters are long-term temperature-compensated responses, such as strain trend, displacement trend, and rotation trend. Their estimation as well as the estimation of their uncertainty can be easily performed a posteriori through Bayesian inference, once monitoring data are available. However, in the design phase measurements are not yet available. We propose an approach for designing a structural health monitoring system accounting for temperature compensation, which allow to quantify the uncertainty of structural response trends a pre-posteriori, before monitoring data are available. We analyse the impact of sensors’ accuracy, monitoring duration, and seasonal temperature variation on the expected uncertainty. Finally, we test our framework on a real-life case study, the Colle Isarco viaduct, one of the longest prestressed concrete highway bridges in the European Alpine region.

Conference Presentation

Citation Download Citation

Daniel Tonelli, Valeria F. Caspani, Stefano Zorzi, and Daniele Zonta "Designing monitoring systems for long-term structural response", Proc. SPIE 12046, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2022, 120460N (18 April 2022); https://doi.org/10.1117/12.2614035

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